Marin Sonoma WMA


Chair: Pierpaolo Aymar, Sonoma County Department of Agriculture/Weights & Measures

Secretary: Kayla Friedrichsen, Sonoma County Department of Agriculture/Weights & Measures

General contact: Pierpaolo Aymar or Kayla Friedrichsen at (707) 565-2371 or by email at and


The Marin/Sonoma Weed Management Area group includes representatives from federal, state, county and city agencies, private industry, and landowners. MSWMA’s goals include improving the effectiveness of local weed management efforts, increasing public awareness of invasive weeds, advancing responsible land stewardship practices, and working collaboratively with partner organizations by sharing resources and knowledge to manage and/or eradicate invasive weed populations. The group effort focuses onto the counties of Marin and Sonoma however the WMA collaborates on a regional level as well through the Bay Area Early Detection Network (BAEDN).


Physical meetings are currently not being held due to the COVID-19 pandemic. Our next scheduled online meeting will be posted shortly. The meeting will be conducted online. If you are interested in attending our next online meeting please contact Pierpaolo Aymar or Kayla Friedrichsen at the contacts listed above.

Pierpaolo Aymar is inviting you to a scheduled Zoom meeting.

Topic: Marin / Sonoma WMA
Time: To be Determined Pacific Time (US and Canada)

Join Zoom Meeting:

Meeting ID:



For more information visit

Useful Links and Information:

Local Volunteering Opportunities:

If you are interested in participating in events aimed at the control of invasive plants in the local area please visit any of the following websites  to find more information about upcoming events.


Organizations on WMA’s MOU (intend to update MOU by 2021)