They are dependent both on the cultivar and the weather. Losses are roughly proportional to the length of time during which plants show obvious symptoms. A long, cool spring prolongs the symptomatic period and increases losses. In a warm spring, losses may be minimal. In each case, loss was attributed mostly to reduced numbers of tillers.
Late planting is sometimes effective in avoiding infection periods in the fall.
Infection takes place at the time of wheat emergence in the fall, so avoid irrigation during this period if you have a susceptible variety. It is the policy of Kansas State University Agricultural Experiement Station and Cooperative Extension Service that all persons shall have euqal opportunity and access to its educational programs, services, activities, and materials without regard to race, color, religion, national origin, sex, age, or disability. Kansas State University is an equal opportunity organization. These materials may be available in alternative formats.