Pathogen:
Pythium spp.
Host:
Annual Bluegrass, Kentucky Bluegrass, Creeping Bentgrass, Colonial Bentgrass, Velvet Bentgrass, Perennial Ryegrass, Tall Fescue, Fine Fescue, Redtop
Environmental Requirements:
85-95 F daytime and 68F+ night time temperatures, high humidity, low soil moisture
Stand Symptoms:
circular reddish-brown patches
Plant Symptoms:
water soaked and slimy foliage
Fungal Signs
whitish, cottony mycelium on affected turf when moisture is present
Environmental Modification:
improve drainage, avoid high levels of N fertility
Plant Resistance:
Perennial Ryegrass most susceptible
