What is Sudden Oak Death?

Sudden Oak Death is a tree disease caused by the plant pathogen Phytophthora ramorum. The disease kills some oak species and has had devastating effects on forests in California and Oregon. Read more about Sudden Oak Death.


Two new P. ramorum finds in Humboldt County streams, and 28 more in Oregon forests. Read more…

More from Oregon: Funding for combating EU1 lineage in wildlands, and a finalized Strategic Action Plan for Sudden Oak Death. Read more…

So far in 2017, seventeen positive finds in California nurseries. Read more…

Read the latest newsletter.


Calendar of Events

October and November SOD Blitz Workshops Bay Area, CA

11/15 – 11/16 – 66th Annual Meeting of the California Forest Pest Council, “Responding to Large-Scale Tree Mortality in Urban and Rural Communities” Davis, CA

View more details on upcoming events in the latest newsletter…


Resources on other Phytophthora species found in native plant nurseries and restoration sites are at the CalPhytos.org web page.

Help stop the spread of forest pests – including Sudden Oak Death – on firewood! Check out the website of the California Firewood Task Force.

The California Oak Mortality Task Force is a task force under the California Forest Pest Council.