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