P.O. Box 1961, West Sacramento, CA 95691     (831) 442-0883     (831) 442-2351 manager@cwss.org


Click here to REGISTER NOW for early bird pricing!

Plan now to attend the 2024 Annual Conference – Hilton Santa Barbara Beachfront Resort January 24 – 26, 2024 (Wed – Fri) 

2023 CWSS Proceedings – Metal, Mixing and Microchips: 75 Years of Weed Science

Congratulations to our 2022 CWSS Scholarship Recipients! 

Applications for 2023 scholarships are available here. Deadline to apply is August 14, 2023.




























Voting privileges are open to Regular, Student, and Honorary members only. Learn More


Principles of Weed Control 4th Edition

This is a weed management book with a focus on California’s unique mix of crops, but with relevance to other areas as well. The book is for sale at Amazon and Barnes and Noble in ebook and paperback editions.


Weeds of California This new weed identification book has been in the making for over 6 years. It is the most comprehensive weed identification book yet produced in the United States. It contains over 3000 color photos of infestations and whole…


Aquatic and Riparian Weeds of the West This is practical guide to the identification and biology of submerged, floating leaved, and emergent aquatic weeds in the Western United States. The book contains a full description of 89 species representing 36 plant families…


Ecology of Weeds and Invasive Plants: Relationship to Agriculture and Natural Resource Management, 3rd Edition The Third Edition of the authoritative reference gives readers an in-depth understanding of how weeds and invasive plants develop and interact in the environment so they can manage and control…


There are times in the history of any organization when the members should pause and re-examine the reasons for existence of the organization, the purposes of the organization, and the goals toward which it is striving. And there are times for remembering those who were responsible for the organization’s inception, and for its program and achievements. Learn More Save


The CWSS will be the premier authoritative source of information on weed biology and weed management in California and will serve as a forum for all individuals interested in these disciplines.


The California Weed Science Society provides information exchange on weed science and technology through an annual conference, publications, and other activities; advises stakeholders on matters pertaining to weeds; facilitates cooperation among individuals, agencies… Learn More


Get the latest news about weed science, new events, and organization updates.