Tag Archives: stripe rust

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 »

By Dr. Xianming Chen Based on the predication models using the weather data from Nov. 1, 2020, to Feb. 28, 2021, wheat stripe rust is forecasted to be in the low end of the normal epidemic level range (20-40 percent yield loss) in the 2021 growing season. The models predicted highly susceptible varieties to have 22 percent yield loss. This number ... Read More »

By Dr. Xianming Chen Based on the weather conditions in November and December 2020, stripe rust in the 2021 wheat growing season is forecasted to be in the upper range of moderate epidemic level (20-40 percent yield loss on susceptible varieties). Using forecast models based on the 2020 November and December weather data, yield loss of highly susceptible winter wheat ... Read More »

By Dr. Xianming Chen Winter wheat has reached maturity, and harvest has started in central and southcentral Washington. In the Palouse region in Eastern Washington and northern Idaho, winter wheat ranged from milk to soft dough stages, and spring wheat ranged from flowering to milk. Stripe rust has reached 100 percent severity on susceptible varieties of spring wheat in our ... Read More »

By Dr. Xianming Chen During the last two weeks, we have been recording stripe rust data in our experimental nurseries at various locations and completed note-taking of winter nurseries at all locations. Stripe rust reached 90 to 100 percent severity on susceptible winter wheat varieties at all locations. Barley stripe rust developed up to 80 percent severity at Mount Vernon ... Read More »

Dr. Xianming Chen This week, we were completing stripe rust notes of winter cereal nurseries in Mount Vernon (Skagit County), Wash.; Hermiston (Umatilla County), Ore.; and Walla Walla (Walla Walla County), Wash. Winter wheat and barley ranged from flowering to soft dough stage. Wheat stripe rust developed to 100 percent severity on susceptible winter varieties in these locations. Barley stripe ... Read More »

By Dr. Xianming Chen This week, we were eventually able to travel to Mount Vernon (Skagit County) in northwest Washington to finish the first note-taking of stripe rust in winter nurseries and planting spring nurseries. The activities were about two to three weeks later than usual. Winter wheat ranged from late jointing (Feekes 9) to headed (Feekes 10.5) and winter ... Read More »

From Dr. Xianming Chen Today, I was checking stripe rust in our winter wheat experimental fields around Pullman (Whitman County in Washington), and found stripe rust on susceptible check varieties in two of the three locations. This is the first observation of stripe rust of this season in the Palouse region. The same fields were checked on April 22 and ... Read More »

By Dr. Xianming Chen Tuesday, I was checking wheat fields in Whitman, Adams, Lincoln, Grant and Douglas counties in Washington. Winter wheat ranged from Feekes 4 to 7. Minor frost damage on leaf tips was common in Whitman County, caused by freezing night temperatures of the last week. Stripe rust was found only in one commercial field in Lincoln County. ... Read More »

By Dr. Xianming Chen Based on the predication models using the weather data from Nov. 1, 2019, to Feb. 29, 2020, wheat stripe rust is forecasted to be in the severe epidemic level range (40-60 percent yield loss) in the 2020 growing season. The models predicted highly susceptible varieties to have 44 percent to 53 percent with an average of 48% ... Read More »