Pythium blight, also called cottony blight or grease spot, is a fungal disease of turfgrasses. All turfgrasses, warm and cool season, are susceptible to attack. The disease is most severe during hot, humid conditions and where there is limited air circulation and poorly drained soils. Subdue Maxx, Banol, and Heritage are fungicides registered for use agains pythium blight. Be sure to apply according to label directions.
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