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Weed Resources



Mustard Species in Wheat.
Weed species belonging to the mustard family (Brassicaceae, previously known as Cruciferae) are often collectively referred to as mustards. The mustard family contains nearly 400 genera and more than 4,000 species.

Additional Resources:


Mayweed Chamomile herbicide resistance.
Tools to manage herbicide resistance.
Wheat Mode of Action Tool

This tool allows you to search by trade name or active ingredient to identify other herbicides with the same mechanism(s) of action and alerts you of weed species in the PNW that have developed resistance to the active ingredient.

PNW Weed Management Handbook

This handbook is designed as a quick and ready reference for weed control practices and herbicides used in various cropping systems or sites in Idaho, Oregon, and Washington.

National Jointed Goatgrass Research Program

The National Jointed Goatgrass Research Program was initiated in 1994 by using a special USDA grant to fund regional research and extension activities directed toward limiting the damage caused by jointed goatgrass to winter wheat production in the western United States. View more information generated over the course of this 15-year program.

Additional Resources

Common Weeds List


Herbicide Resistance Testing Program

Weed ID Quiz


Weed Control Reports

Washington State University