Cottony pink mycelium may be visible in wet conditions. It attacks leaf blades through pores called stomata, or through ragged grass cuts caused by mowing. Red thread causes a reddish, antler-like fungal structure called a stroma, made of mycelium and plant tissue, to grow from infected grass blades. Red thread and pink patch may occur together or separately, and learning to tell them apart will help you treat them more effectively. How Do You Identify Red Thread and Pink Patch? All species of grass are susceptible to these diseases, though perennial rye and fescues are most at risk. Red thread is caused by the fungus Laetisaria fuciformis, and pink patch is caused by Limonomyces roseipellis. Red thread and pink patch cause circular pink or red patches to form in a yard, around 2-6 inches wide. They often live in lawns that have excessive thatch buildup and appear when there is a lot of rain or humidity, and in undernourished lawns. Red thread and pink patch are similar fungal lawn diseases that commonly affect turfgrass in the late spring. How to Keep Red Thread and Pink Patch from Coming Back.How to Get Rid of Red Thread and Pink Patch.
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