Gray Snow Mold

Pathogen: Typhula spp.

Identification

Symptoms

  • Gray-white mycelium and circular patches after snowmelt
  • Sclerotia may be visible in infected tissue
  • Most severe under long snow cover
Season
Jan, Feb, Mar, Nov, Dec
Regions
Northeast, Midwest, Mountain West
Turf Hosts
Bentgrass, Annual Bluegrass, Kentucky Bluegrass, Fine Fescue

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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.