UC Cooperative Extension provides information about Sudden Oak Death and other plant disorders caused by the pathogen Phytophthora ramorum. We also monitor for the presence of this pathogen in Mendocino, Humboldt, and Del Norte Counties and are currently working on developing silvicultural techniques for reducing pathogen presence in forested settings. The following links and downloads present some of the information we've found most relevant to Sudden Oak Death management and monitoring in the North Coast. For more information about Phytophthora ramorum in general, as well as information about how it is affecting other California counties, visit the California Oak Mortality Task Force web site at www.suddenoakdeath.com. You can also obtain more information from Yana Valachovic, Humboldt-Del Norte Forest Advisor, or from Chris Lee, Sudden Oak Death Program Coordinator.

Introduction and Background Information
Links and downloads of basic information about Sudden Oak Death in the North Coast, as well as the latest information.
Introduction to P. ramorum and Frequently Asked Questions (Link)
May 2006 Phytopthora ramorum update (PDF)
September 2006 Phytophthora ramorum update (PDF)
Regulations Concerning Movement of Forest Products (PDF)
Oak Tree Health in the North Coast (PDF)

Maps
Visual information about the presence of P. ramorum in Humboldt County.
Phytopthora ramorum Infestation in Humboldt CountY (PDF)

Guide Series
A series of guides produced by the California Oak Mortality Task Force for a variety of user groups, a North Coast information guide for woodcutters in our area, and the general Task Force brochure.
Sudden Oak Death Guide for Arborists (PDF)
Sudden Oak Death Guide for Forest Collectors (PDF)
Sudden Oak Death Guide for Homeowners (PDF)
Sudden Oak Death Guide for Recreationists (PDF)
Sudden Oak Death Information for Woodcutters (PDF)
Sudden Oak Death Brochure (PDF)

Controlling Phytophthora ramorum in Forests
Phytophthora ramorum History and Management in Humboldt County (PDF)
Fire and Phytophthora ramorum (PDF)
Care for Individual Host Trees (PDF)

Impacts of Phytophthora ramorum
Phytophthora ramorum Impacts and Needs in the North Coast (PDF)