Take-all Root Rot

Grass Affected

St. Augustinegrass

 

Diagnostic Description

  • Disorder first appears as chlorotic (yellow) patches 8 to 24” in diameter, usually in late summer during prolonged cloudy weather. Without control, patches will expand. Grass thins and develops bare areas. Green shoots next to chlorotic ones are common. Plants in the affected areas have poor root system and very few stolons.

 

Conditions Favoring Infestation and Typically Yearly Occurrence

Associated with consistent, low mowing heights in shady, wet soils. Summer.