Pathogen

Bipolaris sorokiniana Drechslera spp

Host

Annual Bluegrass, Kentucky Bluegrass, Perennial Ryegrass, Colonial Bentgrass, Fine Fescue, Tall Fescue

Environmental Requirements

70-95 F, high moisture

Stand Symptoms

Purplish cast and thinning of stand

Plant Symptoms

Small purple to black leaf spots

Fungal Signs

Conidia

Environmental Modification

Moderate fertility levels

Plant Resistance

There is a wide range of susceptibility of turfgrass cultivars