![]() ![]() RED THREAD ( Laetisaria fuciformis) Pinkish patches from 3 to 15 inches in diameter develop during rainy weather. Cottony mycelium may be evident in the morning growing over dead tissue. ![]() Spots have a reddish margin and expand until they girdle the leaf blade. or Sclerotinia homeocarpa) Rounded, straw-colored, slightly sunken patches up to 2 inches in diameter on bentgrass greens, 4–6 inches in diameter on other lawns. ![]() Dark gray smoke ring is sometimes visible on lower mowed turf.ĭOLLAR SPOT ( Moellerodiscus spp. Since most grass diseases affect leaves, patches and rings describe certain diseases in more advanced stages of development.īROWN PATCH ( Rhizoctonia solani) Round patches of turf up to several feet in diameter appear watersoaked and eventually turn brown. The diseases have been categorized as patches (cause dead spots or patches in the lawn), rings (cause rings of dead or affected grass), or leaf blight (affect individual blades of grass, often over a wide area and no distinct patch or ring pattern may be noticeable). ![]() Following is a short description of the most common diseases to help you sort out which one may be causing your problem. Several fungal diseases attack lawn grasses. ![]()
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