Slime Mold

Pathogen: Physarum spp., Mucilago spp., Fuligo spp.

Identification

Symptoms

  • Gray, white, yellow, or black crusty/powdery masses on grass blades
  • Growth is usually on the leaf surface
  • Does not directly kill turf
Season
Apr, May, Jun, Jul, Aug, Sep, Oct
Regions
All Regions
Turf Hosts
All

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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.