Summer Patch is a turfgrass disease caused by the fungus Magnaporthe poae. It causes grasses to form light green patches up to 24 inches wide that later turn a reddish-brown. Some patches may have circles of green grass in the center, sometimes called "frog eyes." Summer Patch is very dangerous for Kentucky Bluegrass, Annual Bluegrass and Creeping Red Fescue lawns.
- When available, plant resistant varieties of turfgrass.
- Maintain healthy turf through proper care.
- Aerate to increase drainage.
- Use Triple Action Lawn Fertilizer to fertilize properly. It has slow-acting nitrogen.
- Do not mow below recommended height.