Water in the morning or midday so the leaf blades dry as quickly as possible. Avoid excessive applications of nitrogen fertilizer, which induce tender, succulent growth and more susceptible tissue. Never apply more that 4 pounds of nitrogen per 1,000 square feet in an entire year. Chemical Control Fungicides are rarely needed to control leaf spot disease. However, if melting out disease has occurred repeatedly in the same areas over a number of years, a fungicide may be warranted.
Chemicals are most effective when combined with cultural controls.
Remove loose thatch before treatment. If a preventive spray program is used, apply the first fungicide at the first sign of leaf spot once the grass begins to grow in the spring. Make additional applications according to label directions as need develops. Turf should not be drought-stressed prior to spraying or irrigated immediately after application. Be sure to follow the instructions on the fungicide label for specific rates to use and timing of application.