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Weed Science

The Weed Science Program area of focus includes agricultural and invasive weed control (chemical, mechanical, cultural, and biological control), weed ecology, weed monitoring and forecasting, vegetation restoration, and integrated control strategies.

Susanville East View
Susanville East View
There are many informational resources available to learn how to combat weeds.  One of the most useful is a weed identification tool found at the Weed Research and Information Center.  The University of California Integrated Pest Management (UC IPM) website has a Weed Photo Gallery to help you identify your weeds.  

Pest Management of Small Grains - Weeds is a section of the Small Grain Production Manual that specifically addresses weeds and weed control. 

Encycloweedia is sponsored by the California Department of Food and Agriculture and has a photo gallery and data sheets for identification and management of noxious weeds found in California.

Willow Creek Valley
Willow Creek Valley
Weed Science Society of America promotes research, education, and extension outreach activities related to weeds.  Their website includes links for weed identification and weed management tools.

Western Society of Weed Science coordinates efforts in weed management among various states and agencies, fosters and encourages education and research in weed science, and supports solutions to weed problems.  Their website has a link to on-line lessons about herbicides.

UC Weed Science Blog
  • David Bayer
    In memoriam: Dr. David Bayer

    David E. Bayer, Emeritus Professor in the UC Davis Department of Plant Biology, passed away on January 20, 2024 in Davis, CA. Dr. Bayer earned his B.S and M.S. degrees from Oregon State University and his Ph.D. from the University of Wisconsin  and...


    By Bradley Hanson
    Editor - Cooperative Extension Specialist
    By James E Hill
    Contributor - CE Specialist
    By Gale Perez
    Posted by - Public Education Specialist
  • Screen Shot 2024-02-26 at 7.44.56 PM
    Wildland Weed Alert: Cape Ricegrass (Stipa capensis)

    Keep an eye out for this potential problem weed in southern California: Stipa capensis. First reported in 1995 in Riverside, this species is native to the Mediterranean and has established in the Coachella Valley of the Sonoran Desert. It is spreading...


    By Justin Valliere
    Author - Assistant CE Specialist