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.
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.
"Sudden Oak Death: Roadside Management" by Steven Swain, UCCE Marin Environmental Horticulture Advisor
For more information on Sudden Oak Death please visit: California Oak Mortality Task Force website
