Brown Patch - Warm Season Grass
Grass species affected
- All warm-season grass species, especially St. Augustinegrass and zoysiagrass
- November through May
- Circular brown areas up to 20 feet in diameter that typically develop during cool, wet weather in spring or fall.
- Leaf blades wilt and die, resulting in large brownish-tan areas.
- Avoid applying excess nitrogen in fall, or any other time of year, especially from quick-release or soluble, liquid fertilizers. Milorganite releases nitrogen slowly and can safely be used.
- Mow unaffected areas first and diseased areas last to avoid infecting areas of healthy lawn.
- Collect and dispose of grass clippings in the garbage when brown patch is present.
- To avoid spreading the fungus, after mowing, clean the mower blades by rising with water and drying with a cloth.
- Water deeply and infrequently early in the day to allow the leaf blades to dry off and not remain wet for long periods of time.