Sudden Oak Death
*SOD Blitz Results Meeting 2022 - virtual*
2022 SOD Blitz Results Meeting
6-8pm Thursday 11/10 online

Join via Zoom, no registration required, free of charge, open to all
Hear blitz results from Dr. Matteo Garbelotto (UC Berkeley Forest Pathology & Mycology Lab) and get your questions answered! Links to blitz results & maps and information are on the SOD Blitz project site: www.sodblitz.org
Join a 2023 SOD Blitz!
Blitz weekend 2023 TBD
Register for an outdoor info event, Zoom Q&A session, or to receive packets by mail by emailing Kerry: kwininger@ucanr.edu
Info about the SOD Blitzes taking place at Sonoma State University's Galbreath Preserve and Fairfield Osborn Preserve also coming soon.
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See what we offered Fall 2019: SOD Info & Training Events
CLICK HERE FOR FULL INFO: Fall 2019 SOD events flier

SOD Blitz Results Meeting
Tuesday, November 12, 6-8pm, UCCE Sonoma Office, 133 Aviation Blvd #109, Santa Rosa
SOD Training Workshops -- ISA CEUs applied for!
1) Monday, November 18, 10am-3pm, UCCE Sonoma Office, 133 Aviation Blvd #109, Santa Rosa
2) Tuesday, November 19, 10am-3pm, Mendocino Coast Botanical Gardens,18220 CA-1, Fort Bragg
Questions or need to cancel? Contact Kerry at kwininger@ucanr.edu
We last held a traditional SOD Blitz in 2019 (pre-COVID). Information about that blitz:
Test your trees for free! Monitor disease spread in a rainy year, lookout for new dangerous strains, and test oaks for SOD with OakSTeP
Things are not "as usual." Come learn to:
New this year:
- Leaves will be tested for the new and aggressive EU1 pathogen strain. Already in Oregon
forests, we need to look for it in California to have a chance of eliminating it if found.
- Introducing the OakSTeP program that will provide an easy and affordable way for licensed arborists, tree care specialists, preserve mangers and qualified government workers to test oaks for SOD. Join the OakSTep program for FREE if you register in person during a SOD blitz ($200 value), and get priority for sample processing.
- Thinking of doing something to control SOD, or have done so already? We'll have a questionnaire and important information and tips at the trainings.
- El Fairfield Osborn Preserve blitz es un evento bilingue (Inglés y Español)
Six meetings took place this year in Petaluma, Yorkville (docent-led at SSU'sGalbreath Preserve), Sebastopol, Santa Rosa, Sonoma, and Penngrove (docent-led at SSU's Osborn Preserve) from April 25th - 27th.
The Osborn Preserve blitz in Penngrove was a bilingual event (English & Spanish) / Este es un evento bilingue (Inglés y Español)
Unless otherwise noted, SOD blitz events consist of a one-hour training, then you collect leaves at locations of your choice and drop them back at the meeting site that weekend. We drive leaves to UC Berkeley Lab for analysis on Monday. You get results in early fall.
There is no cost for this activity. Hosted by the UC Master Gardener Program of Sonoma County SOD Specialists and the University of California Cooperative Extension, Sonoma County. Funding provided by the USDA Forest Service.
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2020 SOD BLITZ RESULTS
Over 3,900 trees in Sonoma and Mendocino counties were surveyed in 2020. See the full table of SOD Blitz Results here.
Surveyed Trees | Symptomatic Oak Nearby | Sampled Trees | SOD Positive Sampled Trees | Estimated True Infection Rate | Symptomatic Trees Surveyed | |
Mendocino | 596 | 17.6% | 142 | 11.3% | 6.3% | 55.5% |
Sonoma-West | 490 | 7.2% | 69 | 27.5% | 5.1% | 18.4% |
Sonoma-North | 128 | 3.2% | 31 | 35.5% | 5.0% | 14.1% |
Sonoma-East | 2707 | 8.5% | 189 | 30.2% | 8.3% | 27.7% |