Skip to main content Skip to navigation

Pest Management – Weeds

Overview of PNW resources for weed management and a summary of factsheets and PNW’s when available.

WYWSWS001 – Weeds of the West. The comprehensive guide to weed identification, biology and ecology.

EM005E – Invasive Weeds of Eastern Washington. This guide, specific to eastern Washington, assists with identification and management of invasive weed species that are agriculturally important as well as ecologically damaging to natural ecosystems.

DVD0086 – Weed Identification and Weed Management Techniques (video). This 30 minute video explains foundational weed management practices.

EM9122 – Integrated Pest Management: How to Identify a Plant or Weed (video). This video demonstrates the best ways to identify a plant or weed. It covers the process of photographing and collecting the plant and then how to narrow down and establish the plant’s category. It explains how to use a field guide and a dichotomous key to identify a plant.

EM8776 – Perennial Weed Biology and Management. Explains how simple and creeping perennial weeds reproduce and spread. Covers weed seedbanks, seed dormancy in soil, and factors that influence seed germination. Describes the typical root structure of perennial weeds and the various ways perennial weeds compete with crop plants for water, nutrients, and light. Discusses the advantages and disadvantages of various methods to control perennial weeds, such as prevention, mechanical control, herbicide applications, and biological control. Includes sources for additional information.

PNW0588 – Nightshade: Biology and Control in the Pacific Northwest. This publication assists with identification of nightshade weed species and their management.

PNW103 – Scotch Broom: Biology and Management in the Pacific Northwest. Classified as a noxious weed in Washington and Oregon, this publication discuss biology and management.

Steel in the Field. Weed control demands time, labor and expense for every farmer every year. Steel in the Field shows how today’s implements and techniques can control weeds while reducing—or eliminating—herbicides. In practical language, Steel in the Field presents what farmers and researchers have learned in the last 20 years about cutting weed-control costs through improved cultivation tools, cover crops and new cropping rotations.

WSU Extension Integrated Weed Control Project The project collects USDA-approved biocontrol insects from Washington and neighboring states for redistribution throughout Washington on large scale weed infestations, following the International Code of Best Practices for Classical Biological Control of Weeds. The program’s website provides information for specific biological control agents available for release.