- A root disease where the disorder first appears as chlorotic (yellow) patches 8-24″ in diameter, usually in late summer during prolonged cloudy weather . Without control, patches will expand.
- Usually observed first on outside edge golf course putting greens. Grass thins and develops bare areas. Green shoots next to chlorotic ones are common. Plants in affected areas have blackened, poor root system, no rhizomes and very few stolons.
- Associated with consistent, low mowing heights.
Conditions Favoring Infestation and Typically Yearly Occurrence
Favored by shady, damp locations receiving traffic and close-mowing. Mostly during warm wet weather.