Larry Williams, UF/IFAS Extension Agent for Okaloosa County, offers lawn and garden advice specific to Northwest Florida.
689-5850 or 729-1400, Ext. 5850
Gray leaf spot is a common fungal disease of St. Augustine grass. Wet conditions promote this fungus. This includes high humidity, heavy dews and particularly frequent afternoon and evening rains.
The individual spots or lesions are first seen as tiny brownish spots smaller than a pinhead. As they become larger, they will be circular and then begin to elongate lengthwise along the leaf. The spots will become brown to grayish in appearance. Numerous spots or lesions may be found on