Tag Archives: stripe rust

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 to 90-100% severities on susceptible varieties in all locations except the ... Read More »

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 the fields planted with Piranha CL+ and Nova AX, and stripe ... Read More »

By Dr. Xianming Chen On May 6, we were checking fields around Pullman, Wash. Winter wheat and barley ranged from Feekes 5 to 7. We were able to find stripe rust on susceptible checks in all our experimental fields at the Palouse Conservation Field Station, Plant Path Farm, and Spillman Farm. The incidence was low (<0.01%) in all locations, as ... Read More »

By Dr. Xianming Chen Research Plant Pathologist, USDA-ARS In the last two weeks, we were planting spring cereal nurseries and checking winter wheat fields in various locations. So far, we have found stripe rust in our disease monitoring and germplasm screening fields in various locations except those around Pullman.  On April 9, our crew found stripe rust in our winter ... Read More »

By Xianming Chen Wheat stripe rust is forecasted to be in the low epidemic range (1-20% yield loss) for the 2025 growing season for the eastern Pacific Northwest, based on the predication models using the weather data from November 2024 to February 2025. The models predicted highly susceptible varieties to have 18% yield loss with a standard deviation of 9%. ... Read More »

By Dr. Xianming Chen Based on the weather data of the November and December 2025, stripe rust in the 2024 wheat growing season is predicted to be in the range of severe epidemic level (40-60% yield loss on susceptible varieties). Using a set of forecast models based on this winter weather data so far (November and December 2024), highly susceptible ... Read More »

By Xianming Chen As July 12, we have almost completed recording stripe rust data in our winter and spring crop nurseries at various locations in Washington. Stripe rust developed to 100% severity on susceptible winter wheat varieties in all nurseries and up to 80% severities on spring wheat nurseries in Lind, Walla Walla, and Central Ferry and to 100% on susceptible ... Read More »

By Xianming Chen Stripe rust in the Palouse region On May 30, I was checking wheat and barley fields in the Palouse region (Whitman County, Wash., and Latah County, Idaho). Winter wheat ranged from boot (Feekes 10) and heading (Feekes 10.5), and winter barley reached the flowering stage (Feekes 10.52). Spring wheat and barley ranged from early tillering (Feekes 2) ... Read More »

By Xianming Chen USDA Research Plant Pathologist On April 24, when we were planting spring wheat nurseries at the Palouse Conservation Farm Station near Pullman in Whitman County, I was checking our winter wheat nurseries. Plants had reached middle jointing stage (Feekes 6), and stripe rust was more widespread than the last report, with almost all susceptible check rows having ... Read More »

By Xianming Chen USDA Research Plant Pathologist Over the last 10 days, we were planting spring cereal nurseries and checking winter wheat fields in various locations. So far, we have found stripe rust in our disease monitoring and germplasm screening fields in all locations we have checked. On April 2, we were planting spring wheat and barley at Walla Walla. ... Read More »