Bipolaris/Drechslera Leaf Spot

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

Stand Symptoms

Plant Symptoms
Plant Symptoms

Fungal Symptoms