Mustard species are commonly found infesting winter wheat fields in eastern Washington. A new PNW Extension publication, PNW703: Integrated Management of Mustard Species in Wheat Production Systems
, discusses how to identify and control three of the most common mustard species infesting wheat in the region: blue mustard, flixweed, and tumble mustard.
Mustards can cause severe yield losses in winter wheat because they begin to compete with wheat in the fall when wheat plants are small. If left unchecked, they will compete over much of the growing season.
Although there are a number of herbicides that can provide effective control of mustards in wheat, application timing is critical. Many poor control issues are the result of late-application. Many growers do not recognize that they have a mustard problem until the plants begin to bolt and flower in the spring. By then, chemical control is difficult and significant wheat yield loss has already occurred.
Visit the Weed Resources page to see publications and information on other troublesome weeds in wheat.