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According to Mayer, "Regularly raking leaves helps your lawn breathe and stay healthy [by] allowing sunlight and air to penetrate the lawn canopy, preventing disease and promoting grass growth."
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.
The disease most commonly associated with the panicum mosaic virus pathogen is St. Augustine Decline Syndrome, which infects species of turf grass and causes chlorotic mottling. In addition to St. Augustine Decline, panicum mosaic virus is responsible for chlorotic streaking and mild green mosaicking in select cultivars of switchgrass and millet.
St. Augustine is a dark green grass with broad, flat blades. It spreads by aboveground stolons , commonly known as "runners", and forms a dense layer. The grass occurs on both sides of the Atlantic Ocean , [ 1 ] including much of the southeastern United States, Texas, [ 2 ] [ 3 ] Mexico, and Central and South America. [ 1 ]
For example, if St. Augustine grass is kept at 4 inches, it should be mowed before it reaches a height above 6 inches. Schiavon recommends mowing when it reaches 5.2 inches.
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Over 77 °F (25 °C), the growth rate of the fungus decreases significantly, and it ceases at 85 °F (29 °C). 8 Turf grass that is poor in nutrition and are slow growing are areas that are more susceptible to red thread disease. 2 The fungus grows from the thread like red webbing structures called sclerotia. 1 The sclerotia can survive in leaf ...
Dollar spot is most commonly found on closely mowed turfgrasses. The pathogen infects most cool and warm-season grasses throughout the world, including creeping bentgrass (Agrostis stolonifera), annual bluegrass (Poa annua), Kentucky bluegrass (Poa pratensis), perennial ryegrass (Lolium perenne), hybrid bermudagrasses (Cynodon dactylon x tranvaalensis), seashore paspalum (Paspalum vaginatum ...