Hero Image

Sudden Oak Death

suddenoakdeath copy

Within the last few years, sudden oak death has filled in gaps and expanded its range into the ranchlands of western Marin, and into the forests of northern Sonoma County.  

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.


"Sudden Oak Death:
Roadside Management"

oak tree

                by Steven Swain, UCCE Marin
              Environmental Horticulture Advisor

For more information on Sudden Oak Death please visit:


SOD website - sonoma-mortality

California Oak Mortality Task Force