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Stripe Rust Forecast and Update

Stripe rust is forecasted to be in the moderate epidemic level in the eastern Pacific Northwest Based on the predication models using the weather data from November to February, wheat stripe rust is forecasted to be in the moderate epidemic level range (20-40% yield loss) in the 2022 growing season.  The models predicted highly susceptible varieties to have 33% yield loss with a standard deviation of 7%.  This value is similar with the 34% forecasted in January based only on the November-December weather conditions.  According to this prediction, susceptible and moderately susceptible commercially grown varieties will likely have 10 to 24% yield losses, or 8% yield loss on average for commercially grown varieties.   Stripe rust has not been found in eastern WashingtonSo far, stripe rust has not been found in fields of eastern Washington.  We checked wheat fields in Whitman, Adams, Lincoln, Grant, and Douglas counties on November 23, 2021; and Whitman, Garfield, Columbia, Walla Walla, Benton, Franklin, and Adams on March 1, 2022, but did not find any rust.  Stripe rust will likely to have a late start in the eastern Pacific Northwest. Recommendations for the eastern Pacific Northwest As stripe rust has not been found and the disease is likely to have a late start, fungicide application is not recommended in the early growth season at the time of herbicide application for winter wheat, unless stripe rust is observed in the fields. Fungicide application may be needed later in the flag leaf stage for fields planted with moderately susceptible and susceptible varieties (stripe rust ratings 6 – 9). For spring wheat, resistant or moderately resistant varieties (stripe rust ratings 1 – 5) should be selected for planting.

April 7, 2026
Changing diets and demographics creating new opportunities for U.S. wheat
Rising incomes, growing populations, and rapid industrialization is creating increased demand for wheat foods around the world.
April 7, 2026
Idaho ag economic impact hits records
The economic impact of agriculture in Idaho reached $44.5 billion in sales, 17.2% of the state’s total economic output.
April 7, 2026
What is the Most Important Asset on the Farm?
How much time do you spend making sure your equipment is properly maintained? From combines and drills to pickups and silos, the farm has spent a lot of money and you probably have a “correct” way to take care of the tools you’ve invested in. But what is the most important asset on the farm? Quick answer: you and the people around you. Do you allocate as much time and attention on those assets? Probably not.
April 7, 2026
ALERT: Warm Weather Threatens Wheat with Yield Loss
The warm winter weather throughout the state has experts concerned about increased fungal diseases creeping into fields and causing yield loss. Xianming Chen, USDA stripe rust expert in the PNW, is warning farmers to start checking their fields. Chen is predicting that stripe rust will be more widespread and extreme this year than in the past 15 years. The last particularly bad year for stripe rust was in 2011. Experts from the U.S. Wheat and Barley Scab Initiative are also warning about fusarium head blight and vomitoxin (DON) in winter wheat. USWBSI is reminding farmers that the best time to apply fungicides for FHB and DON management is at Feekes growth stage 10.51, when 50% of the main tillers have reached early anthesis (flowering) and up to seven (7) days following.
April 7, 2026
Impacts from Iran on Idaho Wheat Inputs
In the two weeks since the February 28 U.S. strikes on Iran, there have been jolts to the global economy. The most obvious adjustment for the majority of Americans will be at the gas pump as oil is manipulated and used as collateral. Beyond fuel, the current unrest in Iran has already started to punch agriculture in the gut in Idaho and across the country.
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