Snow mould caused by Microdochium nivale is a  common  disease  of  winter  rye in moderate and cold climatic areas. Extended duration  of  snow  cover  and  unfavourable temperature conditions support the development of this disease   and may result in reduced winter survival rates. Snow mould severity has reached 60–70 % in Russia in epidemic years.

Main symptoms
A cotton-like growth (mycellium) is present and may appear slimy on living or dead plants.

Genetic Disease Prevention
Although challenging, the genetic analysis of resistance to snow mould in rye led to the identification of significant genotypic variation for snow mold rating. The cultivation of resistant cultivars contributes to a sustainable agriculture.