White Blight
From Turf Wiki
- Pathogen: Melanotus phillipsii (Berk. & Broome) Singer
- Common Names: White Blight, White Patch, Melanotus White Patch
- Climatic Zone: Temperate, Subtropical, and Tropical
- Geographic Distribution: North America, Europe, East Asia, Australia, Africa, South America
- Favorable Conditions: Full sun to partial shade, temperatures above 84 degrees F (29 degrees C) during the day and above 70 degrees F (21 degrees C) at night, heat stress, low moisture
- 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: blighted, circular patches 3"-5" (8-12 cm) in diameter that enlarge, center is white with a pick to salmon colored border, grass blades become matted and appressed to the surface, a gray to white mycelium, blades will be killed at tips first but, does not infect stem
