Spring Dead Spot
From Turf Wiki
- Pathogen: Ophiosphaerella narmari (J. Walker & A. M. Sm.) Wetzel, Hulbert, & Tisserat
- Common Names: Spring Dead Spot
- Climatic Zone: Temperate, Subtropical, and Tropical
- Geographic Distribution: North America, Europe, East Asia, Australia, Africa, South America
- Favorable Conditions: Cool, moist soil with temperatures between 50-68 degrees F (10-20 degrees C), optimum air temperature below 56 degrees F (15 degrees C), high Nitrogen fertilization at the end of summer
- 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: Circular patches that are bleached or dead during Spring geen-up, up to 3' (1 m) in diameter, rotted stolons and roots, drak brown mats of mycelium on stolons and roots
