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

 

 

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