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

Stand Symptoms
Stand Symptoms


Plant Symptoms


Fungal Symptoms