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.


Potential new P. ramorum hosts identified, including threatened and endangered species. Read more…

SOD Blitz finds all-time highest infection rates after last winter’s heavy rains. Read more…

Nursery finds diminishing in WA but a new find in British Columbia during 2017 Canadian survey. 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.