Weed Science Resources


Cheatgrass Management Handbook

    • The annual grass cheatgrass (Bromus tectorum L.)-or downy brome-is one of the most significant invasive weeds in the western United States because it reduces forage quantity and quality, alters wildfire regimes, impacts species diversity, and reduces wildlife habitat. In this handbook, we present information that should assist in developing a strategic approach to managing this invasive annual grass. We focus on managing cheatgrass in rangelands and natural areas but not in cultivated croplands. Many of the principles discussed here also apply to other invasive weeds in natural systems, and we encourage readers to incorporate the strategic management framework into other weed management programs. This handbook is not designed to be a comprehensive compilation of all literature related to cheatgrass, but rather a guide to assist land managers and others with developing a cheatgrass management program. The framework described here encourages managing an “ecological system” rather than viewing programs simply from the perspective of killing an undesirable plant. Download a PDF copy, or order a hard copy here.


Weeds of the West

        • Learning to identify unwanted plants around the home, farm, or ranch will be much easier with this book published by the Western Society of Weed Science and cosponsored by Cooperative Extension of the Western States. Weeds of the West is an extensive publication which can help you identify plants that compete with native plants, horticultural and agricultural crops as well as those that can poison livestock and people. This beautiful, easy-to-use guide contains more than 900 color photographs showing the early growth stages, mature plants and features for positive identification of each weed discussed. Descriptions, habitats and characteristics of each plant are also in this 650 page book. Click here to Order

Wyoming Weed Watchlist

Wyoming Weed Watchlist Field Guide

        • This guide is designed to enhance prevention and early detection efforts of weeds not yet widely established in Wyoming. It was developed by students enrolled in the University of Wyoming’s Invasive Plant Ecology course of fall semester 2010. Each weed profile is written by a different student, so some variability in areas of focus is apparent. However, the information is supported by literature and is considered accurate and current. The field guide is not intended as a management handbook, but rather an educational tool for outdoor recreationalists, natural resource professionals, tourists, gardeners, agriculturalists, and others to aid in identification of unfamiliar, yet extremely important, weeds in the region. The highest leverage step in reducing potential impact of new invasive weeds in Wyoming is to detect new populations before they can become well established. Small, new populations are easier to control than larger, older populations. Order a hard copy of the Field Guide (8.5 x 11 spiral bound with pages for notes). Or download a free PDF version here.

Weed Science Links:

      • Wyoming Weed & Pest Council
        The Wyoming Weed & Pest Council is comprised of 23 Weed & Pest Districts in the state, associated with the boundaries of each county. The existence of the Council is allowed for by law under the Wyoming Weed & Pest Control Act of 1973 under W.S. 11-5-102.
      • Weed Science Society of America
        The Weed Science Society of America, a non-profit professional society,

        • Promotes research, education, and extension outreach activities related to weeds;
        • Provides science-based information to the public and policy makers; and
        • Fosters awareness of weeds and their impacts on managed and natural ecosystems.

        Weed science job listings from WSSA

      • Western Society of Weed Science
        The objectives of WSWS are to:

        • To foster and encourage education and research in weed science.
        • To foster cooperation among state, federal and private agencies in matters of weed science.
        • To aid and support commercial, private and public agencies in the solution of weed problems.
        • To support legislation governing weed control programs and weed research and education programs.
        • To support the Weed Science Society of America and foster state and regional organizations and agencies interested in weed control.
      • International Survey of Herbicide Resistant Weeds
        Funded and Supported by the Herbicide Resistance Action Committee (HRAC), the North American Herbicide Resistance Action Committee (NAHRAC).

        • The purpose of this survey is to monitor the evolution of herbicide-resistant weeds and assess their impact throughout the world. Global collaboration between weed scientists make the survey and this web site possible.