Pathogen

Colletotrichum graminicola

Host

Annual Bluegrass, Creeping Bentgrass, Kentucky Bluegrass, Fine Fescue, Perennial Ryegrass

Environmental Requirements

80-95 F, high moisture

Stand Symptoms

Irregular-shaped patches of yellowed or bronzed turf, several inches to feet wide

Plant Symptoms

Elongated reddish-brown lesions

Fungal Signs

Dark acervuli and setae

Environmental Modification

Decrease thatch, relieve compaction, increase P and K fertility

Plant Resistance

Use less susceptible species