Browse resources Displaying 1 - 2 of 2 resources Credit Lynn Ketchum (Cropped from original) As Russian thistle becomes resistant to glyphosate, OSU Extension weed scientist finds alternatives for wheat farmers Russian thistle thrives in the dry climate of eastern Oregon and Washington and if left unchecked develops an extensive root system that competes with wheat for water and nutrients. Kym Pokorny | Nov 2, 2021 | News story Photo: Christina Hagerty (Cropped from original) Wheat virus is bigger problem in Pacific Northwest than previously thought Wheat soil-borne mosaic disease was first detected in the Walla Walla Valley along the Oregon and Washington border in 2008. Chris Branam | Mar 2, 2020 | News story