Composite image of a man in standing in a field of poppies, a mixed group of people in hardhats stand proudly atop a large brown pile of cut Arundo, a man in a hard hat and face mask hauling a load of Arundo, and a woman with a shovel over her shoulder walking through a field. Text overlay reads “Cal-IPC 30-Year Anniversary: Expanding Community to Protect Biodiversity, 2021 Cal-IPC Symposium, Oct. 26-29, Online”

Photos (left to right): Shawn Thorin, Ian Torrence, Jessica Plance, Jose Gomez

Cal-IPC 30-Year Anniversary Symposium | Oct. 26-29, 2021 | Online

Register now! Early bird rates end Aug. 20

A Latino man in glasses and a black shirt points to a poster while talking to a smiling Italian woman

Join us to connect with colleagues and learn. Photo: Claire F. Meyler

Celebrate 30 years of learning with Cal-IPC. Join us for more session talks, discussion groups, and posters covering a wide range of topics related to invasive plant biology and management.

Symposium Sponsorship

Sponsor the Symposium! Connect to California’s natural resource management community, while providing vital support.

Share your shot! Submit pictures to the 2021 Photo Contest

YOUR images help us tell the story of weed work in our state. Share your pictures now, and the images could be featured online, in social media, or in other marketing materials -with credit, of course.

Information for presenters

The Call for Abstracts is now closed. Please see information for presenters to help plan your talk. We look forward to sharing discoveries and lessons learned.

Cal-IPC Awards

View award winners from previous Symposia and celebrate their success.

Cal-IPC Symposia Archive

Looking for more content? See our Symposia Archive for presentations and proceedings for previous Symposia back to 1995.

California Invasive Plant Council

Protecting California’s environment and economy from invasive plants

Cal-IPC Symposium