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Fusarium patch
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==Hosts and symptoms== ''M. nivale'' can [[Infection|infect]] all cool-season turf [[Poaceae|grass]] species.<ref>[http://www.ces.purdue.edu/extmedia/BP/BP-102-W.pdf] {{Webarchive|url=https://web.archive.org/web/20110617104042/http://www.ces.purdue.edu/extmedia/BP/BP-102-W.pdf |date=2011-06-17 }} Latin, R. (2007) Pink snow mold and Microdochium patch. Turfgrass Disease Profiles. Purdue Extension, Purdue University</ref> Annual bluegrass (''[[Poa annua]]''), perennial ryegrass (''[[Lolium perenne]]'') and creeping bentgrass (''[[Agrostis stolonifera]]'') are more susceptible. In the fall, ''M.nivale'' infection begins as small, orange to red-brown spots, circular and only a few centimeters in diameter. During the winter and into the spring seasons, well-defined, clustered, circular patches 10β20 cm in diameter, of [[Necrosis|necrotic]] leaf tissues form on mown turf. ''Microdochium nivale'' is mostly seen on grasses mown at heights of three inches or greater.<ref>[http://www.ces.purdue.edu/extmedia/BP/BP-102-W.pdf] {{Webarchive|url=https://web.archive.org/web/20110617104042/http://www.ces.purdue.edu/extmedia/BP/BP-102-W.pdf |date=2011-06-17 }} Latin, R. (2007) Pink snow mold and Microdochium patch. Turfgrass Disease Profiles. Purdue Extension, Purdue University</ref> On taller grass, patches often lack a circular pattern that is seen in shorter mown grass.<ref>[http://www.ces.purdue.edu/extmedia/BP/BP-102-W.pdf] {{Webarchive|url=https://web.archive.org/web/20110617104042/http://www.ces.purdue.edu/extmedia/BP/BP-102-W.pdf |date=2011-06-17 }} Latin, R. (2007) Pink snow mold and Microdochium patch. Turfgrass Disease Profiles. Purdue Extension, Purdue University</ref> Pink snow mold patches usually follow [[drainage]] patterns since [[Conidium|conidia]] [[spore]]s are readily dislodged and transported by [[rain]]fall and water flowage.<ref>[http://www.ces.purdue.edu/extmedia/BP/BP-102-W.pdf] {{Webarchive|url=https://web.archive.org/web/20110617104042/http://www.ces.purdue.edu/extmedia/BP/BP-102-W.pdf |date=2011-06-17 }} Latin, R. (2007) Pink snow mold and Microdochium patch. Turfgrass Disease Profiles. Purdue Extension, Purdue University</ref> Under prolonged cool and wet conditions, white-pink [[mycelium]] can be observed along the circumference of diseased patches.<ref>Hsiang T. 2007. All you ever wanted to know about Fusarium Patch. AGSA Turf News, June 2007, pp. 13-16.</ref>
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