Powdery Mildew

From Turf Wiki

• Pathogen: Blumeria graminis (DC.) E. O. Speer

• Common Names: Powdery Mildew

• Climatic Zone: Temperate, Subtropical, and Tropical

• Geographic Distribution: North America, Europe, East Asia, Australia, Africa, South America

• Favorable Conditions: Optimum temperature: 41-72 degrees F (5-22 degrees C), low-light/shade and poor air circulation

• Hosts:Creeping Bentgrass, colonial bentgrass, velvet bentgrass, Perennial Ryegrass, Annual Bluegrass (Poa annua), bermudagrass (Cynodon dactylon), Tall Fescue, Kentucky Bluegrass, St. Augustinegrass, zoysiagrass, fine fescues

• Symptoms: A thin, white mycelia will appear on the leaves causing a dusty appearance