Summer Patch

Pathogen: Magnaporthiopsis poae

Identification

Symptoms

  • Circular or serpentine patches during summer stress
  • Annual bluegrass and Kentucky bluegrass decline
  • Often tied to recurring problem areas
Season
May, Jun, Jul, Aug, Sep
Regions
All Regions
Turf Hosts
Annual Bluegrass, Kentucky Bluegrass

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This is identification help, not a diagnosis. Symptoms described here can overlap between diseases and other causes (drought, wear, nutrient deficiency). When you're not sure, or before applying any treatment, contact your state's Cooperative Extension office - most offer free or low-cost diagnosis and know your local conditions best.