Tag Archives: stripe rust

Stripe rust update 05/15: Stripe rust found in Lind experimental plots

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 »

Stripe rust report 05/05: Stripe rust appears in the Palouse region

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 »

Stripe rust update 04/22: Incidence low, but caution needed

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 »

Stripe rust forecast to be in the severe epidemic level in eastern PNW

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 »

Early 2020 stripe rust forecast predicts severe levels

From Dr. Xianming Chen Based on the weather conditions in November and December 2019, stripe rust in the 2020 wheat growing season is forecasted to be in the severe epidemic level range (40-60 percent yield loss). Using forecast models based on the 2019 November and December weather data, yield loss of highly susceptible winter wheat varieties in the 2020 crop ... Read More »

Stripe rust observed in wheat fields in Lincoln, Douglas counties

By Dr. Xianming Chen Tuesday, we were checking wheat fields in Whitman, Adams, Lincoln, Grant and Douglas counties in Washington. Winter wheat ranged from emerging (before Feekes 1) to early jointing (Feekes 5). Among more than 30 fields with wheat plants in the growth range of Feekes 3 to 5, stripe rust was observed in three fields, one in Lincoln ... Read More »

Stripe rust update 0712: Stripe rust season basically over with only very low levels found

By Dr. Xianming Chen During our field survey on July 9 in Whitman, Garfield, Columbia, Walla Walla and Astotin counties of Washington and Nez Perce and Latah counties of Idaho, winter wheat ranged from milk to mature. Stripe rust was found on green plants in some winter wheat fields, but at very low levels. Spring wheat ranged from heading to ... Read More »

Stripe rust update 06/14: Disease pressure low in Eastern Washington

By Dr. Xianming Chen In the western Pacific Northwest (PNW), especially northwestern Washington, winter wheat ranged from kernel watery ripe (Feekes 10.54) to soft dough (Feekes 11.2) and spring wheat from stem extension (Feekes 7) to heading (Feekes 10.3). Stripe rust has been severe as normal. We completed the stripe rust data collection on winter crop nurseries and the first ... Read More »

Stripe rust update 5/29: Stripe rust developing in experimental fields in Palouse region

By Dr. Xianming Chen This morning, I was checking fields in the Palouse region. Winter wheat was at boot to heading stages (Feekes 10-10.3). Stripe rust was found in all of our experimental winter wheat fields around Pullman, Wash. Rust appeared in small foci of mostly 5-10 stems, except one row entirely infected. Most foci had rust on leaves from bottom ... Read More »

Stripe rust report 0509: Stripe rust found in Franklin County

By Dr. Xianming Chen Yesterday, we were checking wheat fields in Whitman, Garfield, Columbia, Walla Walla and Franklin counties in Washington and Umatilla County in Oregon. Winter wheat ranged from early jointing (Feekes 5) to heading (Feekes 10). Stripe rust was found in several locations. At Central Ferry in Garfield County, severe stripe rust was found on squirreltail (wild rye) ... Read More »