stripe rust

From the Capital Press Stripe rust may last the entire wheat season, longtime USDA research plant pathologist Xianming Chen says. “It’s a combination of the growth stage and weather conditions,” Chen told Capital Press of the fungus, which impacts wheat and barley. “If the weather becomes dry and hot quickly,…

By Xianming Chen Stripe rust has been continually developing in the Pacific Northwest. The relatively dry conditions between the middle of April and middle May slowed the rust development little bit, but the periodical showers and relatively low temperatures in the last couple of weeks have been pushing for stripe rust…

By Tim Murray(Reprinted from 2018) High-temperature adult-plant resistance, frequently referred to as HTAP resistance, is used widely in PNW winter and spring wheat varieties to help reduce the impact of stripe rust. This time of year, when we’re transitioning into warmer spring temperatures, is when I often get the question…

By Dr. Xianming ChenUSDA-ARS Since the last update on March 19, stripe rust of wheat has been developing fast in the Pacific Northwest, and many winter wheat fields have been applied with fungicides at the herbicide timing. We have been planting spring cereal nurseries and collecting stripe rust data from winter…

By Dr. Xianming Chen On March 18, we were checking wheat fields in Franklin, Benton, Walla Walla, Columbia, Garfield, and Whitman counties. Wheat plants ranged from Feekes 3 to 6. Stripe rust was found in all counties. In Franklin County, stripe rust has developed quickly since the field check on March 3, forming…

From smallgrains.wsu.edu Weather data collected by USDA’s Dr. Xianming Chen from November 2025 to February 2026 indicate severe epidemic levels of stripe rust. Highly susceptible varieties could experience yield losses of 40-60%. Commercial fields will likely have yield losses between 8% and 40% without a fungicide application.  Read the rest…

By Dr. Xianming ChenUSDA-ARS Research Plant Pathologist Wheat stripe rust is forecasted to be in the upper range of severe epidemic (40-60% yield losses on susceptible varieties) in the 2026 growing season for the eastern Pacific Northwest, based on the predication models using the weather data from November 2025 to February 2026….

By Xianming Chen USDA-ARS Research Plant Pathologist Based on the weather data of November and December 2025, stripe rust in the 2026 wheat growing season is predicted to be in the upper range of severe epidemic level (40-60% yield loss on susceptible varieties). Using a set of forecast models based on…

By Dr. Xianming Chen So far, we have completed recording stripe rust data of our winter crop nurseries in various locations including Central Ferry, Mount Vernon, Wallla Walla, Lind, and Pullman (Palouse Conservation Field Station, Plant Path Farm, and Spillman Farm) in Washington and Hermiston, Ore. Wheat stripe rust developed…

From Dr. Xianming Chen Since the last stripe rust update on May 7, stripe rust has been developing in the Pacific Northwest (PNW), especially in Washington. After the update, we received a report of stripe rust in commercial fields of winter wheat in Franklin County. On May 9, we checked…