Samples of field corn forage and fodder were analyzed for dicamba and 5 OH dicamba using a GC/ ECD method ( Sandoz Method AM 0691B 0593 3) with a limit of detection of 0.01 ppm. The adequacy of the method for data collection was validated by separately fortifying control samples with dicamba and 5 OH dicamba at 0.01, 0.10, 0.50, and 1.0 ppm for forage and at 0.5 and 1.0 ppm for fodder. Method recoveries were within the acceptable range. The HED review did not capture information pertaining to sample storage intervals. However, there are adequate storage stability data which indicate that dicamba and 5 OH dicamba residues are stable in/ on corn matrices under frozen storage conditions for up to 3 and 2 years, respectively.

The results indicate that the total residues ( dicamba + 5 OH dicamba) in/ on all treated forage samples ranged from < 0.01 to 2.27 ppm. Individual residues in forage were < 0.01 0.31 ppm for dicamba and < 0.01 1.97 ppm for 5 OH dicamba. In treated fodder, the total residues ranged from < 0.01 to 2.45 ppm. Individual residues in fodder were < 0.01 0.33 ppm for dicamba and < 0.01 2.12 ppm for 5 OH dicamba. Analysis of Variance ( ANOVA) statistical analysis was performed on the data collected from the 8 locations where the DMA, DGA, and Na dicamba salt formulations were used. The results indicate that the difference in the magnitude of the residues observed in forage and fodder was influenced by the difference in the trial locations and not by the difference in the dicamba salt formulations.

Corn, pop, stover Established tolerance( s): A tolerance of 3.0 ppm has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on pop corn stover [ 40 CFR § 180.227 ( a)( 1)].

Uses to be supported: According to the Dicamba Master Use Profile ( see Table 4), the DMA, Na, DGA, and K salts of dicamba will be supported on pop corn at a maximum single application rate of 0.5 lb ae/ A and a maximum yearly rate of 0.75 lb ae/ A.

Conclusions: There are no residue data on pop corn stover reflecting the maximum rate of 0.75 lb ae/ A which is the maximum single/ yearly application rate the registrants wish to support for pop corn. HED will allow the translation of available data from field corn stover to pop corn stover since the Dicamba Master Use Profile indicates that the application rate of the two crops is Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 50 of 94 identical. However, any label revision for field corn should also be made for pop corn. Concurrently, any adjustment to the field corn stover tolerance should also be applied as necessary to the pop corn stover tolerance.

Millet ( proso) forage, hay, and straw Established tolerance: A tolerance of 0.5 ppm has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on proso millet straw [ 40 CFR § 180.227 ( a)( 1)]. No tolerances have been established for proso millet forage and hay.

Uses to be supported: According to the Dicamba Master Use Profile ( see Table 4), the DMA salt of dicamba will be supported on proso millet at a maximum single application rate of 0.125 lb ae/ A and a maximum yearly rate of 0.125 lb ae/ A.

Conclusions: The current RAC tolerance level of 0.5 ppm for millet straw was established through an IR 4 petition ( PP# 9E2166) based on residue data ( MRID 00025330) reflecting application rates of 0.125 and 0.25 lb ae/ A ( 1x and 2x). HED will allow the translation of available and requested data for wheat forage, hay, and straw to proso millet forage, hay, and straw since the Dicamba Master Use Profile indicates that the application rate of wheat is higher. Appropriate tolerance levels will be determined once all of the available studies have been reviewed.

Oat forage, hay, and straw Established tolerance( s): Tolerances of 80.0 ppm, 20.0 ppm, and 0.5 ppm are currently established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on oat forage, hay, and straw, respectively [ 40 CFR § 180.227 ( a)( 1)].

Uses to be supported: According to the Dicamba Master Use Profile ( see Table 4), the DMA, Na, and DGA salts of dicamba will be supported on oats at a maximum single application rate of 0.125 lb ae/ A and a maximum yearly rate of 1.0 lb ae/ A.

Conclusions: There are no residue data on oat forage, hay, and straw reflecting the maximum rate of 1.0 lb ae/ A which is the maximum single/ yearly application rate the registrants wish to support for oats. For chronological perspective, it is noted that the tolerance for oat straw was initially established through PP# 8F0666 based on limited data generated on spring seeded oats from trials conducted in VA at application rates of 0.125 lb ae/ A ( 0.125x). In conjunction with PP# s 6F4604 and 4F3041 ( DP Barcode D249098, 10/ 13/ 98 W. Donovan), the tolerance for oat forage was revised to 80.0 ppm, and a tolerance for oat hay was established at 20 ppm based on residue data translated from wheat forage and hay; the cited petition reviews did not address the requirements for oat straw.

For the purpose of reregistration, HED will allow the translation of available and requested data for wheat forage, hay, and straw to oat forage, hay, and straw since the Dicamba Master Use Profile indicates that the application rate of the two crops is identical. Any label revision for Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 51 of 94 wheat should also be made for oats. Concurrently, any adjustment to the wheat forage, hay, and straw tolerances should also be applied as necessary to the oat forage, hay, and straw tolerances.

Rye forage and straw Established tolerance( s): No dicamba tolerances have been established for rye forage and straw.

Uses to be supported: According to the Dicamba Master Use Profile ( see Table 4), the DMA salt of dicamba will be supported on rye at a maximum single application rate of 0.5 lb ae/ A and a maximum yearly rate of 1.0 lb ae/ A.

Conclusions: There are no available residue data on rye forage and straw. HED will allow the translation of available and requested data for wheat forage and straw to rye forage and straw since the Dicamba Master Use Profile indicates that the yearly application rate of the two crops is identical. Any label revision for wheat should also be made for rye. Concurrently, any adjustment to the wheat forage and straw tolerances should also be applied as necessary to the rye forage and straw tolerances that need to be established.

Sorghum forage and stover MRID 43245203 ( DP Barcodes D204488, D204809, and D209229; 7/ 14/ 97; L. Cheng) MRID 44089306 ( DP Barcodes D304019, D306687 D306690; in review, C. Olinger)

Established tolerance( s): A tolerance of 3.0 ppm has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on sorghum forage and sorghum stover [ 40 CFR § 180.227 ( a)( 1)].

Uses to be supported: According to the Dicamba Master Use Profile ( see Table 4), all salts of dicamba will be supported on sorghum at a maximum single application rate of 0.2748 lb ae/ A and a maximum yearly rate of 0.5 lb ae/ A.

Conclusions: The registrant has submitted Craven replacement data depicting residues of dicamba and 5 OH dicamba in/ on sorghum forage and fodder ( stover). These data have been reviewed and deemed adequate to satisfy reregistration requirements pending label revisions and tolerance adjustments. The submitted data show that the maximum combined residues of dicamba and its 5 OH metabolite were 0.46 ppm ( MRID 43245203) and 0.350 ppm ( MRID 44089306) in/ on sorghum forage samples harvested 20 72 days following a single postemergence application at 0.25 lb ae/ A ( 0.5x the seasonal rate listed in the Dicamba Master Use Profile). The maximum combined residues were 8.22 ppm ( MRID 43245203) and 4.29 ppm ( MRID 44089306) in/ on sorghum fodder samples collected at PHIs of 30 42 days following the last of two applications at 0.25 lb ae/ A/ application for a total rate of 0.5 lb ae/ A ( 1x). These data suggest that the established tolerance for sorghum forage may be too high and the tolerance for fodder too low. Based on these data, HED is recommending tolerance levels of 0.5 ppm for sorghum forage and 10.0 ppm for sorghum stover concomitant with the following label revisions: ( i) a 20 day PHI and a maximum single/ seasonal rate of 0.25 lb ae/ A for sorghum forage; and ( ii) a 30 day PHI for sorghum fodder ( stover) at a maximum seasonal rate of 0.5 lb ae/ A. Following an examination of Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 52 of 94 use directions for sorghum, HED will allow a lower use rate for forage since this RAC will be harvested prior to the second crop application.

Discussion of data: The submission for MRID 43245203 contain data depicting residues of dicamba and its 5 OH metabolite in/ on sorghum forage and stover ( fodder); this study also include data on sorghum silage which are not presented herein because silage is no longer considered a significant livestock feed item as per Table 1 of OPPTS 860.1000. A total of 40 field trials were conducted in KS( 8), MO( 8), NE( 8), OK( 8), and TX( 8) using four salt formulations of dicamba: the Na, DGA, K, and DMA salts. Geographic representation of data is more than adequate when the trials conducted from this study along with those conducted from MRID 44089306 are considered. At each test site, one or two applications of each of the four dicamba salt formulations were made at 0.25 lb ae/ A/ application for total rates of 0.25 lb ae/ A ( 0.5x) and 0.5 lb ae/ A ( 1x). Applications were made in 19.6 21.5 GPA using ground equipment. The 0.5x plots were treated when the plants were 15" tall using a broadcast application sprayed directly under the canopy ( 20 109 PTI). The 1x plots received an additional application of 0.25 lb ae/ A when the crop was at the soft dough stage ( 30 42 PTI).

Sorghum forage and fodder samples were analyzed for residues of dicamba and 5 OH dicamba using a GC/ ECD method ( Method AM 0691B) with a limit of detection of 0.01 ppm for each analyte. The adequacy of the method for data collection was validated by fortifying untreated forage and fodder samples with dicamba and 5 OH dicamba at 0.01 0.1 ppm. Method recoveries were within the acceptable range. Samples were stored frozen at < 17 ° C for 28 160 days ( 1 5 months) prior to analysis. There are adequate storage stability data for corn matrices which can be translated to sorghum.

The results show that the combined residues of dicamba and its 5 OH metabolite ranged 0.029 0.46 ppm in/ on sorghum forage samples harvested 20 54 days following a single postemergence application at 0.25 lb ae/ A ( 0.5x). The combined residues ranged 0.132 8.22 ppm in/ on sorghum fodder samples collected at PHIs of 30 42 days following the last of two applications at 0.25 lb ae/ A/ application for a total rate of 0.5 lb ae/ A ( 1x).

MRID 44089306: A total of seven sorghum trials were conducted in Regions 2 ( NC; 1 trial), 4 ( LA; 1 trial), 5 ( IL and KS; 2 trials); 6 ( OK; 1 trial), 7 ( NE; 1 trial), and 8 ( TX; 1 trial) during the 1995 growing season. The DMA salt of dicamba was the test formulation used in all trials. At each field trial site, two separate plots were treated with either a single post directed spray application made under the crop canopy of 15 inch tall sorghum plants at a rate of 0.25 lb ae/ A ( 0.5x) or two applications ( one post directed application followed by a second broadcast application made at soft dough stage) at 0.25 lb ae/ A/ application, with a 44 to 65 day retreatment interval, for a total rate of 0.5 lb ae/ A ( 1x). Applications were made in 10 36 gal/ A of water using ground equipment. Forage samples were collected from 0.5x treated sites at PHIs of 49 72 days. Fodder samples were collected from the 1x treated sites at PHIs of 30 34 days.

Samples were analyzed for residues of dicamba and its 5 OH metabolite using GC/ ECD method AM 0691B 0593 3 with a validated LOQ of 0.02 ppm for each analyte. The method is adequate for data collection based on acceptable concurrent method recovery data. Samples were stored Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 53 of 94 frozen for 56 137 days ( 1.8 4.5 months) for forage and 43 191days ( 1.4 6.3 months) for fodder prior to residue analysis. There are adequate storage stability data for corn matrices which can be translated to sorghum.

The results show that the maximum combined residues of dicamba and its 5 OH metabolite were 0.350 ppm in/ on sorghum forage harvested 49 72 days following a single post directed spray application at 0.25 lb ae/ A ( 0.5x). The maximum combined residues were 4.29 ppm in/ on sorghum fodder harvested 30 34 days following the last of two applications ( one post directed followed by a second broadcast application made at soft dough stage) at 0.25 lb ae/ A/ application for a total rate of 0.50 lb ae/ A ( 1.0x).

Wheat forage and hay MRID 43274501 ( DP Barcodes D220469, D220471, D220473, and D220430; 5/ 2/ 96; F. Griffith)

Established tolerance( s): Tolerances of 80.0 ppm and 20.0 ppm are currently established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on wheat forage and hay, respectively [ 40 CFR § 180.227 ( a)( 1)].

Uses to be supported: According to the Dicamba Master Use Profile ( see Table 4), the DMA, Na, DGA, and IPA salts of dicamba will be supported on wheat at a maximum single application rate of 0.5 lb ae/ A and a maximum yearly rate of 1.0 lb ae/ A.

Conclusions: The registrant has submitted data ( MRID 43274501) from seven field trials depicting residues of dicamba and 5 OH dicamba in/ on wheat forage and hay. These data have been reviewed and deemed inadequate because of inadequate geographic representation of data. The registrant has committed ( DP Barcodes D228694 and D239967, 6/ 25/ 98, S. Chun) to conduct additional wheat forage and hay field trials. A magnitude of the residue study ( MRID 44891302) in wheat forage and hay has been identified and is currently under review.

The available data, excluding those under review, indicate that the maximum combined residues of dicamba and 5 OH dicamba were 16 ppm, 14 ppm, and 12 ppm in/ on wheat forage samples harvested immediately ( 0 day PHI) following a single application of the respective DMA, DGA, and Na salts of dicamba at 0.125 0.5 lb ai/ A. In wheat hay, the maximum combined residues were 4.9 ppm, 4.6 ppm, and 4.8 ppm from samples harvested 14 days following a single application of the respective DMA, DGA, and Na salts of dicamba at 0.125 0.5 lb ai/ A. The adequacy of the existing tolerances will be addressed once all of the studies have been reviewed.

Discussion of wheat forage and hay data: The submission for MRID 43274501 contain data depicting residues of dicamba and 5 OH dicamba in/ on wheat forage and hay from seven trials conducted during the 1993 growing season. The locations of wheat trials from the subject study are as follows: Regions 5 ( KS; 1 trial), 6 ( TX; 1 trial), 7 ( ND; 1 trial), 8 ( CO and KS; 2 trials), 9 ( MT; 1 trial), and 11 ( WA; 1 trial). The initial HED review of this study ( DP Barcodes D220430, ... 5/ 2/ 96, F. Griffith) concluded that geographic representation of data is inadequate. The registrant has subsequently committed to conduct additional wheat forage and hay field trials ( DP Barcodes D228694 and D239967, 6/ 25/ 98, S. Chun). Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 54 of 94 Five of these trials were with winter wheat varieties, and two were with spring wheat varieties. Each trial location consisted of a control plot and six test plots for three different dicamba formulations ( DMA, DGA, and Na salts) at two different application rates. Three treated test plots received one application at 0.125 lb ai/ A in 9 31 gallons of water using ground equipment with wheat forage samples harvested at a 0 day PHI. The other three test plots received one application at 0.5 lb ai/ A with wheat forage samples harvested at a 0 day PHI. Wheat hay samples from all test plots were cut 14 days later and allowed to field dry 3 7 days before collection/ harvest as wheat hay. Samples were analyzed for dicamba and 5 OH dicamba using a GC/ ECD method ( Method AM 0691B 0593 3) with an LOQ of 0.01 ppm. Recovery data for wheat forage and hay were acceptable to support the method as suitable to gather the magnitude of the residue data. Samples were stored frozen for an unspecified interval prior to residue analysis. The HED review concluded that there are adequate storage stability data on wheat forage and hay which support sample storage conditions and intervals.

The results show that all field trials from the 0.125 lb DMA dicamba application to wheat forage had detectable residues at 0 day PHI ranging from 6.7 to 16 ppm ( 2 trials). Maximum residues were 14 ppm when the DGA dicamba was applied, and 12 ppm from the application of the Na salt. Likewise, all wheat hay samples had detectable total dicamba results. Total residues of dicamba on 14 day PHI wheat hay ranged from 0.62 ppm to 4.9 ppm from application of DMA dicamba. Maximum residues were 4.6 ppm from the application of DGA dicamba, and 4.8 ppm from the application of the Na salt.

Wheat straw MRID 44089305 ( DP Barcode D228703, 7/ 16/ 98, S. Chun)

Established tolerance: A tolerance of 30.0 ppm has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on wheat straw [ 40 CFR § 180.227 ( a)( 1)].

Uses to be supported: According to the Dicamba Master Use Profile ( see Table 4), the DMA, Na, DGA, and IPA salts of dicamba will be supported on wheat at a maximum single application rate of 0.5 lb ae/ A and a maximum yearly rate of 1.0 lb ae/ A.

Conclusions: There are Craven replacement data ( MRID 44089305) depicting residues of dicamba and 5 OH dicamba in/ on wheat straw. These data, however, do not support the maximum seasonal rate of 1.0 lb ae/ A that is listed in the Dicamba Master Use Profile because the wheat trials were conducted at application rates of 0.25 or 0.5 lb ae/ A. The combined residues of dicamba and 5 OH dicamba ranged from 0.011 to 0.97 ppm in/ on samples of wheat straw harvested 63 125 days following one spring broadcast application of representative dicamba salt formulations at 0.25 lb ae/ A ( 0.25x). The combined residues ranged from 0.13 to 26 ppm in/ on straw samples harvested 6 12 days following the last of two treatments for a total of 0.5 lb ae/ A ( 0.5x).

For the purpose of reregistration, the registrants are required to submit additional data on wheat straw reflecting a maximum seasonal rate of 1.0 lb ae/ A. Alternatively, the registrants may rely on the available data provided they are willing to revise product labels for consistency with the Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 55 of 94 reviewed data. If the registrants elect to choose the latter option, then they will be required to revise product labels to specify a maximum seasonal rate of 0.5 lb ae/ A and a 7 day PHI for wheat straw. The existing tolerance of 30 ppm for wheat straw will be considered adequate if the registrants elect to revise product labels.

Discussion of data: The submission for MRID 44089305 report data depicting residues of dicamba and 5 OH dicamba in/ on wheat straw. A total of 20 field trials were conducted during the 1995 growing season in16 states: CO( 2), ID, IL, KS( 2), MN, MO, MS, MT( 2), NE, NM, NC, ND, OH, OK( 2), TX, and WY. These states cover EPA regions II ( 1), IV ( 1), V( 5), VI ( 1), VII ( 5), VIII ( 6), and XI ( 1). Geographic representation of data is adequate since the number and location of wheat trials is in accordance with Tables 1 and 5 of GLN 860.1500. The wheat field trials were conducted using the following salt formulations of dicamba: DMA, DGA, and Na.

Two treatment patterns, designated as A and B, were employed in this study. Treatment A consisted of a spring broadcast application at 0.25 lb ae/ A ( 0.25x) made to the crop immediately prior to first joint ( POPO1). Treatment B consisted of Treatment A plus a preharvest broadcast application at 0.25 lb ae/ A, made 7 days before harvest ( POPO2) for a total of 0.5 lb ae/ A ( 0.5x). The DMA salt formulation of dicamba was applied in 10 trial locations. Side by side trials with the DMA, DGA, and Na salt formulations of dicamba were conducted at four trial locations to compare the residues found from use of the different salt formulations. Samples were analyzed for dicamba and 5 OH dicamba using a GC/ ECD method ( Sandoz Method AM 0691B 0593 3) with a limit of detection of 0.01 ppm. The adequacy of the method for data collection was validated by fortifying straw control samples with dicamba and 5 OH dicamba at 0.02 and 0.10 ppm. Method recoveries were within the acceptable range. However, the HED review noted that the method was not validated over an acceptable range since residue levels in wheat straw were found well above the ranges of the method validation. The HED review, thus, requested additional method validation at a spike level of up to 30 ppm for wheat straw. Wheat straw samples were stored frozen for 51 220 days (~ 2 7 months) prior to residue analysis. There are adequate storage stability data available for field corn matrices which may be translated to wheat straw.

The results indicate that the total residues ( dicamba + 5 OH dicamba) in/ on all treated straw samples ranged 0.011 0.97 ppm for Treatment A ( 0.25x) and 0.13 26 ppm for Treatment B ( 0.5x). Analysis of Variance ( ANOVA) statistical analysis was performed on the data collected from the four locations where the DMA, DGA, and Na dicamba salt formulations were used. The results indicate that the difference in the magnitude of the residues observed in straw was influenced by the difference in the trial locations and not by the differences in the dicamba salt formulations.

Grass, Forage, Fodder, and Hay, Group 17 Pasture and rangeland grasses MRID 43370701 ( DP Barcode D207649, 3/ 11/ 96, L Cheng) ( DP Barcodes D220469, D220471, D220473, and D220430; 5/ 2/ 96; F. Griffith) ( DP Barcodes D228694 and D239967, 6/ 25/ 98, S. Chun) Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 56 of 94 Established tolerance( s): Tolerances for Crop Group 17 ( grass, forage, fodder, and hay group) are currently established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on grass forage at 125.0 ppm and grass hay at 200.0 ppm [ 40 CFR § 180.227 ( a)( 1)].

Uses to be supported: The Dicamba Master Use Profile ( see Table 4) lists separate entries on: ( i) hay; ( ii) pastures; ( iii) rangeland; and ( iv) Sudangrass. On hay, the DMA, Na, and DGA salts of dicamba will be supported at a maximum single and yearly application rate of 2.0 lb ae/ A based on labels for EPA Reg. Nos. 51036 289 and 7969 131. On pastures and rangeland, the DMA, Na, and DGA salts of dicamba will be supported at a maximum single and yearly application rate of 2.0 lb ae/ A. There is an endnote in Table 4 which specifies that the label for EPA Reg. No. 100 884 lists 7.7 lb ae/ A as the maximum rate for spot treatment of pastures and rangelands. The 2.0 lb ae/ A is what the registrant stated at the SMART Meeting as the rate they intended to support. On Sudangrass, the DMA salt of dicamba will be supported at a maximum single rate of 0.5 lb ae/ A for hay and a maximum yearly rate of 1.0 lb ae/ A.

Conclusions: An acceptable study ( MRID 43370701) depicting residues of dicamba and 5 OH dicamba is available and may be used to satisfy reregistration requirements pending tolerance adjustments and label amendments. This study was first reviewed by HED ( DP Barcode 207649, 3/ 11/ 96, L Cheng) as a response to the requirements of the Dicamba ( SRR) Registration Standard dated 6/ 30/ 89. The study was re evaluated and addressed in conjunction with PP# 6F4604: ( i) DP Barcodes D220469, D220471, D220473, and D220430; 5/ 2/ 96; F. Griffith; and ( ii) DP Barcodes D228694 and D239967, 6/ 25/ 98, S. Chun. The currently established tolerance levels of 125.0 ppm and 200.0 ppm for grass forage and hay, respectively, were established in conjunction with PP# 6F4604 based on residue data reflecting a maximum seasonal application rate of 1.0 lb ae/ A.

According to the Dicamba Master Use Profile, the registrants now wish to support a maximum single/ yearly application rate of 2.0 lb ae/ A for grasses grown in pastures and rangeland. For the purpose of generating this Chapter, the available grass forage and hay data were re evaluated with the information that a maximum seasonal rate of 2.0 lb ae/ A will be supported at a 0 day PHI/ PGI for forage and a 7 day PHI for hay. The Agency currently requires zero day crop field residue data for grasses cut for forage ( unless its is not feasible, e. g., preplant/ preemergence uses) but allow a reasonable interval before cutting for hay ( Table I of OPPTS 860.1000). A 7 day PHI for grass hay is the interval that the registrants previously proposed in PP# 6F4604.

The available data indicate that the combined residues of dicamba and 5 OH dicamba ranged 66 358 ppm in/ on grass forage samples harvested immediately ( 0 day) following a single application of representative formulations of dicamba ( DMA, DGA, or Na salts) at 2.0 lb ae/ A ( 1x). The combined residues ranged 25 201 ppm in/ on grass hay samples harvested 7 days following a single application of representative formulations at 2.0 lb ae/ A ( 1x). Based on these data, HED is reassessing the grass forage tolerance at 400 ppm and the grass hay tolerance at 250 ppm.

Concomitant with these tolerance reassessment, HED is requesting RD to verify that all dicamba labels specify a 0 day PHI/ PGI for grass forage and a 7 day PHI for grass hay when applied at a Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 57 of 94 maximum of 2.0 lb ae/ A. In addition, HED is recommending the removal of the spot treatment use on pastures and rangeland at 7.7 lb ae/ A ( from EPA Reg. No. 100 884) because there are no available data supporting this use rate; alternatively, the registrants may submit data to support this application rate.

Discussion of data: The submission for MRID 43370701 contain data depicting residues of dicamba and 5 OH dicamba in/ on grass forage and hay. A total of 295 tests were conducted in FL( 15), GA( 35), IN( 15), KS( 15), TN( 15), MI( 15), NE( 15), OK 1( 35), OK 2( 15), OR( 35), MO( 35), TX( 15), and WI( 35) using three formulations: the DMA, DGA, and Na salts of dicamba. Geographic representation of residue data is adequate with regard to the number of field trials. One application of the DMA salt was made at 0.5, 1.0, or 2.0 lb ae/ A in separate tests at each test site. For the DGA and Na salts, one application was made at 0.5 or 2.0 lb ae/ A in separate tests at each test site; however, samples were collected only from WI, MO, OR, GA, and OK 1 test sites. Applications were made in 7 23 GPA of water using ground equipment to actively growing grasses. Forage and hay samples were collected at 0, 7, 14, 28, and 56 day post treatment intervals ( PTI). Hay samples were allowed to field dry for 2 3 days prior to collection. One to two controls samples were collected from the 7,14, 28, and 56 day PTI plots.

Samples were stored at < 1 ° C for 72 to 402 days prior to analysis. This storage interval is supported by adequate storage stability data. Samples were analyzed for residues of dicamba and its hydroxy metabolite using GC/ ECD Method AM 0691B which was deemed adequate for data collection based on acceptable concurrent method recoveries.

The results show that the combined residues of dicamba and 5 OH dicamba ranged 66 358 ppm in/ on grass forage samples harvested immediately ( 0 day) following a single application of representative formulations of dicamba ( DMA, DGA, or Na salts) at 2.0 lb ae/ A ( 1x). The combined residues ranged 25 201 ppm in/ on grass hay samples harvested 7 days following a single application of representative formulations at 2.0 lb ae/ A ( 1x). Based on the results, it was concluded that dicamba residues are not dependent on which formulation is used, but may depend on the location where used.

Miscellaneous Commodities Asparagus MRIDs 43245206 and 43425803 ( DP Barcodes D204488, D204809, and D209229; 7/ 14/ 97; L. Cheng)

Established tolerance( s): A tolerance of 4.0 ppm has been established for the combined residues of dicamba and its DCSA metabolite in/ on asparagus [ 40 CFR § 180.227 ( a)( 2)].

Uses to be supported: According to the Dicamba Master Use Profile ( see Table 4), the DMA, Na, and DGA salts of dicamba will be supported on asparagus at a maximum single application rate of 0.5 lb ae/ A and a maximum yearly rate of 0.5 lb ae/ A.

Conclusions: The registrant has submitted adequate data depicting residues of dicamba and its DCSA metabolite in/ on asparagus. These data indicate that the combined residues of dicamba Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 58 of 94 and its DCSA metabolite ranged 0.28 3.29 ppm in/ on asparagus ( n= 48 samples) harvested 24 hours following a single application of representative dicamba salt formulations at 0.5 lb ae/ A ( 1x the maximum rate listed in the Dicamba Master Use Profile). These data support the currently established tolerance of 4.0 ppm on asparagus pending verification by RD that the label PHI for asparagus is 24 hours or 1 day.

Discussion of data: The submissions for MRIDs 43245206 and 43425803 contain data depicting residues of dicamba, 5 OH dicamba, and DCSA in/ on asparagus. A total of 24 asparagus field trials were conducted in CA( 3) and WA( 3) in 1993 and in CA( 6), MI( 6), and WA( 6) in 1994. The number and location of asparagus trials are adequate with respect to geographic representation of data. For the tests conducted in 1994, the six trials in each state represent two test locations ( 1 and 2) with three tests at each site. At each test site, the following three dicamba salt formulations were used: Na, DGA, and DMA. At each test site, one broadcast application of each of the three dicamba formulations was made at 0.5 lb ae/ A ( 1x) in 20 50 GPA of water using ground equipment. Asparagus spears were harvested 24 hours after application.

Samples were analyzed for dicamba and DCSA using GC/ ECD method AM 0766A. Additional samples were analyzed for 5 OH dicamba using method AM 0691B. These methods are adequate for data collection based on acceptable concurrent method recoveries. Samples were stored frozen at < 12 ° C for 12 95 days prior to analysis. Adequate storage stability data are available which indicate that residues of dicamba and DCSA are stable in/ on asparagus for up to 104 days of frozen (< 12 ° C) storage, and that residues of 5 OH dicamba are also stable for up to 119 days of frozen (< 12 ° C) storage.

The results show that the maximum combined residues of dicamba and DCSA were 1.1 ppm in/ on 36 asparagus samples from CA and WA harvested 24 hours following a single application at 0.5 lb ae/ A of the Na salt, DGA salt, or the DMA salt of dicamba. The maximum combined residues of dicamba and DCSA were 3.29 ppm in/ on 12 asparagus samples grown in MI harvested 24 hours following a single application at 0.5 lb ae/ A of the dicamba Na, DGA, or DMA salt formulation. The field trial data indicate that the residue levels are not dependent on the salt formulation used.

Aspirated grain fractions MRID 43245205 ( Sorghum) ( DP Barcodes D204488, D204809, and D209229; 7/ 14/ 97, L. Cheng) MRID 43814102 ( Soybean) ( DP Barcodes D223283, ..., 7/ 29/ 96; S. Knizner, W. Dykstra, and C. Lewis) MRID 44089305 ( Wheat) ( DP Barcode D228703, 7/ 16/ 98, S. Chun)

Established tolerance( s): A tolerance of 5100 ppm has been established for the combined residues of dicamba and its metabolites ( 5 OH dicamba and DCSA) in/ on aspirated grain fractions [ 40 CFR § 180.227 ( a)( 3)].

Uses to be supported: Refer to " Legume Vegetables ( Crop Group 6)" section for supported uses on soybean seed and " Cereal Grains ( Crop Group 15)" section for supported uses on field corn, sorghum, and wheat. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 59 of 94 Conclusions: There are adequate residue data on the aspirated grain fractions ( also known as grain dusts) of sorghum, soybean, and wheat. [ Although samples collected from the sorghum and wheat studies were only analyzed for dicamba and 5 OH dicamba, HED would not ask registrants to repeat these studies because samples from the soybean study, which produced the highest residues, were analyzed for dicamba, 5 OH dicamba, and DCSA.] Summaries of the submitted grain dust data are presented below. The highest processing factor found was 670x, for dicamba in soybean seed aspirated grain fractions. The average residues found in the field trial application schedule was 1.36 ppm. Multiplying 670 by 1.36 yields 941 ppm, so the rounded value for the reassessed tolerance would be 1000 ppm.

Sorghum aspirated grain fractions: Two trials were conducted in Peru ( 1) and Dodge City ( 1), KS depicting residues of dicamba and 5 OH dicamba in/ on the aspirated grain fractions of sorghum. Applications were made at a total of 0.5 lb ae/ A ( 1x the maximum yearly rate listed in the Dicamba Master Use Profile) and 1.5 lb ae/ A ( 3x) at both sites. Grain samples were harvested and analyzed by Sandoz Agro, Inc. ( Des Plaines, IL) as pre qualifier samples. The 3x trial from Dodge City bore the highest residues in grain samples, therefore, only treated samples from this trial were processed for grain dust generation. Grain dust was generated in a steel bucket elevator using a process that was designed to simulate a commercial elevator operation. Upon generation, the grain dust samples were sent to the analytical facility of Sandoz where they were held frozen at < 17 ° C for up to 2 months prior to analysis. The treated RAC sample was held frozen for 4 months prior to analysis. One treated grain sample and one of each > 2030, > 1180, > 850, > 425, and < 425 : m treated grain dust samples were analyzed. Residues of dicamba and 5 OH dicamba were determined using the GC/ ECD method AM 0691B which is adequate for data collection. Following treatment at a total of 1.5 lb ae/ A, the maximum combined residues of dicamba and 5 OH dicamba were 6.9 ppm in/ on sorghum grain ( RAC) and 27.1 ppm in/ on the aspirated grain fractions of sorghum. Individual ranges of residues in/ on treated sorghum grain dusts were 10.0 17.6 ppm and 3.2 9.5 ppm for dicamba and 5 OH dicamba, respectively.

Soybean aspirated grain fractions: One trial was conducted in IL depicting residues of dicamba, DCSA, and 5 OH dicamba in/ on the aspirated grain fractions of soybeans. In this trial, soybean seeds were harvested 5 days following a single preharvest broadcast application of the 4 lb/ gal soluble concentrate DMA formulation of dicamba at 10 lb ae/ A ( 5x the maximum rate listed in the Dicamba Master Use Profile). Samples were harvested using a combine, and the harvested samples were transported in gravity flow wagons to the machine shed for bagging. Samples were frozen within 3 hours of harvest and shipped frozen to the processing facility, Texas A & M Food Protein Research and Development Center ( Bryan, TX) 26 days after harvest. Adequate descriptions of procedures used for the generation of soybean grain dusts were included in the study. It is, however, noted that grain dust was separated into various fractions by sieving, and that the sieved fractions were then recombined before residue analysis. Samples were analyzed for residues of dicamba, 5 OH dicamba, and DCSA using GC Method No. AM 0941 1094 0 with an LOQ of 0.01 ppm for each soybean matrix. In this method, residues of dicamba and DCSA were quantitated by GC with a Ni ECD, while residues of 5 OH dicamba were quantitated separately by GC/ ECD. The data collection method used is adequate based on acceptable recoveries from method validations. All samples were stored frozen at the analytical laboratory Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 60 of 94 prior to analysis. Total storage interval, between harvest and analysis, were 146 170 days ( 5 6 months) for grain dusts.

The results of the study indicate that the average residues of dicamba, 5 OH dicamba, and DCSA in/ on two treated soybean seed ( RAC) samples were 0.543 ppm, < 0.01 ppm, and 0.014 ppm, respectively. In treated soybean aspirated grain fractions, for which > 50% of the fractions were < 425 : m in size, the average residues were: 365 ppm for dicamba, 2.8 ppm for 5 OH dicamba, and 3.0 ppm for DCSA.

Wheat aspirated grain fractions: For the generation of wheat grain dust, 30 lb grain samples were collected from the wheat field trials and batched together. The grain samples were dried at 110 150 ° F until the moisture content was 10 13%. The grain samples were then placed in a dust generation room on a drag conveyor and moved for 120 minutes. As the sample was moved in the system, aspiration was used to remove the grain dust. The resulting dust was classified by size using sieves. The whole grain, representing the RAC before the generation of grain dusts, bore a combined residue ( dicamba + 5 OH dicamba) of 0.44 ppm. The grain dust samples had combined residues of 4.8 ppm (> 425 : m to < 2030 : m) and 4.7 ppm (< 425 : m).

Cotton, undelinted seed and gin byproducts MRID 43814001 ( DP Barcodes D220469, D220471, D220473, and D220430; 5/ 2/ 96; F. Griffith) MRID 45196801 ( C. Olinger, under review)

Established tolerance( s): A tolerance of 5.0 ppm has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on undelinted cottonseed [ 40 CFR § 180.227 ( a)( 1)]. No tolerance is established for cotton gin byproducts.

Uses to be supported: According to the Dicamba Master Use Profile ( see Table 4), the DMA, and DGA salts of dicamba will be supported on field corn at a maximum single application rate of 0.25 lb ae/ A and a maximum yearly rate of 2.0 lb ae/ A.

Conclusions: A study describing dicamba residues on cotton gin by products is currently under review ( MRID 45196801), and will be completed by Phase III of reregistration. In MRID 43814001, 12 field trials were conducted in 1994 as follows: one from Region 2 [ Georgia], 8 from Region 4 [ Louisiana ( 3), Mississippi ( 2), Tennessee, and Arkansas ( 2)], two from Region 6 [ Texas], and one from Region 8 [ Texas]. The dicamba sodium salt formulation was applied once at the 0.5 lb ai/ acre rate in 10 20 gallons of water using ground equipment 14 days prior to planting cotton. Cotton was harvested at maturity by hand, ginned with the lint discarded, and the cottonseed and gin by products ( consisting of burrs, stems, and leaves) were collected for analysis. The maximum residue detected in cottonseed from the proposed new use is 0.05 ppm of the 5 OH metabolite in only one field trial. Several control cotton gin by product samples contained dicamba or 5 OH dicamba equivalents in the 0.04 0.06 ppm range, which was comparable to the levels found in the treated samples. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 61 of 94 Sugarcane MRID 44089302 ( DP Barcodes D304019, D306687 D306690; under review; C. Olinger)

Established tolerance( s): Tolerances of 0.1 ppm are currently established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on sugarcane, sugarcane forage, sugarcane fodder [ 40 CFR § 180.227 ( a)( 1)]. The Agency no longer considers sugarcane forage and fodder to be significant livestock feed items, and these items have been deleted from Table 1 of OPPTS 860.1000. Therefore, HED is recommending the revocation of the tolerances for sugarcane forage and fodder.

Uses to be supported: According to the Dicamba Master Use Profile ( see Table 4), the DMA, Na, and DGA salts of dicamba will be supported on sugarcane at a maximum single application rate of 2.8 lb ae/ A and a maximum yearly rate of 2.8 lb ae/ A.

Conclusions: There are Craven replacement data ( MRID 44089302) depicting residues of dicamba and 5 OH dicamba in/ on sugarcane. These data, however, do not support the maximum seasonal single/ yearly rate of 2.8 lb ae/ A that is listed in the Dicamba Master Use Profile because the sugarcane trials were conducted at an application rate of 2.0 lb ae/ A ( 0.7x). The submitted data indicate that the maximum combined residues of dicamba and its 5 hydroxy metabolite were 0.202 ppm, 0.186 ppm, and 0.054 ppm in/ on sugarcane harvested 87 173 days following a single layby application of the respective DMA, DGA, Na salt formulations of dicamba to sugarcane crop at 2.0 lb ae/ A. The maximum combined HAFT level was 0.183 ppm obtained from samples treated with the DGA salt.

For the purpose of reregistration, the registrants are required to submit additional data on sugarcane reflecting a maximum single/ yearly rate of 2.8 lb ae/ A. Alternatively, the registrants may rely on the available data provided they are willing to revise product labels for consistency with the reviewed data. If the registrants elect to choose the latter option, then they will be required to revise product labels to specify a maximum seasonal rate of 2.0 lb ae/ A and an 87 day PHI for sugarcane. The existing tolerance of 0.1 ppm for sugarcane is inadequate and HED is recommending that it be reassessed at 0.3 ppm if the registrants elect to revise product labels as detailed above.

Discussion of data: The submission for MRID 44089302 depict residues of dicamba and its metabolite ( 5 OH dicamba) in/ on sugarcane. A total of eight sugarcane trials were conducted in Regions 3 ( FL; 3 trials), 4 ( LA; 3 trials), 6 ( TX; 1 trial), and 13 ( HI; 1 trial) during the 1995 growing season. The number and locations of field trials are adequate and in accordance with OPPTS Guideline 860.1500. At three test locations ( FL, HI, and LA), the DMA, DGA, Na salt formulations of dicamba were applied side by side to separate plots of sugarcane at layby at a rate of 2.0 lb ae/ A ( 0.7x the maximum yearly rate listed in the Dicamba Master Use Profile). At the remaining five test locations ( FL; 2 trials, LA; 2 trials, and TX; 1 trial), a single application of the DMA salt formulation was also made at layby at the same rate. Applications were made in 15 30 gal/ A of water using ground equipment. Sugarcane was harvested 87 173 days posttreatment. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 62 of 94 Samples were analyzed for residues of dicamba and its hydroxy metabolite using GC/ ECD method AM 0691B 0593 3. The validated LOQ is 0.02 ppm for dicamba and 5 OH dicamba. The LOD is 0.01 ppm. The method is adequate for data collection based on acceptable concurrent method recovery data. The maximum storage intervals of sugarcane samples from harvest to analysis were 140 days ( 4.6 months). No storage stability data are available for sugarcane. HED will translate the available storage stability data for corn forage and fodder to sugarcane. These data ( MRID 43866601; D228703, S. Chun, 7/ 16/ 98) indicate that residues of dicamba and 5 OH dicamba are stable in/ on all corn RACs ( forage, silage, grain, and fodder) stored frozen for up to 3 and 2 years, respectively.

The results show that the maximum combined residues of dicamba and its 5 hydroxy metabolite were 0.202 ppm, 0.186 ppm, and 0.054 ppm in/ on sugarcane harvested 87 173 days following a single layby application of the respective DMA, DGA, Na salt formulations of dicamba at 2.0 lb ae/ A. The maximum combined HAFT level was 0.183 ppm obtained from samples treated with the DGA salt.

860.1520 Processed Food and Feed Barley Established tolerance( s): No tolerance has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on any barley processed commodities.

Conclusions: There are no available barley processing data with dicamba. Consistent with the recommendation of the Dicamba SRR, HED will allow translation of the submitted wheat processing data to barley. The most recent acceptable wheat processing study ( MRID 42675901) indicates that the combined residues of dicamba and 5 OH dicamba did not concentrate in any of the wheat processed fractions. Thus, tolerances in the barley processed fractions ( pearled barley, flour, and bran) are not necessary.

Corn Established tolerance( s): No tolerance has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on any corn processed commodities.

Conclusions: A corn processing study ( MRID 41187301) is currently under review.

Cottonseed Established tolerance( s): A tolerance of 5.0 ppm has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on cotton meal [ 40 CFR § 180.227 ( a)( 1)].

Conclusions: Unless the registrants elect to support uses on cotton, HED is recommending the revocation of the established tolerance for cotton meal. Should the registrants change their Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 63 of 94 decision and elect to support dicamba uses on cotton in the future, HED will re evaluate the available cotton processing data in PP# 1G2502 ( 7/ 28/ 81 memo of A. Rathman).

Millet Established tolerance( s): No tolerance has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on any millet processed commodities.

Conclusions: According to Table 1 of OPPTS 860.1000, the only processed commodity associated with millet is flour. Endnote 44 of Table 1 specifies that millet flour is not produced significantly in the U. S. for human consumption, and residue data are not needed at this time.

Oat Established tolerance( s): No tolerance has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on any oat processed commodities.

Conclusions: There are no available oat processing data with dicamba. Consistent with the recommendation of the Dicamba SRR, HED will allow translation of the submitted wheat processing data to oats. The most recent acceptable wheat processing study ( MRID 42675901) indicates that the combined residues of dicamba and 5 OH dicamba did not concentrate in any of the wheat processed fractions. Thus, tolerances in the oat processed fractions ( flour and groats/ rolled oats) are not necessary.

Sorghum Established tolerance( s): No tolerance has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on any sorghum processed commodities.

Conclusions: The Dicamba SRR ( 6/ 89) required a sorghum processing study depicting the combined residues of dicamba and its hydroxy metabolite in milled products ( flour and starch) and grain dust from sorghum grain bearing measurable, weathered residues. In response, the registrant submitted a protocol ( S. Knizner, 6/ 11/ 93) and a rebuttal to the review of the protocol ( R. Perfetti, 10/ 20/ 93). The Agency concluded that residue data are not required for sorghum flour or starch, but data are required for the aspirated grain fractions of sorghum. Based on this previous HED determination, a sorghum processing study is not required for reregistration. Data on sorghum grain dusts have been submitted and reviewed; these data are presented under " Aspirated grain fractions" section of Miscellaneous Commodities.

Soybean MRID 43814102 ( DP Barcodes D223283, ... 7/ 29/ 96; S. Knizner, W. Dykstra, and C. Lewis)

Established tolerance( s): A tolerance of 13 ppm has been established for the combined residues of dicamba and its two metabolites ( 5 OH dicamba and DCSA) in soybean hulls [ 40 CFR § 180.227 ( a)( 3)]. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 64 of 94 Conclusions: An acceptable soybean processing study with dicamba, submitted as an alternate to previous data generated by Craven Laboratories, is available. The results indicate that residues of dicamba concentrated by a factor of 3.8x in soybean hulls but did not concentrate in any of the other soybean processed fractions ( meal, crude oil and refined oil). The HAFT combined residues from the two soybean field studies, reflecting both the preplant and preharvest uses at 2.5 lb ae/ A ( 1.25x), are: 3.6 ppm ( MRID 43814101) and 7.44 ppm ( MRID 44089307). When the HAFT combined residue level ( 7.44 ppm) is multiplied by the observed concentration factor for soybean hulls ( 3.8x), the resulting level is 28.272 ppm which suggests that the existing tolerance of 13.0 ppm for soybean hulls needs increasing. For the purpose of tolerance reassessment, HED recommends that the tolerance for soybean hulls be increased from 13.0 ppm to 30.0 ppm. Tolerances in the soybean processed fractions of meal and refined oil are not necessary.

Discussion of data: In the subject study ( MRID 43814102), soybeans grown in IL were harvested five days following a single preharvest broadcast application of a formulation containing the DMA salt of dicamba at 10 lb ae/ A ( 5x). Soybean seeds were harvested, and the collected samples were frozen and shipped to Texas A & M Food Protein Research and Development for processing according to simulated commercial procedures. RAC samples were processed into crude and refined oil, meal, hulls and soapstock; aspirated grain fractions were also collected.

The treated soybean seed ( RAC) bore average residues of 0.543 ppm for dicamba, < 0.01 ppm for 5 OH dicamba, and 0.014 ppm for DCSA. Following processing, the average residues of the parent and its metabolites in the processed fractions were: ( i) meal ( 0.190 ppm dicamba + < 0.01 ppm 5 OH dicamba + < 0.01 ppm DCSA); ( ii) hulls ( 2.088 ppm dicamba + < 0.01 ppm 5 OH dicamba + < 0.01 ppm DCSA); ( iii) crude oil (< 0.01 ppm dicamba + < 0.01 ppm 5 OH dicamba + < 0.01 ppm DCSA); and ( iv) refined oil (< 0.01 ppm dicamba + < 0.01 ppm 5 OH dicamba + < 0.01 ppm DCSA). Samples were analyzed by a GC/ ECD method ( Method AM 0941 1094 0). The data collection method is adequate based on acceptable concurrent method recoveries. Samples were stored frozen before residue analysis. Total storage intervals between harvest and analysis were approximately 6 months for seed, 5 months for meal, 5 6 months for hulls, and 4 months for refined oil. These storage intervals are supported by adequate storage stability data. The study also included data on the aspirated grain fractions of soybeans. The results of this portion of study are presented under " Aspirated Grain Fractions" section of Miscellaneous Commodities.

Sugarcane MRID 43245204 ( DP Barcodes D204488, D204809, and D209229; 7/ 14/ 97; L. Cheng)

Established tolerance( s): A tolerance of 2.0 ppm has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in sugarcane molasses [ 40 CFR § 180.227 ( a)( 1)].

Conclusions: Pending submission of supporting storage stability data and adjustment of tolerance level for sugarcane molasses, an adequate sugarcane processing study is available. The study results show that the combined residues of dicamba and 5 OH dicamba were 0.054 ppm in/ on the RAC ( sugarcane) harvested 130 days following a single broadcast application of the DMA salt formulation of dicamba to sugarcane at layby at a rate of 5.0 lbs ae/ A ( 1.8x). Following processing of treated RAC samples, the combined residues were nondetectable (< 0.01 ppm) in Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 65 of 94 refined sugar but concentrated in bagasse ( processing factor of 6.6x) and molasses ( processing factor of 24.4x); bagasse has been deleted from Table 1 of OPPTS 860.1000 as a significant livestock feed item and is no longer regulated.

The initial HED review of the subject processing study previously reported that in PP# 1F2569, the HAFT was 0.036 ppm ( Accession # 070319, Belle Glade, FL, 3 lb ae/ A and PHI of 158 days). A more recent sugarcane field study ( MRID 44089302) reported a combined HAFT residue of 0.183 ppm from RAC samples harvested 87 173 days following a single layby application of the DGA salt formulations at 2.0 lb ae/ A. When the maximum HAFT combined residue level ( 0.183 ppm) is multiplied by the observed concentration factor for molasses ( 24.4x), the resulting level is 4.465 ppm which is higher than the currently established tolerance of 2.0 ppm for sugarcane molasses. For the purpose of tolerance reassessment, HED recommends that the tolerance for sugarcane molasses be increased from 2.0 ppm to 5.0 ppm. A tolerance in refined sugar is not necessary.

Discussion of data: A sugarcane processing study ( MRID 43245204) depicting magnitude of the residues of dicamba and 5 OH dicamba is available. To generate samples for processing, two trials were conducted in Opelousas ( 1) and Washington ( 1), LA. At each trial site, a single broadcast application of the DMA salt formulation of dicamba was applied at 5.0 lbs ae/ A ( 1.8x) to sugarcane at layby. Applications were made in 10 and 11.6 GPA. RAC samples from both sites were harvested and analyzed by Sandoz Agro, Inc. ( Des Plaines, IL) as prequalifier samples. Residues in the RAC ( 130 day PTI) sample collected from the Washington, LA trial were higher, and this sample was the only one processed. The RAC sample was processed within 15 days of harvest following standard commercial practices into bagasse, molasses, and refined sugar by the Audubon Sugar Institute at Louisiana State University in Baton Rouge.

Samples were analyzed for residues of dicamba and its hydroxy metabolite using GC/ ECD method AM 0691B 0593 3. The validated LOQ is 0.02 ppm for dicamba and 5 OH dicamba. The LOD is 0.01 ppm. The method is adequate for data collection based on acceptable concurrent method recovery data. The RAC and processed samples were stored frozen (< 1 ° C) for up to 58 and 64 days, respectively, prior to analysis. The available storage stability data are adequate to support the storage interval and conditions for refined sugar. However, the HED review required supporting storage stability data for molasses before the study may be deemed acceptable.

The results show that the combined residues of dicamba and 5 OH dicamba were 0.054 ppm in/ on the RAC ( sugarcane) harvested 130 days following a single broadcast application of the DMA salt formulation of dicamba at 5.0 lbs ae/ A ( 1.8x) to sugarcane at layby. Following processing of treated RAC, the combined residues were nondetectable (< 0.01 ppm) in refined sugar but concentrated in bagasse ( processing factor of 6.6x) and molasses ( processing factor of 24.4x); bagasse has been deleted from Table 1 of OPPTS 860.1000 as a significant livestock feed item.

The submitted sugarcane processing study is adequate, pending submission of adequate supporting storage stability data for sugarcane molasses. The initial HED review of the subject processing study previously reported that in PP# 1F2569, the HAFT was 0.036 ppm ( Accession # 070319, Belle Glade, FL, 3 lb ae/ A and PHI of 158 days). A more recent sugarcane field study Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 66 of 94 ( MRID 44089302) reported a maximum combined HAFT residue of 0.183 ppm from RAC samples harvested 87 173 days following a single layby application of the DGA salt formulations at 2.0 lb ae/ A. When the maximum HAFT combined residue level ( 0.183 ppm) is multiplied by the observed concentration factor for molasses ( 24.4x), the resulting level is 4.465 ppm which is higher than the currently established tolerance of 2.0 ppm for sugarcane molasses. For the purpose of tolerance reassessment, HED recommends that the tolerance for sugarcane molasses be increased from 2.0 ppm to 5.0 ppm. A tolerance in refined sugar is not necessary.

Wheat MRID 40663801( DEB Nos. 3968, 3969, 4018, and 4019; 11/ 4/ 88; F. Griffith) MRID 42675901 ( DP Barcodes D189039, D189041, and D189043; 4/ 23/ 93, L. Cheng)

Established tolerance( s): No tolerance has been established for the combined residues of dicamba and its metabolite ( 5 OH dicamba) in/ on any wheat processed commodities.

Conclusions: Two wheat processing studies with dicamba have been submitted and reviewed. The first study ( MRID 40663801) was initially deemed ( DEB Nos. 3968, 3969, 4018, and 4019; 11/ 4/ 88; F. Griffith) inadequate because the wheat grain samples that were used for processing did not have sufficient residues and, therefore, any concentration of residues ( if any) in the processed fractions could not be reliably estimated. The Dicamba SRR, independent of the 11/ 4/ 88 review, cited concentration of dicamba residues ( 2x) in wheat processed fractions ( other than flour) and requested registrants to propose a tolerance for wheat processed fractions ( other than flour). Based on the results of this study, the Dicamba SRR allowed translation of the wheat processing data to barley and oats.

A second wheat processing study ( MRID 42675901) was later submitted and deemed adequate ( DP Barcodes D189039, D189041, and D189043; 4/ 23/ 93, L. Cheng). The results show that the combined residues of dicamba and 5 OH dicamba did not concentrate in any of the wheat processed fractions. Thus, tolerances in the wheat processed fractions ( bran, flour, middlings, shorts, and germs) are not necessary.

Discussion of data: In a wheat processing study ( MRID 42675901), the K salt of dicamba ( Banvel K+ SL) was applied as a spray to wheat when the crop was at the hard dough stage at a rate of either 0.25 lb ai/ A ( 0.25x) or 0.125 lb ai/ A ( 1.25x). The wheat plants were harvested 14 days later, and the harvested grains were processed into bran, middlings, shorts and germ, and patent flour using procedures simulating commercial practices. Only treated samples from the 1.25x rate were analyzed. The treated whole wheat grain ( RAC) bore residues of 0.440 ppm for dicamba and 0.034 ppm for 5 OH dicamba. Following processing, residues of the parent and its metabolite were measurable but did not increase in any of the processed fractions. Residues in the processed fractions were: ( i) bran ( 0.436 ppm dicamba + 0.037 ppm 5 OH dicamba); ( ii) middlings ( 0.070 ppm dicamba + < 0.01 ppm 5 OH dicamba); ( iii) shorts & germ ( 0.236 ppm dicamba + 0.030 ppm 5 OH dicamba); and ( iv) patent flour ( 0.023 ppm dicamba + < 0.01 ppm 5 OH dicamba). Samples were analyzed by a GC method with either EC or HECD detection ( Method AM 0691B). The data collection method is adequate and is well supported by the concurrent method recovery data where control samples of wheat fractions were fortified with Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 67 of 94 dicamba and its plant metabolite, each at 0.01 and 0.1 ppm. Samples were stored frozen for about 4 months before residue analysis. This storage interval is supported by adequate storage stability data The reregistration requirement for data on the aspirated grain fractions of wheat are discussed under " Aspirated Grain Fractions" section of Miscellaneous Commodities.

860.1650 Submittal of Analytical Reference Standards Analytical standards for dicamba acid, DMA salt of dicamba, and Na salt of dicamba are currently available ( as of 5/ 6/ 2005) in the National Pesticide Standards Repository; however, no standards are available for 5 OH dicamba and DCSA. Analytical reference standards of dicamba and its regulated metabolites must be supplied, and supplies replenished as requested by the Repository. The reference standards should be sent to the Analytical Chemistry Lab, which is located at Fort Meade, to the attention of either Theresa Cole or Frederic Siegelman at the following address:

USEPA National Pesticide Standards Repository/ Analytical Chemistry Branch/ OPP 701 Mapes Road Fort George G. Meade, MD 20755 5350 ( Note that the mail will be returned if the extended zip code is not used.)

860.1850 Confined Accumulation in Rotational Crops MRID 41972001 ( DP Barcode D197629, 2/ 16/ 96, L. Cheng) MRID 43698601 ( DP Barcodes D228694 and D239967, 6/ 25/ 98, S. Chun)

Two confined rotational crop studies with dicamba are available.

The first study ( MRID 41972001) was deemed inadequate because the test substance, uniformly ring labeled [ 14C] dicamba acid, was applied at only 0.5 lb ae/ A which is 0.5x the maximum rate of 1.0 lb ae/ A for cereal grains or 0.25x the maximum rate of 2.0 lb ae/ A for pasture and rangeland grasses; see Use Closure Memorandum for Dicamba In Table 4. The possibility of obtaining rotational crop commodity samples with sufficient radioactive residues ( e. g., at the 131 and 369 day plantback interval) may have been compromised as a result of the < 1x application rate. Furthermore, the reported results of the characterization and identification of radioactive residues, using samples from the 32 day plantback interval, are inconclusive since details and quantitative raw data ( e. g., material balance to account for the radioactivity in extractable and non extractable fractions as well as sample chromatograms) were not provided. The Agency review of this study required a new confined rotational crop study since upgrading the study by further analyses on stored samples is not feasible because the study was initiated in 1986.

A new confined rotational crop study ( MRID 43698601) was subsequently submitted. The HED review of this study noted two major deficiencies: ( i) the test material was applied to growing corn plants instead of bare ground as specified in OPPTS Guideline 860.1850; and ( ii) carrot tops were not sampled. The first deviation would be expected to effect the quantitative aspects of the Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 68 of 94 study since the plants would prevent an unknown percentage of the test substance from reaching the soil; i. e., the actual application rate is unknown. Carrot tops should have been sampled as they are a representative of the root crop group and there are some members of this which have edible foliage. However, the HED review concluded that the study need not be repeated because the TRR values at the plantback interval of 120 days, which the registrant wishes to support, were very low and were found to be associated with natural products. It is, thus, unlikely that the addition of the test material intercepted by the corn plants would result in significant residues of metabolites or that residues would be significantly different in carrot tops from those in the other RACs. A brief summary of the reviewed confined rotational crop study is presented below.

Uniformly ring labeled [ 14C] dicamba was applied to corn plants at 0.75 lb ai/ A when the plants were at the two to three leaf stage. At 30 and 120 days after treatment ( DAT), corn was removed prior to planting barley, carrots, and collards. For the 365 DAT plantings, corn was harvested at maturity ( 160 DAT). At 365 DAT, soybeans were planted. The crops were grown to maturity and harvested. The raw agricultural commodities ( RACs) harvested for radiocarbon residue determination at 30, 120, and 365 DAT were barley forage, grain, and straw; carrot roots and collard greens. Data from carrot tops were not included despite EPA's requirement of analysis of the aerial and root portions of root crops. RACs harvested for radioactive residue determination at 365 DAT only were soybean forage, hay, and seed. All RACs were analyzed within 4.5 months of harvest, obviating the storage stability data requirement. Total radioactive residue levels in plant samples are listed in Table 7.

Table 7. Total Radioactive Residue of [ 14C] Dicamba in Rotational Crops ( MRID 43698601).

RAC TRR in Rotational Crop RACs in ppm1 30 DAT 120 DAT 365 DAT Barley forage 4.741 ( 80) 0.036 ( 177) BLD2 ( 419)

Barley straw 9.487 ( 129) 0.027 ( 259) 0.008 ( 463)

Barley grain 0.272 ( 129) 0.022 ( 259) 0.009 ( 463)

Collard greens 0.026 ( 126) 0.007 ( 209) BLD2 ( 434)

Carrot roots 1.022 ( 171) 0.005 ( 260) BLD2 ( 463)

Soybean forage NA3 NA3 0.006 ( 497)

Soybean hay NA3 NA3 BLD2 ( 518)

Soybean seed NA3 NA3 BLD2 ( 583)

1 In parenthesis is the number of days from dicamba treatment to harvest for the RAC/ plantback interval combination indicated. 2 Below limit of detection. 3 Not applicable.

Because TRRs as high as 9.5 ppm were found in the 30 DAT plantback interval samples, the registrant is requesting a 120 DAT plantback interval without tolerances. Table 7 shows that the TRRs for all rotational crop RACs planted 120 and 365 DAT were # 0.036 and < 0.01 ppm, respectively. Ordinarily, when residues are < 0.01 ppm, no further characterization of the residue is required. Hence, no characterization is needed for any of the 365 DAT samples or the 120 DAT collard green or carrot root samples. However the TRRs for the barley grain, forage, and Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 69 of 94 hay were all > 0.01 ppm, requiring determination of the composition of the TRR. This was accomplished by subjecting samples to acetonitrile extraction ( to obtain extractable residues) and acid/ base hydrolysis steps ( to obtain bound residues). The results of the extraction profile for 120 DAT barley forage, grain, and straw indicate that approximately 35 52% of TRRs are associated with natural plant constituents ( lignin and cellulose).

860.1900 Field Accumulation in Rotational Crops Limited and/ or extensive field accumulation studies with dicamba need not be conducted and rotational crop tolerances need not be established provided the registrants are willing to amend all dicamba labels with food/ feed use claims to specify a 120 day plantback interval when dicamba is applied at a maximum seasonal rate of 0.75 lb ae/ A or less. At application rates of 0.75 2.0 lb ae/ A, the labels should specify that only crops with established tolerances can be rotated.

The results of the available confined rotational crop study showed that at a plantback interval of 120 days, the total radioactive residues were < 0.01 ppm in/ on samples of collard greens ( a representative of leafy vegetables) and carrots ( a representative of root crops) but were > 0.01 ppm in the matrices of barley ( a representative of small grains). Residue characterization of barley matrices from the 120 day rotation showed that a good percentage of TRR was associated with natural plant constituents. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 70 of 94 TOLERANCE REASSESSMENT SUMMARY The established tolerances for dicamba are listed in 40 CFR § 180.227. There are three dicamba tolerance expressions. Under 40 CFR § 180.227 ( a)( 1), the tolerances are expressed in terms of the combined residues of the herbicide dicamba ( 3,6 dichloro o anisic acid) and its metabolite 3,6 dichloro 5 hydroxy o anisic acid. The tolerances listed in 40 CFR § 180.227 ( a)( 2) are expressed in terms of the combined residues of dicamba and its metabolite 3,6 dichloro 2 hydroxybenzoic acid. Finally, the tolerances listed in 40 CFR § 180.227 ( a)( 3) are expressed in terms of the combined residues of dicamba and its metabolites 3,6 dichloro 5 hydroxy o anisic acid and 3,6 dichloro 2 hydroxybenzoic acid.

The results of plant and animal metabolism studies suggest that the various tolerance expressions for dicamba are appropriate. The results of a confined rotational crop study indicate that tolerances need not be established for rotational crops pending label revisions to specify appropriate rotational crop restrictions.

A summary of the tolerance reassessment and recommended modifications in commodity definitions for dicamba is presented in Table 8.

Tolerances Established Under CFR § 180.227 ( a)( 1)

Pending label revisions and/ or adjustment of tolerances, there are adequate residue data to reassess the tolerances for: barley, grain, hay, and straw; corn, field, grain, forage, and stover; grass forage and hay; wheat grain, straw, forage and hay; and sorghum grain, forage, and stover.

The submitted data for several commodities do not support the established tolerances because they do not reflect the maximum use rates listed in Dicamba Master Use Profile. To fulfill reregistration requirements, the registrant are required to submit additional data. In lieu of submitting additional data, the registrants are given the option to rely on the available data provided they revise their product labels for consistency with the reviewed data.

HED will allow the translation of available/ requested data from some crop commodities to agronomically related commodities with identical uses. Where this situation exists, any HED recommendations with regards to label revision and tolerance reassessment should apply to both crop commodities. The following translations have been made in this Residue Chemistry Chapter: ( i) data from field corn grain and stover may be translated to pop corn grain and stover; ( ii) data from wheat grain may be translated to proso millet grain and rye grain; ( iii) data from wheat forage, hay, and straw may be translated to oat forage, hay, and straw; and ( iv) data from wheat straw may be translated to proso millet straw.

Pending submission of supporting storage stability data, an acceptable sugarcane processing study is available to reassess the established tolerance for sugarcane molasses. When the maximum HAFT combined residue level ( 0.183 ppm) of the RAC is multiplied by the observed concentration factor for sugarcane molasses ( 24.4x), the resulting level is 4.465 ppm which is higher than the current tolerance of 2.0 ppm. Based on these data, HED recommends that the Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 71 of 94 tolerance for sugarcane molasses be increased from 2.0 ppm to 5.0 ppm, toxicological considerations permitting.

The Agency no longer considers sugarcane forage and fodder to be significant livestock feed items, and these items have been deleted from Table 1 of OPPTS 860.1000. Therefore, the respective tolerances should be revoked.

The generic " corn, forage" tolerance should be revoked since a separate tolerance for field corn forage is established. The generic " corn, stover" tolerance should be revoked since separate tolerances are established for field corn stover and pop corn stover. The generic " corn, grain" tolerance should be split into: " corn, field, grain" and " corn, pop, grain".

Tolerances Needed Under CFR § 180.227 ( a)( 1)

Tolerances are needed for proso millet forage and hay. The available/ requested data for wheat forage and hay may be translated to proso millet forage and hay.

Tolerances are needed for rye grain, forage, and straw. The available/ requested data for wheat grain, forage, and straw may be translated to rye grain, forage, and straw.

Tolerances Established Under CFR § 180.227 ( a)( 2)

Pending label revisions and/ or adjustment of tolerance, there are adequate data to reassess the established tolerance for asparagus.

A ruminant feeding study conducted at a dosing level of 1000 ppm is under review. Assuming this study is adequate sufficient data are available to reassess the established ruminant tolerances.

Tolerances Established Under CFR § 180.227 ( a)( 3)

There are adequate data to reassess the tolerances for soybean seed and soybean hulls.

An acceptable soybean processing study is available to reassess the established tolerance for soybean hulls. When the HAFT combined residue level ( 7.44 ppm) for the RAC is multiplied by the observed concentration factor for soybean hulls ( 3.8x), the resulting level is 28.272 ppm which suggests that the existing tolerance of 13.0 ppm needs an upward adjustment. Based on these data, HED recommends that the tolerance for soybean hulls be increased from 13.0 ppm to 30.0 ppm.

There are adequate residue data on the aspirated grain fractions of sorghum, soybean, and wheat and may be translated to corn.

Tolerances That May Be Needed Under CFR § 180.227 ( a)( 3) It is the current Agency policy to allow label restrictions on the feeding/ grazing of livestock animals on soybean forage and hay, thus, precluding the need for residue data and tolerances for Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 72 of 94 these soybean commodities. HED defers to RD for verifying whether such restrictions exist on product labels. If such restrictions appear on the labels, then residue data and tolerances for soybean forage and hay are not necessary. If no such restrictions appear on the labels, then the registrants are required to propose tolerances for soybean forage and hay; based on the available data, a tolerance level of 0.1 ppm would be appropriate for each soybean commodity. Concomitant with these tolerance proposals, the registrants are required to propose a maximum seasonal rate of 0.5 lb ae/ A for preplant application on soybean grown for forage and hay only.

Pending Tolerance Petition:

PP# 6E06209: Interregional Research Project No. 4 ( IR 4) has submitted a petition, on behalf of the Agricultural Experiment Stations of MN, ND and WI, proposing the following permanent tolerances for the combined residues of the herbicide dicamba and its 5 hydroxy ( 5 OH) metabolite ( 3,6 dichloro  5 hydroxy o anisic acid) in/ on: sweet corn forage at 1.0 ppm, fresh sweet corn at 0.1 ppm, and sweet corn stover at 1.0 ppm. HED's evaluation of residue data and analytical methods ( DP Barcode D275611, 7/ 26/ 2001, G. Kramer) concluded that additional field residue trials need to be conducted and a revised Section F must be submitted before a favorable recommendation can be made.

Codex/ International Harmonization No Codex MRLs have been established for dicamba; therefore, issues of compatibility between Codex MRLs and U. S. tolerances do not exist. Compatibility cannot be achieved with the Canadian negligible residue limits or with Mexican MRLs because these levels are expressed in terms of parent compound only. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 73 of 94 Table 8. Tolerance Reassessment Summary for Dicamba.

Commodity Current Tolerance ( ppm) Reassessed Tolerance ( ppm) Comments/

Correct commodity definition Dicamba Tolerances Listed Under 40 CFR § 180.227 ( a)( 1)

[ Expressed in terms of the combined residues of dicamba and its metabolite 3,6 dichloro 5 hydroxy o anisic acid]

Barley, grain 6.0 6.0 Barley, hay 2.0 2.0 Barley, straw 15.0 15.0 Corn, field, forage 3.0 3.0 The combined residues ranged from < 0.01 to 2.27 ppm in/ on field corn forage harvested 39 71 days following the last of three sequential treatments for a total of 2.75 lb ae/ A. The combined residues ranged from < 0.01 to 2.45 ppm in/ on field corn fodder harvested 66 123 days following same sequential treatments.

Corn, field, stover 3.0 3.0 Corn, forage 0.5 Revoke The generic " corn, forage" tolerance should be revoked since a separate tolerance for field corn forage is established.

Corn, grain 0.5 0.1 The combined residues ranged from < 0.01 to 0.015 ppm in/ on field corn grain samples harvested 69 123 days following the last of three sequential treatments for a total of 2.75 lb ae/ A. The generic " corn, grain" tolerance should be split into: " corn, field, grain"; and " corn, pop, grain".

Corn, pop, stover, 3.0 3.0 HED will allow the translation of available data for field corn stover to pop corn stover. Any label revision for field corn should also be made for pop corn.

Concurrently, any adjustment to the field corn stover tolerance should also be applied as necessary to the pop corn stover tolerance.

Corn, stover 0.5 Revoke The generic " corn, stover" tolerance should be revoked since separate tolerances are established for field corn stover and pop corn stover.

Cotton, undelinted seed 5.0 TBD Cotton, meal 5.0 TBD Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 Table 8. Tolerance Reassessment Summary for Dicamba.

Commodity Current Tolerance ( ppm) Reassessed Tolerance ( ppm) Comments/

Correct commodity definition 74 of 94 Crop Group 17 ( grass forage, fodder, and hay) The combined residues ranged 66 358 ppm in/ on grass forage samples harvested immediately ( 0 day) following a single application at 2.0 lb ae/ A ( 1x). The combined residues ranged 25 201 ppm in/ on grass hay samples harvested 7 days following a single application 1x. Based on these data, HED is reassessing the grass forage tolerance at 400 ppm and the grass hay tolerance at 250 ppm.

Concomitant with the reassessment of these tolerances, HED is requesting RD to verify that all dicamba labels specify a 0 day PHI/ PGI for grass forage and a 7

day PHI for grass hay when applied at a maximum of 2.0 lb ae/ A.

 Grass forage 125.0 400  Grass hay 200.0 250 Millet, proso, grain 0.5 2.0 HED will allow the translation of available/ requested data for wheat grain and straw to proso millet grain and straw since the Dicamba Master Use Profile indicates that the application rate for wheat is higher than millet.

Millet, proso, straw 0.5 TBD Oat, grain 0.5 TBD HED will allow the translation of available/ requested data for wheat grain to oat grain since the Dicamba Master Use Profile indicates that the application rate of the two crops is identical.

Oat, forage 80.0 2.0 HED will allow the translation of available/ requested data for wheat forage, hay,

and straw to oat forage, hay, and straw since the Dicamba Master Use Profile indicates that the application rate of the two crops is identical.

Oat, hay 20.0 TBD Oat, straw 0.5 30 Sorghum, grain 3.0 4.0 The maximum combined residues were 2.73 ppm ( MRID 43245203) and 3.164 ppm ( MRID 44089306) in/ on sorghum grain harvested 30 42 days following sequential treatments for a total rate of 0.5 lb ae/ A ( 1x the maximum rate listed in the Dicamba Master Use Profile). These data suggest that the established tolerance for sorghum grain may be too low. Based on the reviewed data, HED is recommending a tolerance level of 4.0 ppm for sorghum grain concomitant with label revision to specify a 30 day PHI. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 Table 8. Tolerance Reassessment Summary for Dicamba.

Commodity Current Tolerance ( ppm) Reassessed Tolerance ( ppm) Comments/

Correct commodity definition 75 of 94 Sorghum, forage 3.0 0.5 The maximum combined residues were 0.46 ppm ( MRID 43245203) and 0.350 ppm ( MRID 44089306) in/ on sorghum forage samples harvested 20 72 days following a single postemergence application at 0.25 lb ae/ A ( 0.5x the seasonal rate listed in the Dicamba Master Use Profile). The maximum combined residues were 8.22 ppm ( MRID 43245203) and 4.29 ppm ( MRID 44089306)

in/ on sorghum fodder ( stover) samples collected at PHIs of 30 42 days following the last of two applications for a total rate of 0.5 lb ae/ A ( 1x). These data suggest that the established tolerance for sorghum forage may be too high and the tolerance for fodder too low. Based on these data, HED is recommending tolerance levels of 0.5 ppm for sorghum forage and 10.0 ppm for sorghum stover concomitant with the following recommended label revisions: ( i) a 20 day PHI and a maximum single/ seasonal rate of 0.25 lb ae/ A for sorghum forage; and ( ii)

a 30 day PHI for sorghum fodder ( stover) at a maximum seasonal rate of 0.5 lb ae/ A.

Sorghum, grain, stover 3.0 10 Sugarcane, cane 0.1 TBD 1 The available data do not support the maximum seasonal single/ yearly rate of 2.8 lb ae/ A that is listed in the Dicamba Master Use Profile because the sugarcane trials were conducted at an application rate of 2.0 lb ae/ A. The maximum combined residues were 0.202 ppm in/ on sugarcane harvested 87 173 days following a single layby application at 2.0 lb ae/ A.

The registrants are required to submit additional data on sugarcane reflecting a maximum single/ yearly rate of 2.8 lb ae/ A. Alternatively, the registrants may rely on the available data provided they are willing to revise their product labels for consistency with the reviewed data. If the registrants elect to choose the latter option, then they will be required to revise product labels to specify a maximum seasonal rate of 2.0 lb ae/ A and an 87 day PHI for sugarcane. Based on the reviewed data, the existing tolerance of 0.1 ppm for sugarcane is too low,

and HED is recommending that it be reassessed at 0.3 ppm if the registrants elect to revise product labels as detailed above.

Sugarcane, fodder 0.1 Revoke These items are no longer regulated and have been removed from Table 1 of OPPTS 860.1000.

Sugarcane, forage 0.1 Revoke Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 Table 8. Tolerance Reassessment Summary for Dicamba.

Commodity Current Tolerance ( ppm) Reassessed Tolerance ( ppm) Comments/

Correct commodity definition 76 of 94 Sugarcane, molasses 2.0 5.0 When the maximum HAFT combined residue level ( 0.183 ppm) of the RAC is multiplied by the observed concentration factor for sugarcane molasses ( 24.4x),

the resulting level is 4.465 ppm which is higher than the current tolerance of 2.0 ppm. Based on these data, HED recommends that the tolerance for sugarcane molasses be increased from 2.0 ppm to 5.0 ppm, pending submission of supporting storage stability data.

Wheat, forage 80.0 TBD Additional data are currently under review.

Wheat, grain 2.0 2.0 The combined residues were < 0.01 to 0.15 ppm in/ on samples of wheat grain harvested 63 125 days following one spring broadcast application at 0.25 lb ae/ A. The combined residues were 0.039 to 1.4 ppm in/ on grain samples harvested 6 12 days following the last of two treatments for a total of 0.5 lb ae/ A.

Wheat, hay 20.0 TBD Additional data are currently under review.

Wheat, straw 30.0 30.0 The combined residues were 0.011 to 0.97 ppm in/ on samples of wheat straw harvested 63 125 days following one spring broadcast application at 0.25 lb ae/ A. The combined residues were 0.13 to 26 ppm in/ on straw samples harvested 6 12 days following the last of two treatments for a total of 0.5 lb ae/ A.

Dicamba Tolerances Needed Under 40 CFR § 180.227( a)( 1)

Millet, proso, forage None TBD HED will allow the translation of available/ requested data for wheat forage and hay to proso millet forage and hay since the Dicamba Master Use Profile indicates that the application rate for wheat is slightly higher than millet.

Millet, proso, hay None TBD Rye, grain None 2.0 HED will allow the translation of available/ requested data for wheat grain,

forage, and straw to rye grain, forage, and straw since the Dicamba Master Use Profile indicates that the yearly application rate of the two crops is identical.

Rye, forage None TBD Rye, straw None 30.0 Dicamba Tolerances Listed in 40 CFR § 180.227 ( a)( 2)

[ Expressed in terms of the combined residues of dicamba and its metabolite 3,6 dichloro 2 hydroxybenzoic acid] Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 Table 8. Tolerance Reassessment Summary for Dicamba.

Commodity Current Tolerance ( ppm) Reassessed Tolerance ( ppm) Comments/

Correct commodity definition 77 of 94 Asparagus 4.0 4.0 Th combined residues ranged 0.28 3.29 ppm in/ on asparagus samples harvested 24 hours following a single application at 1x the maximum rate listed in the Dicamba Master Use Profile. These data support the currently established tolerance of 4.0 ppm on asparagus pending verification by RD that the label PHI for asparagus is 24 hours or 1 day.

Cattle, fat 0.2 0.3 Reassessed values are based on a new ruminant feeding study currently under review.

Cattle, kidney 1.5 25 Reassessed values are based on a new ruminant feeding study currently under review.

Cattle, liver 1.5 Revoke Residues in liver will be covered by redefined meat by products tolerance.

Cattle, meat byproducts 0.2 3.0 Cattle, meat by products, except kidney. Reassessed values are based on a new ruminant feeding study currently under review.

Cattle, meat 0.2 0.25 Reassessed values are based on a new ruminant feeding study currently under review.

Goat, fat 0.2 0.3 Reassessed values are based on a new ruminant feeding study currently under review.

Goat, kidney 1.5 25 Reassessed values are based on a new ruminant feeding study currently under review.

Goat, liver 1.5 Revoke Residues in liver will be covered by redefined meat by products tolerance.

Goat, meat byproducts 0.2 3.0 Goat, meat by products, except kidney Goat, meat 0.2 0.25 Reassessed values are based on a new ruminant feeding study currently under review.

Hog, fat 0.2 0.3 Reassessed values are based on a new ruminant feeding study currently under review.

Hog, kidney 1.5 25 Reassessed values are based on a new ruminant feeding study currently under review.

Hog, liver 1.5 Revoke Residues in liver will be covered by redefined meat by products tolerance.

Hog, meat byproducts 0.2 3.0 Hog, meat by products, except kidney Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 Table 8. Tolerance Reassessment Summary for Dicamba.

Commodity Current Tolerance ( ppm) Reassessed Tolerance ( ppm) Comments/

Correct commodity definition 78 of 94 Hog, meat 0.2 0.25 Reassessed values are based on a new ruminant feeding study currently under review.

Horse, fat 0.2 0.3 Reassessed values are based on a new ruminant feeding study currently under review.

Horse, kidney 1.5 25 Reassessed values are based on a new ruminant feeding study currently under review.

Horse, liver 1.5 Revoke Residues in liver will be covered by redefined meat by products tolerance.

Horse, meat byproducts 0.2 3.0 Horse, meat by products, except kidney Reassessed values are based on a new ruminant feeding study currently under review.

Horse, meat 0.2 0.25 Reassessed values are based on a new ruminant feeding study currently under review.

Milk 0.3 0.2 Reassessed values are based on a new ruminant feeding study currently under review.

Sheep, fat 0.2 0.3 Reassessed values are based on a new ruminant feeding study currently under review.

Sheep, kidney 1.5 25 Reassessed values are based on a new ruminant feeding study currently under review.

Sheep, liver 1.5 Revoke Residues in liver will be covered by redefined meat by products tolerance.

Sheep, meat byproducts 0.2 3.0 Sheep, meat by products, except kidney Reassessed values are based on a new ruminant feeding study currently under review.

Sheep, meat 0.2 0.25 Reassessed values are based on a new ruminant feeding study currently under review.

Dicamba Tolerances Under 40 CFR § 180.227( a)( 3)

[ Expressed in terms of the combined residues of dicamba and its metabolites 3,6 dichloro 5 hydroxy o anisic acid and 3,6 dichloro 2 hydroxybenzoic acid]

Grain, aspirated grain fractions 5100 1000 There are adequate residue data on the aspirated grain fractions of sorghum,

soybean, and wheat, and can be translated to corn. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 Table 8. Tolerance Reassessment Summary for Dicamba.

Commodity Current Tolerance ( ppm) Reassessed Tolerance ( ppm) Comments/

Correct commodity definition 79 of 94 Soybean, hulls 13.0 30.0 When the maximum HAFT combined residue level ( 7.44 ppm) of the RAC is multiplied by the observed concentration factor for soybean hulls ( 3.8x), the resulting level is 28.272 ppm which suggests that the existing tolerance of 13.0 ppm is too low. HED recommends that the tolerance for soybean hulls be increased from 13.0 ppm to 30.0 ppm.

Soybean, seed 10.0 10.0 The highest total residues were 8.13 ppm in/ on samples of soybean seed harvested 6 8 days following treatments at 1.25x the maximum rate listed in the Dicamba Master Use Profile.

Dicamba Tolerances That May Be Needed Under 40 CFR § 180.227( a)( 3)

Soybean, forage None TBD It is the current Agency policy to allow label restrictions on the feeding/ grazing of livestock animals on soybean forage and hay, thus, precluding the need for residue data and tolerances. HED defers to RD for verifying whether such restrictions exist on product labels. If such restrictions appear on the labels, then residue data and tolerances for soybean forage and hay are not necessary. If no such restrictions appear on the labels, then the registrants are required to propose tolerances for soybean forage and hay; based on the available data, a tolerance level of 0.1 ppm would be appropriate for each soybean commodity.

Concomitant with these tolerance proposals, the registrants are required to propose a maximum seasonal rate of 0.5 lb ae/ A for preplant application on soybean grown for forage and hay.

Soybean, hay None TBD 1 TBD = To be determined. Additional data/ information are required for tolerance reassessment. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 80 of 94 RESIDUE CHEMISTRY BIBLIOGRAPHY FROM OPPIN ( Sorted by MRID)

Study Citations References citations listed below were obtained from a 4/ 20/ 04 search of the Agency's database ( OPPIN bibliography) of study submissions for dicamba acid ( 029801), dimethylamine ( DMA) salt of dicamba ( 029802), sodium ( Na) salt of dicamba ( 029806), isopropylamine ( IPA) salt of dicamba ( 128944), diglycoamine ( DGA) salt of dicamba ( 128931), and potassium ( K) salt of dicamba ( 129043).

00004541 Velsicol Chemical Corporation ( 1974) Summary of Mondak Residue Studies Winter Wheat. ( Unpublished study including Velsicol Report # 147 and # 150, received Dec 11, 1974 under 876 45; CDL: 003548 A)

00004566 Velsicol Chemical Corporation ( 1972) Wheat ( Fall Seeded): Report No. 123. ( Unpublished study received May 21, 1973 under 876 45; prepared in cooperation with Northwestern Agricultural Research Center; CDL: 021027 A)

00015636 Suzuki, H. K.; Whitacre, D. M.; Anderson, R. F. ( 1975) Laboratory Report: Residue Project 74 1 D; Banvel ®   Corn: Report No. 163. ( Unpublished study received Mar 5, 1979 under 876 25; prepared in cooperation with Cal Laboratories, Inc. and ABC Laboratories, Inc., submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 237957 A)

00015637 Suzuki, H. K.; Whitacre, D. M.; Anderson, R. F. ( 1976) Laboratory Report: Residue Project 75 1 D; Banvel ® : Corn Harvest Aid: Report No. 171. ( Unpublished study received Mar 5, 1979 under 876 25; prepared in cooperation with IRDC and ABC Laboratories, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 237957 B)

00015640 Suzuki, H. K.; Whitacre, D. M.; Nickell, L. G. ( 1978) Laboratory Report: Residue Project 77 1 D; Banvel Dual Corn: Report No. 191. ( Unpublished study received Mar 5, 1979 under 876 25; prepared in cooperation with Craven Laboratories, Inc., submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 237957 E)

00015641 Suzuki, H. K.; Whitacre, D. M.; Anderson, R. F. ( 1976) Laboratory Report: Residue Project 75 1 D; Banvel ®   Corn ( No Till): Report No. 173. ( Unpublished study received Mar 5, 1979 under 876 25; prepared in cooperation with Cal Laboratories, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 237957 F) Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 81 of 94 00015642 Suzuki, H. K.; Whitacre, D. M.; Anderson, R. F. ( 1975) Laboratory Report: Residue Project 74 1 D; Banvel ®   Bladex Corn: Report No. 164. ( Unpublished study received Mar 5, 1979 under 876 25; prepared in cooperation with Cal Laboratories, Inc., Purdue Univ. and Univ. of Wisconsin, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 237957 G)

00015786 Chamberlain, E.; Taylor, T. D. ( 1978) Metolachlor, Dual ® 8E; Dicamba, Banvel: AG A No. 4865 I, II. ( Unpublished study received Mar 16, 1979 under 100 583; submitted by Ciba Geigy Corp., Greensboro, N. C.; CDL: 237818 E)

00016435 Houseworth, L. D. ( 1977) Residues of Metolachlor and Dicamba in or on Corn Grain Resulting from Preemergence Tank Mix Applications: Report No. ABR 77071. Summary of studies 232192 B through 232192 D. ( Unpublished study received Nov 10, 1977 under 100 EX 59; submitted by Ciba Geigy Corp., Greensboro, N. C.; CDL: 232192 A)

00016436 Chamberlain, E.; Coan, R. M. ( 1977) Residue Report: Field Corn: AG A No. 4253 II. ( Unpublished study received Nov 10, 1977 under 100 EX 59; prepared in cooperation with Velsicol Chemical Corp., submitted by Ciba Geigy Corp., Greensboro, N. C.; CDL: 232192 B)

00016437 Chamberlain, E.; Kern, C. L. ( 1977) Residue Report: Field Corn: AG A No. 4264 II. ( Unpublished study received Nov 10, 1977 under 100 EX 59; prepared in cooperation with Velsicol Chemical Corp. and Craven Laboratories, submitted by Ciba Geigy Corp., Greensboro, N. C.; CDL: 232192 C)

00016438 Chamberlain, E.; Taylor, T. D. ( 1977) Residue Report: Field Corn: AG A No. 4270 III. ( Unpublished study received Nov 10, 1977 under 100 EX 59; prepared in cooperation with Velsicol Chemical Corp. and Craven Laboratories, submitted by Ciba Geigy Corp., Greensboro, N. C.; CDL: 232192 D)

00022612 Fletchall, O. H.; Rues, O. G.; Probst, N.; et al. ( 1970) Residue Results: Summary. ( Unpublished study received Jun 10, 1971 under 876 25; submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 005045 I)

00022613 Suzuki, H. K.; Jolliffe, V. A.; Polen, P. B.; et al. ( 1970) Residue Project 70 6H: Banvel Atrazine Corn: Report No. 29. ( Unpublished study received May 19, 1970 under 876 25; submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 004523 B)

00022618 Staniforth, D.; Fletchall, O. H.; Stroube, E.; et al. ( 1965) [ Efficacy Study of Dicamba and other Herbicides on Corn]. ( Unpublished study received Mar 11, 1965 under 876 25; prepared in cooperation with Iowa State Univ. and others, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 022213 A) Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 82 of 94 00022622 Woofter, D.; Appleby, A. P.; Watson, V. H.; et al. ( 1972) [ Chemical Sprays on Corn, Sorghum and Wheat]. ( Unpublished study received Jan 3, 1973 under 876 25; prepared in cooperation with Oregon State Univ. and others, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 005052 C)

00022745 Leonard, O. A.; lider, L. A.; Glenn, R. K. ( 1965) Absorption and Translocation of Herbicides by Thompson Seedless ( Sultanina) Grape, Vitis vinifera L. ( Unpublished study received Aug 30, 1965 under 6F0466; prepared by Univ. of California Davis, Depts. of Botany and Viticulture and Enology, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 090517 AT)

00022753 Quinn, R. M.; Bingham, W. ( 1965) Translocation of Dicamba in Herbaceous Plants. ( Unpublished study received Aug 30, 1965 under 6F0466; prepared by Big Sandy High School ( Montana) in cooperation with Virginia Polytechnic Institute and State Univ., submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 090517 BG)

00023584 Aschoff, J.; Shephard, D.; Shephard, D.; et al. ( 1973) Residue Results. ( Unpublished study received Feb 15, 1974 under 876 25; prepared in cooperation with Purdue Univ. and others, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 022193 D)

00023684 Velsicol Chemical Company ( 1965) [ Corn: Banvel D Residue ( Uncorrected Basis) Preemergent Treatment]: TSR No. F 35. ( Unpublished study including TSR nos. F 45, F 43, F 43A..., received Mar 11, 1965 under 876 25; CDL: 120179 A)

00023687 Rydrych, D.; Behrens, R.; Wallace, K.; et al. ( 1972) [ Residues from Various Chemicals on Grains]. ( Unpublished study received Jan 3, 1973 under unknown admin. no.; prepared in cooperation with Univ. of Minnesota and others, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 120182 A)

00025330 Suzuki, H. K.; Fenster, C. R. ( 1976) Dicamba: Residue Tolerance Petition Proso Millet. ( Unpublished study received Jan 24, 1979 under 9E2166; prepared in cooperation with Univ. of Nebraska, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 097773 A)

00025338 Klausen Rogers, G.; Renfrow, J.; Slater, L.; et al. ( 1970) Residue Results: [ Dicamba]. ( Unpublished study received Jun 15, 1973 under 1F1131; prepared in cooperation with Del Monte Corp. and others, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 090907 F)

00025344 Diaz, L. I.; Schwemmer, B. A. ( 1973) Radiotracer Study of Dicamba on Asparagus: Report No. 40400, No. 124. ( Unpublished study received Jun 15, 1973 under 1F1131; submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 090907 N) Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 83 of 94 00025364 Bodnarchuk, D.; Laporta, M.; Potts, C.; et al. ( 1975) Summary Prowl and Banvel Residues in Corn Plants. ( Unpublished study received Dec 23, 1975 under 241 243; submitted by American Cyanamid Co., Princeton, N. J.; CDL: 223338 A)

00025383 Suzuki, H. K.; Behrens, R.; Kilmer, D. ( 1975) Residue Chemistry: [ Dicamba]. ( Unpublished study including report no. 404000, nos. 174, 176 and 179, received Nov 18, 1976 under 876 255; prepared in cooperation with International Research and Development Corp. and Univ. of Wisconsin, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 226930 A)

00025394 Rydrich, D.; Wallace, K.; Beck, B.; et al. ( 1976) Residue Results: Banvel plus Bromoxynil plus MCPA Tank Mix: Summary. ( Unpublished study received Feb 18, 1976 under 876 25; prepared in cooperation with Oregon State Univ., submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 225197 C)

00028173 Hoffman, C.; Haas, R.; Criswell, T.; et al. ( 1970) Grass: Project No. 404000. ( Unpublished study received Jun 15, 1970 under 876 25; submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 004524 D)

00028200 Tullos, B.; Martin, L.; Morse, R.; et al. ( 1975) Weedmaster Herbicide Residue Data. ( Unpublished study received Oct 2, 1975 under 876 203; prepared in cooperation with Kerr Foundation and others, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 195015 A)

00028252 Velsicol Chemical Corporation ( 1967) Residue Data: Small Grains. ( Unpublished study received Jan 3, 1968 under 8F0666; CDL: 091168 R)

00028263 Velsicol Chemical Corporation ( 1967) Determination of Residue of Dicamba and 5 Hydroxy Dicamba. Undated method AM 0268A; undated method addendum to AM 0268A entitled: Determination of Residues of 3,5 Dichloro o anisic acid. ( Unpublished study received Jan 5, 1968 under 8F0725; CDL: 091252 V)

00028267 Velsicol Chemical Corporation ( 1966) Summary Data Sheet Residue Dissipation Study. ( Unpublished study received Jan 5, 1968 under 8F0725; CDL: 091252 AD)

00028268 Velsicol Chemical Corporation ( 1967) Banvel D Treated Grass: Summary of Residue Data: Report 404000, No. 6. ( Unpublished study including report 16 166 04, nos. 1 3, received Jan 5, 1968 under 8F0725; prepared in cooperation with Texas A & M Univ., Dept. of Range Science; CDL: 091252 AE)

00028269 Velsicol Chemical Corporation ( 1966) Field Corn Banvel ® D Residue ( Uncorrected Basis) Preemergence Treatment. ( Unpublished study received Feb 24, 1966 under unknown admin. no.; CDL: 120183 A) Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 84 of 94 00028398 Collins, R. L.; Appleby, A.; Baldridge, D.; et al. ( 1970) Summary of Dicamba Spot Treatments for Perennial Weed Control in Cropland Rotated to Wheat: Pacific Northwest States. ( Unpublished study including published data, received Jul 13, 1970 under 876 25; prepared in cooperation with Oregon State Univ., Pendleton Branch Experiment Station and others, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 126372 B)

00030701 Suzuki, H. K.; Whitacre, D. M.; Boudreaux, H.; et al. ( 1980) Weed master ® Herbicide on Sugarcane: Residue Data and Processing Studies. ( Unpublished study received Apr 12, 1980 under 876 203; prepared in cooperation with International Research & Development Corp. and T. Lanaux & Sons, submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 242414 B)

00036921 Broadhurst, N. A.; Montgomery, M. L.; Freed, V. H. ( 1966) Metabolism of 2 Methoxy 3,6 dichlorobenzoic acid ( Dicamba) by wheat and bluegrass plants. Journal of Agricultural and Food Chemistry 14( 6): 585 588. ( Also In unpublished submission received Jan 3, 1968 under 8F0666; submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 091168 V)

00055662 Suzuki, H. K.; Whitacre, D. M.; Fraase, E.; et al. ( 1975) Summary: Residues of Dicamba and 2,4 D on Fall Wheat. Includes method dated Oct 30, 1975. ( Unpublished study including report 404000, nos. 156 and 162, received Nov 11, 1976 under 876 44; prepared in cooperation with ABC Labs and International Research and Development Corp., submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 24320 A)

00075715 Velsicol Chemical Corporation ( 1981) [ Residues in Corn]. Includes undated method AM 0691. ( Compilation, unpublished study received Jun 12, 1981 under 876 25; CDL: 245471 B)

00075729 Velsicol ( 1977) ( Banvel and Dicamba in Crops and Soil). ( Compilation; unpublished study received Jun 22, 1981 under CO 81/ 11; CDL: 245581 F)

00077779 Oehler, D. D.; Ivie, G. W. ( 1980) Metabolic fate of the herbicide dicamba in a lactating cow. Journal of Agricultural and Food Chemistry 28( 4): 685 689. ( Also In unpublished submission received Apr 20, 1981 under 876 25; submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 070028 U)

00078448 Velsicol Chemical Company ( 1966) General: [ Dicamba]. Summary of studies 090716 I and 090716 J. ( Unpublished study received Feb 14, 1967 under 7F0568; CDL: 090716 H) Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 85 of 94 00079708 Hurtt, W.; Foy, C. L. ( 19??) Some Factors Influencing the Excretion of Foliarly applied Dicamba and Picloram from Roots of Black Valentine Beans. Taken from: [ Without title]. N. P. ( Abstract 11: 45). ( Page xlviii only; also In unpublished submission received Aug 30, 1965 under 6F0466; submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 090517 AQ)

00079736 Velsicol Chemical Corporation ( 1979) Determination of Dicamba and 5 Hydroxy Dicamba Residues in Vegetables, Forage Crops, Legumes, Cottonseed and Cottonseed Fractions and Grains. Method no. AM 0691 dated Jul 25, 1979. ( Unpublished study received Sep 11, 1981 under 876 25; CDL: 070319 B)

00079738 Velsicol Chemical Corporation ( 1981) Sugarcane Residue Studies. ( Compilation; unpublished study received Sep 11, 1981 under 876 25; CDL: 070319 D)

00079742 Gilsdorf, D. V.; Weissenburger, B. ( 1979) Effect of Feeding Dicamba to Dairy Cattly [ sic] ( Residues in Liver, Kidney, Muscle, and Fat): ADC Project # 379. ( Unpublished study received Sep 11, 1981 under 876 25; prepared by Analytical Development Corp., submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 070319 N)

00079744 Velsicol Chemical Corporation ( 1979) Determination of Dicamba and 3,6 Dichlorosalicylic Acid ( DCSA) in Liver, Kidney, Skeletal Muscle, Adipose Tissue and Milk. Method no. AM 0685 dated May 7, 1979. ( Unpublished study received Sep 11, 1981 under 876 25; CDL: 070319 Q)

00079747 Butz, R. G.; Atallah, Y. H.; Kunkel, J. F.; et al. ( 1981) Metabolic Fate of Dicamba in Sugarcane Plants: Project No. 480068, Report No. 24. ( Unpublished study received Sep 11, 1981 under 876 25; submitted by Velsicol Chemical Corp., Chicago, Ill.; CDL: 070319 T)

00088172 Velsicol Chemical Corporation ( 1981) Discussion of Residue Data. ( Compilation; unpublished study, including project nos. 414698 and 404000, received Dec 2, 1981 under 876 EX 37; CDL: 246330 A)

00088173 Velsicol Chemical Corporation ( 1979) Determination of Dicamba and 5 Hydroxy Dicamba Residues in Vegetables, Forage Crops, Legumes, Cottonseed and Cottonseed Fractions and Grains. Method no. AM 0691 dated Jul 25, 1979. ( Unpublished study received Dec 2, 1981 under 876 EX 37; CDL; 246330 B)

00102944 Velsicol Chemical Corp. ( 1982) The Results of Tests on the Amount of Residue Remaining, Including a Description of the Analytical Method Used: [ Banvel]. ( Compilation; unpublished study received May 20, 1982 under 876 25; CDL: 070876 A) Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 86 of 94 00102945 Butz, R.; Atallah, Y. ( 1982) Foliar Absorption, Metabolism and Translocation of Dicamba by Soybeans at Early Podfill and Late Senescent Stages: Report No. 480068 39. ( Unpublished study received May 20, 1982 under 876 25; submitted by Velsicol Chemical Corp., Chicago, IL; CDL: 070876 B)

00116671 Santos, F.; Butz, R. ( 1982) Dicamba Residues in Milk: Statistical Analysis. ( Unpublished study received Oct 29, 1982 under 876 25; submitted by Velsicol Chemical Corp., Chicago, IL; CDL: 071196 A)

00118473 Velsicol Chemical Corp. ( 1982) The Results of Tests on the Amount of [ Banvel] Residue Remaining, Including a Description of the Analytical Method Used. ( Compilation; unpublished study received Nov 23, 1982 under 876 25; CDL: 071261 A)

00145248 Velsicol Chemical Corp. ( 1984) Foliar Absorption, Metabolism and Translocation of Dicamba; [ Residue of Banvel Herbicide in Cotton and Grain Crops; Toxicology of Contaminants]. Unpublished compilation. 367 p.

00148127 Cahill, W.; Johnson, L. ( 1984) Determination of Dicamba Residue in Laying Hen Tissues and Eggs after a 28 Day Feeding Study: Project No. 480068. Unpublished study prepared by Velsicol Chemical Corp. 98 p.

00149626 Velsicol Chemical Corporation ( 1985) [ Banvel Herbicide Residues in Vegetables, Peanuts and Alfalfa]. Unpublished compilation. 156 p.

00162206 Cahill, W.; Jimenez, N. ( 1986) Analysis of Barley, Corn, Sorghum, Sugar Cane and Wheat Samples for Dicamba and 5 Hydroxy Dicamba Residues: Project No. 480068: Report No. 88. Unpublished compilation. 68 p.

40233501 Armstrong, T.; Jimenez, N.; Cahill, W. ( 1987) Dicamba and 5 Hydroxy Dicamba Levels in Palm Oil: Laboratory Project I. D.: 480068 97. Unpublished compilation prepared by Monsanto Agricultural Co. in cooperation with Sandoz Crop Protection Corp. 160 p.

40547911 Suzuki, H.; Butz, B. ( 1985) Dicamba Residue Stability in Stored Frozen Sample: Laboratory Project ID 480068 82. Unpublished study prepared by Velsicol Chemical Corporation. 20 p 40642801 Butz, R. ( 1988) Uptake, Translocation and Metabolism of Dicamba Herbicide in Cotton after Fallow Application: Project No. 480065; Report No. 9. Unpublished study prepared by Sandoz Crop Protection Corp. 85 p.

40663801 Jimenez, N. ( 1986) Analysis of Wheat and Wheat Processed Fractions for Dicamba and 5 Hydroxy Dicamba Residues: Project No. 480068: Report No. 92. Unpublished study prepared by Sandoz Crop Protection Corp. 37 p. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 87 of 94 41187301 Bade, T. ( 1989) Dicamba Residues in Corn Processing Fractions from a Pre Harvest Application of Banvel: Laboratory Project ID: 480068: Report No. 104. Unpublished study prepared by Sandoz Crop Protection Corporation. 182 p.

41972001 Moore, P.; Butz, R. ( 1988) Confined Accumulation Studies of Dicamba on Rotational Crops After Spring Application: Lab Project Number 480065: 16. Unpublished study prepared by Sandoz Crop Protection Corp. 125 p.

42675901 Bade, T. ( 1990) Dicamba Residues in Wheat Processing Fractions from a Pre harvest Application of Banvel: Lab Project Number: 480068: 105. Unpublished study prepared by Sandoz Crop Protection Corp. 217 p.

42883201 Pfaff, J. ( 1993) Confirmatory Method Trial of the Residue Method, AM 0691B 0593 2, " Determination of Dicamba and 5 Hydroxy Dicamba Residues in Barley, Corn, Cotton, Cotton Processed Fractions, Pasture Grass, Peanut, Sorghum, Soybean, Sugar Cane, Tomato, Tomato Processed Fractions, Wheat and Wheat Processed Fractions ( GC)": Final Report: Lab Project Number: 930901: 05/ 93/ AM. Unpublished study prepared by Chem Analysis Inc. 110 p.

43245201 Guirguis, A.; Yu, C. ( 1994) Metabolism of Dicamba in Lactating Goats: Laboratory Final Report: Lab Project Number: 480065: 28: 114 002 12. Unpublished study prepared by Sandoz Agro, Inc. 156 p.

43245202 Nietschmann, D.; Yu, C. ( 1994) Dicamba: Metabolism in Laying Hens: Laboratory Final Report: Lab Project Number: 480065: 25: DP301493. Unpublished study prepared by Sandoz Agro, Inc. 80 p.

43245203 Laban, S. ( 1994) Crop Residue Study with Dicamba Formulations on Grain Sorghum: Laboratory Final Report: Lab Project Number: 110/ 92/ 10: 480068: 119. Unpublished study prepared by MVTL Laboratories Inc. 684 p.

43245204 Formanski, L. ( 1994) Dicamba Residue Study on Sugar Cane and Sugar Cane Processed Fractions: Laboratory Final Report: Lab Project Number: 105/ 93/ 01: 480068: 129. Unpublished study prepared by Sandoz Agro, Inc. 496 p.

43245205 Rosas, M. ( 1994) Dicamba Residue Study on Sorghum Grain and Sorghum Processed Fractions: Laboratory Final Report: Lab Project Number: 104/ 93/ 01: 104/ 93/ 01 606 02: 480068. Unpublished study prepared by Sandoz Agro, Inc., Beason Ag Research and Diamond Ag Research. 281 p.

43245206 Clouser, A. ( 1994) Crop Residue Study with Dicamba Formulations on Asparagus: Laboratory Final Report: Lab Project Number: 480068: 124: DP 301441. Unpublished study prepared by Sandoz Agro, Inc., Spray Tech and Univ. California Ext. Service. 322 p. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 88 of 94 43274501 Guirguis, M. ( 1994) Crop Residue Study with Dicamba Formulations on Wheat ( Forage & Hay): Final Report: Lab Project Number: 103/ 93/ 01: 480068: 125. Unpublished study prepared by Sandoz Agro, Inc. 740 p.

43370701 Jimenez, N. ( 1994) Crop Residue Study with Dicamba Formulations on Grass Forage and Hay: Final Report: Lab Project Number: 480068: 128: DP/ 301489. Unpublished study prepared by ChemAlysis Inc. 1596 p.

43425803 Clouser, A. ( 1994) Crop Residue Study with Dicamba Formulations on Asparagus: Final Report: Lab Project Number: 480068: 131: DP 301623. Unpublished study prepared by Sandoz Agro, Inc. 590 p.

43461701 Baldi, B. ( 1994) Confirmatory Method Trial of the Residue Method, AM 0938 0994 0, " Determination of Dicamba and Dichlorosalicylic Acid Residues in Beef Tissues ( GC)": Final Report: Lab Project Numbers: 94 0037: 09/ 94 AM. Unpublished study prepared by EN CAS Analytical Labs. 115 p.

43554205 Formanski, L. ( 1995) Confirmation of Dicamba and 3,6 dichlorosalicylic Acid Residues Detected in Goat Liver and Kidney from a Dicamba Metabolism Study Conducted at SAI: Final Report: Lab Project Number: 480068: 134: DP/ 301753. Unpublished study prepared by Sandoz Agro Analytical Chemistry & Environmental Sciences. 104 p.

43698601 Pierotti, M. ( 1995) Confined Accumulation Studies of Dicamba on Rotational Crops: Final Report: Lab Project Number: 480065: 22: 301712. Unpublished study prepared by Pan Agricultural Labs, Inc. and Sandoz Agro, Inc. 524 p.

43814001 Guirguis, M. ( 1995) Crop Residue Study with Dicamba on Cotton: Final Report: Lab Project Number: 480068: 137: DP 301822. Unpublished study prepared by Chemalysis Labs. 569 p.

43814002 Jimenez, N. ( 1993) Determination of Dicamba 5 Hydroxy Dicamba Residues in Barley, Corn, Cotton, Cotton Processed Fractions, Pasture Grass, Peanut, Sorghum, Soybean, Sugar Cane, Tomato, Tomato Processed Fractions, Wheat and Wheat Processed Fractions ( GC): ( Revised): Lab Project Number: AM 069B 0593 03. Unpublished study prepared by Sandoz Agro, Inc. 64 p.

43814101 Jimenez, N. ( 1995) Crop Residue Study with Dicamba Formulations on Soybeans: Final Report: ( Data Submitted as Alternate to Craven Laboratories Generated Data): Lab Project Number: 100/ 94/ 01: 480068: 133. Unpublished study prepared by Minnesota Valley Testing Labs, Inc. 1466 p.

43814102 Formanski, L. ( 1995) Dicamba Residue Study on Soybean Grain and Soybean Processed Fractions: Final Report: ( Data Submitted as Alternate to Craven Laboratories Generated Data): Lab Project Number: 100/ 94/ 01: 480068: 140. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 89 of 94 Unpublished study prepared by Alvey Agricultural Research and Texas A& M University. 511 p.

43814103 Jimenez, N. ( 1994) Determination of Dicamba Dichlorosalicyclic Acid and 5 Hydroxy Dicamba Residues in Asparagus and Soybeans ( GC): ( Data Submitted as Alternate to Craven Laboratories Generated Data): Lab Project Number: AM 0941 1094 0. Unpublished study prepared by Sandoz Agro, Inc. 63 p.

43814104 Smith, M. ( 1995) Confirmatory Method Trial for the Residue Method, AM 0941 1094 0 " Determination of Dicamba, Dichlorosalicylic Acid and 5 Hydroxy Dicamba Residues in Asparagus and Soybeans ( GC)": ( Submitted as Alternate to Craven Laboratories Generated Data): Lab Project Number: 111S24: 111P18: DP 101844. Unpublished study prepared by EPL Bio Analytical Services, Inc. 198 p.

43866601 Jimenez, N. ( 1995) Stability of Dicamba and 5 Hydroxy Dicamba in Stored Frozen Field Corn: Final Report: Lab Project Number: 480068: 127: DP 301949. Unpublished study prepared by Minnesota Valley Testing Labs, Inc. 239 p.

44089302 Formanski, L. ( 1996) Crop Residue Study with Dicamba Formulations on Sugar Cane: Final Report: ( Data submitted as alternate to Craven Laboratories generated data): Lab Project Number: 480068/ 150: DP 303099: 105/ 95/ 01. Unpublished study prepared by MVTL Labs. 250 p. ( Relates to L0000128).

44089303 Jimenez, N. ( 1996) Crop Residue Study with Dicamba Formulations on Field Corn: Final Report: ( Data submitted as alternate to Craven Laboratories generated data): Lab Project Number: 480068/ 149: DP 303325: 104/ 95/ 01. Unpublished study prepared by EPL Bio Analytical Services, Inc. 544 p. ( Relates to L0000127).

44089304 Jimenez, N. ( 1996) Crop Residue Study with Dicamba Formulations on Barley: Final Report: ( Data submitted as alternate to Craven Laboratories generated data): Lab Project Number: 480068/ 146: DP 302071: 106/ 95/ 01. Unpublished study prepared by EPL Bio Analytical Services, Inc. 536 p.

44089305 Jimenez, N. ( 1996) Crop Residue Study with Dicamba Formulations on Wheat: Final Report: ( Data submitted as alternate to Craven Laboratories generated data): Lab Project Number: 480068/ 145: DP 302049: 103/ 95/ 01. Unpublished study prepared by Minnesota Valley Testing Labs, Inc. 797 p.

44089306 Guirguis, M. ( 1996) Crop Residue Study with Dicamba Formulation on Sorghum: Final Report: ( Data submitted as alternate to Craven Laboratories generated data): Lab Project Number: 480068/ 148: DP 302998: 110/ 95/ 01. Unpublished study prepared by Minnesota Valley Testing Lab. 284 p. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 90 of 94 44089307 Guirguis, M. ( 1996) Crop Residue and Residue Decline Study with Dicamba Formulation on Soybean: Final Report: ( Data submitted as alternate to Craven Laboratories generated data): Lab Project Number: 480068/ 147: DP 302093: 100/ 95/ 01. Unpublished study prepared by Minnesota Valley Testing Lab. 328 p.

44891302 Guirguis, M.; Haughley, D.; Riley, M. ( 1999) The Magnitude of Dicamba Residues in Wheat Forage and Hay: Lab Project Number: 97073: 99/ 5008: 903 97073. Unpublished study prepared by BASF Corp. 123 p. { OPPTS 860.1500 44891303 Wofford, J.; Malinsky, D.; Riley, M. ( 1998) A Meat and Milk Magnitude of the Residue Study with Dicamba in Lactating Dairy Cows: Lab Project Number: 98/ 5106: 97076: AM 0938 0994 0.

45196801 Haughey, D.; Malinsky, D. ( 2000) The Magnitude of Dicamba Residues in Cotton Gin Byproducts: Lab Project Number: 2000/ 5151: 97075: ADPEN 903 99 B97075 001. Unpublished study prepared by BASF Corporation. 82 p. { OPPTS 870.1500} Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 91 of 94 AGENCY MEMORANDA RELEVANT TO THIS RESIDUE CHAPTER AND TOLERANCE REASSESSMENT Table 9. Agency Memoranda Citations.

Date DP Barcode CB No. From To MRID Nos. Subject under review D304019, D306687

D306690 None C. Olinger 44089302, 44089306 Dicamba. Case 0065. PC Code 029801. Residue Data in Sorghum and Sugarcane.

3/ 10/ 05 D312086 None G. Kramer D. Kenny/

J. Miller None Review of Label Amendment for Dicamba + 2,4 D ( Outlaw   , EPA Registration # 42750 68).

7/ 26/ 01 D275611 None G. Kramer S. Brothers/

R. Forrest 45154001 PP# 6E06209. Dicamba ( Distinct ® , EPA Reg # 7969

150) on Sweet Corn. Evaluation of Residue Data and Analytical Methods.

10/ 13/ 98 D249098 None W. Donovan J. Miller/

E. Wilson None PP# s 6F4604 and 4F3041  Dicamba ( Clarity ®

Herbicide) on Asparagus, Corn, Cotton, Grass Forage and Hay, and Wheat Forage and Hay. Preharvest Use on Wheat, Barley, and Soybean. Amendment of 31 Aug

1998.

7/ 16/ 98 D228703 None S. Chun J. Miller/

E. Wilson 43866601, 44089303,

44089304, 44089305,

44089307 PP# 4F3041 Dicamba ( Banvel ® , Clarity ® , IPA Salt of Dicamba, Banvel ® SGF) Preharvest Use on Wheat,

Barley, Corn, and Soybeans; Preplant burndown use on Soybeans. Amendment of 9/ 9/ 97.

6/ 25/ 98 D228694,

D239967 None S. Chun J. Miller/

E. Wilson 43698601 PP# 6F4604 Dicamba ( Banvel ® , Clarity ® , IPA Salt of Dicamba, Banvel ® SGF) on Cotton, Asparagus, Grass Forage and Hay, and Wheat Forage and Hay.

Amendment of 9/ 9/ 97.

7/ 14/ 97 D204488, D204809,

D209229 13882, 13948,

14695 L. Cheng K. Whitby 43245203, 43274501,

43245206, 43425803,

43245204, 43245205 Dicamba. Case 0065. PC Code 029801. Residue Data in Sorghum, Wheat, Asparagus, and Sorghum and Sugarcane Processed Fractions.

1/ 21/ 97 D232478 17705 J. Stokes D. McCall None PP# 6F4604. Dicamba. Petition Method Validation Results. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 Table 9. Agency Memoranda Citations.

Date DP Barcode CB No. From To MRID Nos. Subject 92 of 94 7/ 29/ 96 D223283, D223292, D223300, D223311, D223380, D223383, D223361, D223363, D223316, D223320, D223373, D223374, D223355,

D223356 None S. Knizner,

W. Dykstra,

and C. Lewis J. Whitehurst 43814101, 43814102,

43814103, 43814104 Dicamba Amendment to PP# 4F3041/ FAP# 4H5428 and PP# 4G3061 for Preharvest Use of Dicamba on Wheat,

Barley, and Soybeans. Withdrawal of PP# 4G3061

Preplant Burndown Use of Dicamba in Soybeans.

6/ 27/ 96 D227359 None F. Griffith D. Marlow 42883201, 43814002 PP# 6F4604  Dicamba ( Banval ® ) on Cotton, Asparagus,

Grass Forage and Hay, and Wheat Forage and Hay.

Tolerance Method Validation ( TMV) Request.

6/ 24/ 96 D226526 17271 D. Miller P. Deschamp None Dicamba ( 029801). Registrant Response to Ruminant and Hen Metabolism Studies. GDLN 171 4b.

5/ 2/ 96 D220430, D220469, D220471,

D220473 16431, 16432, 16433,

16434 F. Griffith D. McCall 42283201, 43814001,

43814002, 43274501,

43370701 PP# 6F4604  Dicamba ( Banval ® ) on Cotton, Asparagus,

Grass Forage and Hay, and Wheat Forage and Hay.

3/ 11/ 96 D207649 14378 L. Cheng J. Mitchell 43370701 Dicamba. Case 0065. Residue Data in Grass Forage and Hay.

3/ 7/ 96 D204482 13874 L. Cheng J. Mitchell 43245201 and 43245202 Dicamba. Case No. 0065. Ruminant and Hen Metabolism Data for GLN 171 4b.

2/ 16/ 96 D197629 12947 L. Cheng J. Mitchell 41972001 Dicamba. Case 0065. Confined Rotational Crop Study.

7/ 12/ 94 D204754 13923 S. Funk W. Waldrop/

J. Mitchell None Dicamba ( List A, Case No. 0065, Chemical No.

029801). Sandoz Proposal for the Replacement of Craven Data. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 Table 9. Agency Memoranda Citations.

Date DP Barcode CB No. From To MRID Nos. Subject 93 of 94 1/ 31/ 94 None None M. Metzger J. Mitchell None Dicamba. Meeting with Registrant on 1/ 12/ 94, phone call of 1/ 19/ 94. Field Trial Requirements.

12/ 14/ 93 D194776 12482 D. Miller J. Mitchell 42883201 Dicamba. Independent Method Validation.

9/ 13/ 93 D193993,

D193995 12358,

12359 D. Davis R. Taylor/

V. Walters/

A. Kocialski None PP# 3F2794/ PP# 4H5439. Dicamba in/ on Cotton ( Preplant Application).

5/ 21/ 93 D189821 11702 D. Davis R. Taylor/

V. Walters None PP# 3F02794. Dicamba in/ on Cotton ( Between Crop Application). Amendment to Permanent Tolerance Petition to Replace DMA Salt of Dicamba with Sodium Salt.

D189823 11703 D. Davis R. Taylor/

V. Walters None PP# 3F02794. Dicamba in/ on Cotton ( Between Crop Application). Amendment to FAT Petition to Replace DMA Salt of Dicamba with Sodium Salt.

D189825 11704 D. Davis R. Taylor/

V. Walters None ID# 055947 00028. Banvel SGF ® Herbicide. Label Amendment.

4/ 23/ 93 D189039, D189041,

D189043 11542 L. Cheng R. Taylor/

V. Walters and Toxicology Branch 42675901 Dicamba ( SRR) Registration Standard: Response.

PP# 4F3041/ FAP# 4H5428. Dicamba ( ID # 55947 38;

Potassium Salt) on Grass and Grains. Amendment Wheat Processing Study.

1/ 17/ 92 D169036 8617 R. Lascola R. Taylor None Dicamba ( Banvel). Impact of Craven Laboratories Analytical Data on Registrations.

9/ 23/ 91 D167962 8517 M. Metzger S. Stanton None 91 MS 11. Dicamba on Cotton. ( EPA Reg. No. 55947

1).

7/ 26/ 90 None 6712 S. Funk R. Taylor/

V. Walters 41387001 Amended Registration Request for Banvel Herbicide ( Dicamba DMA Salt); Petitioner's Response to Deficiencies. I. D. No. 55947 1. Record No. 265171.

6/ 30/ 89 None None R. Schmitt R. Engler/

L. Rossi Refer to the Residue Chemistry Chapter Dicamba ( SRR) Registration Standard. Dicamba Summary of Analytical Chemistry and Residue Data Barcode: D317703 Table 9. Agency Memoranda Citations.

Date DP Barcode CB No. From To MRID Nos. Subject 94 of 94 5/ 18/ 89 None 4424 and 4425 E. Haeberer R. Taylor and Toxicology Branch 40642801 and 40547911 PP# 3F2794/ FAP# 4H5439; Dicamba in/ on Cotton,

Supplemental Submission of May 27, 1988; Cotton Metabolism Study, Storage Stability Study.

11/ 4/ 88 None 3968, 3969, 4018,

4019 F. Griffith R. Taylor and Toxicology Branch 40663801 PP# 4F3041/ FAP# 4H5428  Dicamba on Grass and Grains. Evaluation of June 14, 1988, Amendment.

8/ 12/ 83 None None C. Trichilo A. Rispin/

R. Taylor Refer to the Residue Chemistry Chapter Dicamba Registration Standard.