Bluestone Control
"In an average of all tests made, the dust treatment has not given as good control as the Bluestone treatment. This has held true for the past when the dust method, carbonate dust applied at the rate of two ounces, which is not due to the treatment. This is doubtless due to the fact that the smut in the soil causes such heavy losses in wheat, which does not leave water in the soil. One Demonstrations
—Honesty conducted by agent, on 51 farms of Latah county. In all of these tests, the dry treatment was compared with the wet treatment which the farmer ordinarily used. The plots were treated with some grade of copper carbonate and compared with the treatment commonly used on the farm of the cooperator. The average percentage of smut for all of the dry treatment was 13 percent. The average percentage of smut for all of the wet treatment was 10.3 percent. The end of wheat was better in every case where the dry treatment was used.
"On the farm of Frank Gustafson near Moscow, five different brands of copper carbonate were compared with bluestone and salt and with bluestone and salt followed by the lime bath. Ninety pounds of Jenkins' club wheat were used for each treatment. The smut in the copper carbonate plots varied from 36 percent to 42 percent. 