Cal-IPC Symposium

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

The “Virtual Doors” are now open! Registered attendees can join us on the Whova app

Registered, but didn’t get the email about the Whova online event platform? Check your junk mail or spam filters for an email from “Cal-IPC <>” Still not seeing it? Email us at!

Register now to get Regular rate by Oct. 15.

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 with more session talks, discussion groups, and posters covering a wide range of topics related to invasive plant biology and management. We are meeting online to stay safe, but our online platform has many opportunities for engagement and connection.

Don’t miss out! Field Trips spots still available 

2021 Symposium attendees, expand your experience with a field trip to learn about restoration projects in your area. Limited spots are first come, first served.

Vote in the 2021 Photo Contest, Deadline Oct. 28 

YOUR images help us tell the story of weed work in our state. Vote for your favorites!

Check out the program

Check out what’s in store for this year’s online Symposium.

Symposium Sponsorship

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

Information for presenters

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.