- Purplish-brown to black spots with tan centers on the leaf blade and sheath.
- Lower leaves of infected plants become shriveled and blighted.
- In severe cases, almost all of the leaves and tillers die.
- Typically follows the appearance of leaf spots on cool-weather turfgrass.
Conditional Favoring Disease:
- Temperatures between 40°F and 80°F.
- Areas with 10 hours a day of foliar wetness for several consecutive days.
- High amounts of nitrogen and low mowing height.