Pathogen
Ophiosphaerella korrae
Host
Annual Bluegrass, Kentucky Bluegrass, Fine Fescue, Rough Bluegrass
Environmental Requirements
Root infection occurs during cool wet weather, symptom expression during heat and drought stress
Stand Symptoms
“Frog-eyes” of wilted grass that will collapse and die out
Plant Symptoms
Purpling of the plant
Fungal Signs
Dark brown to black ectotrophic hyphae on the roots and crown
Environmental Modification
Water deeply and infrequently, lower pH, aerify, use a fall fertility program
Plant Resistance
View info on plant resistant varieties.
