Concept

Fusarium patch

Summary
Fusarium patch is a disease in turf grass settings also called pink snow mold or Microdochium patch. In many cool season grass species in North America, it is caused by the fungus Microdochium nivale . The white-pink mycelium on infected leaf blades is a distinguishing characteristic of the Microdochium nivale pathogen. Fusarium patch is considered economically important in the turf grass industry because of its tendency to cause significant injury to golf greens, thereby decreasing putting surface quality. Dissimilar from other snow molds, such as gray snow mold, Microdochium nivale does not need snow cover to cause widespread infection. Hosts and symptoms M. nivale can infect all cool-season turf grass species. 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. Dur
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