snow mold

noun
variants: or

snow rot

Definition of snow mold

  1. 1a :  a disease of cereals caused by a fungus (Calonectria graminicola) and characterized by abundant superficial white mycelium when the snow melts b :  a similar disease especially of turf grasses caused by a fungus of the genera Typhula, Sclerotium or Fusarium

  2. 2 :  a fungus causing a snow mold

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