Summer Patch

From Turf Wiki

• Pathogen: Magnaporthe poae Landschoot & Jackson

• Common Names: Summer Patch

• Climatic Zone: Temperate, Subtropical, and Tropical

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

• Favorable Conditions: exposed sunny area, poorly drained, compacted soils, hot, wet conditions

• 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: small circular patches of slow-growing, thin, or wilted turf 1"-3" (3-8 cm) in diameter, patches may enlarge into irregular shapes, bronze colored at the margins, occassional white bands on the foliage due to heat stress, roots and rhizomes turn dark brown