This moisture may be the result of rain, fog, heavy dews or watering practices carried out by the individual. 3. Many types of injury such as those caused by nematodes, insects, spilled toxic materials, excess fertilizer and improper mowing can be confused with disease damage. The individ- ual should eliminate the possibility of injury by these causes before assuming a disease is present. In general, the pres- ence of a disease is indicated when either the grass continues to decline or the condition spreads to new areas. 4. If a disease is found in a planting of grass, it should be identi- fied and the recommended control measures started as soon as possible. (See the following table.) 5. Control of a disease is usually ac- complished by the use of a fungi- cide. When using a fungicide the following points should be kept in mind: In most cases it is best to spray the entire planting and not just the diseased spot. The directions and precautions on the fungicide container should be followed carefully. The fungicide should be sprayed on the area so that there is complete and even distribution; otherwise, the grass may be injured and the disease not controlled. A small amount of wetting agent, such as a liquid deter- gent, should be used in the spray to insure complete cov- erage of the grass foliage. It is best to spray small areas at a time to obtain uniform cov- erage. * II I ~4\~ Figure 3.-Typical appear- ance of leaves of St. Augus- tinegrass affected by gray leaf spot disease. * Use enough water to wet the grass thoroughly. (Ten gallons per 1,000 square feet is usually sufficient.) e An application every 10 to 14 days may be necessary to keep the disease under control. * Do not mow the grass immediately after applying a fung- icide.