Water when needed to a depth of 4 to 6 inches, if possible. Check this with a soil probe, since water may not be penetrating due to excess turf debris, unfavorable soil type, or too rapid application of water. Water in the mornings, not in late evening or at night. Avoid excessive nitrogen fertilization that results in soft growth of the foliage. Sharpen mower blades.
Dull blades fray the edges of the grass and allow the fungus hyphae to enter.
Remove and dispose of clippings from infected areas or whenever conditions are conducive to disease development. Fungicides are more effective when used preventively, but will also stop the disease s progress.