Pythium Blight

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Initial Pythium blight symptoms
Early symptoms on creeping bentgass
Pythium blight on perennial ryegrass
Pythium blight on bermudagrass
  • Pathogen: Pythium aphanidermatum (Edson) Fitzpatrick, Pythium ultimum Trow


  • Common Names: Pythium Blight, Cottony Blight, Grease Spot


  • Climatic Zone: Temperate, Subtropical, Tropical


  • Geographic Distribution:North America, Europe, East Asia, Australia, South America, Africa


  • Favorable Conditions: Hot (85 F(30 C) to 95 F (35 C) humid conditions


  • Hosts: Kentucky bluegrass, Poa annua, creeping bentgrass, perennial ryegrass, fine-leaf fescues, bermudagrass,


  • Symptoms:Initially appear as small circular patches reddish-brown in color. Early morning the turf leaves appear water soaked. Pythium blight follows drainage patterns resulting in symptoms that "streak"
Retrieved from "http://www3.hcs.ohio-state.edu/turfwiki/index.php/Pythium_Blight"
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