Powdery Mildew | EvapIQ Disease Library

Identification

Symptoms

White powdery growth on leaves
Favored by shade, poor air movement, and cool humid weather
Common on Kentucky bluegrass in shade

Season: Mar, Apr, May, Sep, Oct
Regions: All Regions
Turf Hosts: Kentucky Bluegrass, Fine Fescue

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Sources

Penn State Turfgrass Pest Diagnostic Lab - Powdery Mildew

This is identification help, not a diagnosis. Symptoms described here can overlap between diseases and other causes (drought, wear, nutrient deficiency). When you're not sure, or before applying any treatment, contact your state's Cooperative Extension office - most offer free or low-cost diagnosis and know your local conditions best.