IDAHO WHEAT COMMISSION

News

Moderate stripe rust forecast for this year

Based on the weather data in November and December 2021, stripe rust in the 2022 wheat growing season is forecasted to be in the middle range of the moderate epidemic level (20-40% yield loss on susceptible varieties).  Using the forecast models based on the 2021 November and December weather data, yield loss of highly susceptible winter wheat varieties in the 2022 crop season is predicted to be between 25 to 40% with an average of 34%. This percentage is lower than the forecast (39%) made last January for the 2021 crop season due to the relatively cold weather of the late December in 2021 compared to that of 2020.  Currently grown varieties in the Pacific Northwest are forecasted to have yield losses ranging from 0 to 17% depending upon the level of resistance or susceptibility of individual varieties.