Curvularia / Nigrospora Blight

Pathogen: Curvularia spp., Nigrospora sphaerica

Identification

Symptoms

  • General blighting and decline on already stressed turf
  • Often follows heat, drought, or mowing stress
  • Usually secondary or opportunistic
Season
Jul, Aug, Sep
Regions
Transition Zone, South
Turf Hosts
Bermudagrass, Bentgrass, Annual Bluegrass, Perennial Ryegrass

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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.