Tag Archives: stripe rust

By Xianming Chen Last week, we completed collecting the stripe rust data in our germplasm screening nurseries of winter crops and took the first time of stripe rust data of the spring crop nurseries at Mount Vernon in northwestern Washington (Skagit County). As always for this location under natural infection, wheat stripe rust was severe, up to 100% severity on ... Read More »

By Dr. Xianming Chen On May 16, we were checking winter wheat fields in Whitman, Garfield, Columbia, Walla Walla, Franklin and Adams counties in Washington. Winter wheat ranging from early jointing (Feekes 5) to early flowering (Feekes 10.51). Stripe rust was not found in any of the checked commercial fields and not found in our stripe rust experimental plots in Central Ferry (Garfield County) and ... Read More »

By Dr. Xianming Chen On April 26 and 27, we were planting spring cereal nurseries and taking the first notes of the winter nurseries at Mount Vernon, Wash. The winter plants were at middle jointing stage (Feekes 6 on average). Wheat stripe rust was up to 80% severity on susceptible varieties. Barley stripe rust was up to 40% severity. The ... Read More »

By Xianming Chen  Wheat stripe rust is forecasted to be in the moderate epidemic level range (20-40% yield loss) in the 2023 growing season, based on the predication models using the weather data from November 2022 to February 2023. The models predicted highly susceptible varieties to have 37% yield loss with a standard deviation of 16%. This value is higher ... Read More »

By Dr. Xianming Chen USA-ARS Based on the weather conditions in November and December 2022, stripe rust in the 2023 wheat growing season is forecasted to be in the lower range of moderate epidemic level (20-40% yield loss on susceptible varieties). Using forecast models based on the 2022 November and December weather data, yield loss of highly susceptible winter wheat ... Read More »

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 »

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 »

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 »

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 »

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 »