Tag Archives: stripe rust

Stripe rust update 07/14: Season over for winter wheat

By Xianming Chen The stripe rust season is over for winter wheat and almost over for spring wheat and barley in the eastern Pacific Northwest (PNW). We have completed stripe rust data collections in the germplasm nurseries of both winter and spring crops in all locations. In the experimental fields, we have not seen very odd reactions for commercially grown varieties ... Read More »

Stripe rust update 06/07: Rust spreading due to cool, wet weather

By Dr. Xianming Chen As the weather has been cool and wet for the eastern Pacific Northwest (PNW), stripe rust has developed and spread quickly in the region. This week, we recorded stripe rust data in the experimental fields at Hermiston, Ore. (Umatilla Co.), Walla Walla, Wash. (Walla Walla Co.), and Lind, Wash. (Adams Co.). Stripe rust reached the highest severity ... Read More »

Stripe rust update 06/02: June forecast conditions favorable for disease development

By Xianming Chen On June 1,  I was checking fields in the Palouse region (Whitman County, Wash., and Latah County, Idaho). Winter wheat ranged from Feekes 7 to Feekes 10, and spring wheat ranged from Feekes 2 to Feekes 5. Stripe rust was severe on low leaves and reached top leaves of winter wheat and started showing up on spring ... Read More »

Stripe rust update 05/12: Disease expected to develop in eastern PNW

By Dr. Xianming Chen  On May 11, we were checking winter wheat fields in Whitman, Garfield, Columbia, Walla Walla, Franklin and Adams counties in Washington. Because of the high moisture, wheat crops look good with winter wheat ranging from early jointing (Feekes 5) to boot (Feekes 10), and spring wheat ranging from just emerged to late tillering (Feekes 3). Stripe ... Read More »

Stripe rust update 04/17: Pressure low in Eastern Washington

By Dr. Xianming Chen On April 13 and 14, we were planting spring cereal nurseries and taking the first notes of the winter nurseries at Mount Vernon, Wash. The winter plants were at jointing stage ranging from Feekes 4 to 6. Wheat stripe rust was up to 60 percent severity on susceptible varieties. Barley stripe rust up to 40 percent ... Read More »

Stripe rust report 03/01: Stripe rust forecast predicts moderate epidemic level

By Dr. Xianming Chen Based on the predication models using the weather data from November to February, wheat stripe rust is forecast to be in the moderate epidemic level range (20-40 percent yield loss) in the 2022 growing season. The models predict highly susceptible varieties to have 33 percent yield loss with a standard deviation of 7 percent. This value is ... Read More »

First stripe rust forecast of 2022 calls for moderate levels

By Xianming Chen 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 percent 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 ... Read More »

War on stripe rust: Scientist leads PNW battle against devastating wheat disease

From the Capital Press Xianming Chen and a crew of researchers planted winter wheat seeds by hand on a recent November morning. They carefully deposited the seeds in just the right spot so they could be easily identified as they grew. Chen, a USDA Agricultural Research Service research plant geneticist, greeted everybody cheerfully, with a big grin and enthusiastic waves. ... Read More »

Stripe rust report: Lowest level in years found in Eastern Washington

By Dr. Xianming Chen Rusts in western Washington  Last week, we were taking the second-time stripe rust notes of the winter cereal nurseries and the first-time notes of spring cereal nurseries in Mount Vernon (Skagit County) in western Washington. Winter cereals ranged from boot (Feekes 10) to flowering (Feekes 10.5), and spring plants were in early jointing (Feekes 4-5). As ... Read More »

Stripe rust update 04/16: Pressure low in PNW

From Dr. Xianming Chen On April 13 and 14, we were planting spring cereal nurseries and taking the first notes of the winter nurseries at Mount Vernon on the west side of Washington state. The winter plants were at jointing stage ranging from Feekes 4 to 6. Wheat stripe rust was up to 40 percent severity on susceptible varieties. Barley stripe rust ... Read More »