Kohn, (1979) Sclerotinia graminearum Elenev ex Solkina, (1939) Sclerotinia borealis or snow scald is a psychrophilic necrotrophic plant pathogen with wide host range, including crop plants, such as barley, rye and wheat, and thus causing much economical damage.

Activity preserved at 5 °C (41 °F) beyond two years, but inactivated by overnight at room temperature, or by 30 minutes of 50 °C (122 °F).

One of these is homologous to Atlantic winter flounder type I antifreeze protein.

Sclerotia and mycelia grow on sheaths, crowns, surfaces, and interiors of leaves.

[1] S. borealis is found in cool temperate areas, frigid zone areas and into the Arctic, including northern Japan, Russia (Siberia, middle course of Volga, Ural, Russian Far East[3]), northern Scandinavia, and North America.

Southernmost limit is Iwate, northern Japan, the Altai Mountains in central Siberia, and possibly the Xinjiang Province of China.

Can grow on relatively low water potato dextrose agar if twice the normal PDA concentration, sucrose, KCl, and D-mannitol.