Oat Diseases

Question 1

Yellow Dwarf (oats)

Answer 1

Virus affecting many cereals and grasses

Reddened leaves, stunting

Spread by aphids (short and long distance)

Favored by late planting of spring oat;
large aphid populations

Resistant/Tolerant varieties (virus strain-specific) (1-2)
Plant early in spring (2)

Question 2

Crown Rust

Answer 2

Fungus on oat, buckthorn

leaf rust

Spread via airborne spores from infected oat or buckthorn

Favored by warm, humid;
thunderstorms in June/July

Resistant varieties (race specific) (1-2)
Plant early in spring (2)
Foliar fungicides (1-2)