Sudden Oak Death in Oregon

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The pathogen Phytophthora ramorum that causes sudden oak death has been found in Oregon. The pathogen does not appear to affect Oregon white oaks, but it causes leaf blight and stem dieback in many kinds of ornamental shrubs.

For more information about sudden oak death in Oregon, check the links:

Publications

Sudden Oak Death and Phytophthora ramorum. (OSU Extension Publication EM 8877)
A guide for forest managers, Christmas tree growers,and forest-tree nursery operators in Oregon and Washington.

Nursery Guidelines: Phytophthora ramorum in nurseries
Guidelines to assist nursery crop producers develop an effective monitoring and action plan for P. ramorum.

Phytophthora ramorum: A guide for Oregon nurseries
A publication from OSU Extension Service that examines the biology and pathology of ramorum leaf blight and stem die back. Includes color photos of infected plants.

For more information, contact your local county office of Oregon State University Extension Service.

Web Sites

California Oak Mortality Task Force
A comprehensive informational website on Phytophthora ramorum.

Educate to Detect Program
Nationwide training to help Master Gardeners, Extension personnel, and homeowners identify, report and prepare samples of plants possibly infected with Phytophthora ramorum.

PNW Nursery IPM Diseases
A compendium of news and information about sudden oak death in Oregon compiled by OSU Department of Horticulture.

OSU Extension Plant Disease Clinic
An online guide to plant disease control, including how to collect samples for diagnosis.

OSU Extension Online Guide to Plant Disease Control
General description and management information developed for rhododendrons on ramorum leaf blight and shoot dieback

Oregon Department of Agriculture
ODA’s sudden oak death website includes a list of host and associated plants.

APHIS Sudden Oak Death site
Includes the PPQ list of regulated plants, a quarantine FAQ, and color photos of symptoms.