Fine-leaved fescues and some ryegrasses, however, are particularly susceptible. The first noticeable symptoms are water-soaked patches of grass.
Infected grass blades soon die and fade to a bleach-tan color when dry.
In severe cases, the diseased grass looks scorched or yellowed in irregularly shaped or circular patches from 3 to 35 cm in diameter. The patches may be widely scattered or, if close together, may coalesce into larger spots. In humid weather, the fungus Laetisaria fuciformis grows visibly on the infected grass blades and leaf sheaths. This type of spread depends upon mowing, foot traffic, and other activities, which occur on the diseased areas. Management Strategies Maintain adequate soil fertility.