Document Type


Publication Date



fusarium, small grain crops, wheat, livestock

Extension Number

ExEx 2047


Agricultural and Biosystems Engineering


Fusarium head blight, also called scab, is a disease of many small grain crops including wheat, barley, and rye. Oats can also be affected but generally with less damage. Scab is caused by the fungus Fusarium. Several species of Fusarium can cause the disease, but far and away the most common in South Dakota is Fusarium graminearum. This is the same fungus that causes Gibberella stalk rot in corn. When F. graminearum infections occurs in corn ears, the disease is referred to as Gibberella ear rot; it does not arrest kernel development. Generally, warm and wet conditions at wheat flowering favor scab. Disease incidence is favored by temperatures in the 80-95°F range during flowering and by substantial rainfall during the 7 days previous to flowering.


September 2005.