Gray Leaf Spot Lawn Disease: How to Identify, Control, and ...
2023年10月28日 · Gray leaf spot lawn disease (GLS) is a fungal infection that turns your turf thin and grayish and kills the grass if left unchecked. It’s a major threat to perennial ryegrass but also damages tall fescue and St. Augustinegrass.
Gray Leaf Spot | NC State Extension - North Carolina State ...
Gray leaf spot initially appears as spots on the leaves that are round or oval, tan in color, and have a dark brown border. When the leaves are wet or humidity is high, the leaf spots turn gray and fuzzy with profuse spore production.
Gray Leaf Spot - The Lawn Institute
Gray leaf spot initially appears as spots on the leaves that are round or oval, tan in color, and have a dark brown border. When the leaves are wet or humidity is high, the leaf spots turn gray and fuzzy with profuse spore production.
Gray Leaf Spot on St. Augustinegrass | Home & Garden ...
Gray leaf spot is a fungal disease (caused by Pyricularia grisea) that occurs most commonly on St. Augustinegrass (Stenotaphrum secundatum), but occasionally may also be found infecting tall fescue, bermudagrass, centipedegrass, and ryegrass in home lawns.
Gray leaf spot - Wikipedia
Gray leaf spot (GLS) is a foliar fungal disease that affects grasses. In grasses other than maize it is caused by Pyricularia grisea , which only infects perennial ryegrass , tall fescue , and St. Augustine grass in places with warm and rainy climates.
Gray Leaf Spot | Penn State Turfgrass Pest Diagnostic Lab
Symptoms of gray leaf spot in warm-season turfgrasses include dark, water-soaked lesions on leaves and stems that enlarge into round to diamond-shaped spots. The spots often occur along the leaf edges or midrib and may extend across the entire leaf.
Early gray leaf spot symp-toms are observed on leaves as small, pinpoint lesions surrounded by yellow halos. At this stage, it can be hard to correctly identify the disease, but as lesions mature, they elongate into narrow, rectangular, brown to gray spots. Lesions expand parallel to leaf veins and may become 1.5 to 2 inches long.