Large Patch

Pathogen: Rhizoctonia solani

Identification

Symptoms

  • Large circular patches on warm-season turf
  • Orange or yellow margins may appear
  • Most active in spring and fall transitions
Season
Mar, Apr, May, Sep, Oct, Nov
Regions
South, Transition Zone, Warm West (CA / AZ / NM)
Turf Hosts
Zoysiagrass, Bermudagrass, Centipedegrass, St Augustinegrass

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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.