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Sudden Oak Death — Abstract of Paper
Surveying for Sudden Oak Death in California
Walter Mark1 and Amy Jirka2
Sudden Oak Death (SOD) caused by Phytophthora ramorum is an apparently introduced pest in California. The disease was first reported in Marin County, California, in 1995 and at approximately the same time in Santa Cruz County. It was later determined that P. ramorum, then unnamed, was known as early as 1993 to affect Rhododendrons in Europe. Since the first report in California in 1995, P. ramorum has now been confirmed by isolation in ten counties in California as well as one county in Southern Oregon. The California State Board of Forestry (BOF) established a Zone of Infestation for SOD to include all counties with SOD, and the California Department of Food and Agriculture (CDFA) has implemented regulations restricting the movement of plant material with P. ramorum. Several states have established quarantines to attempt to prevent the importation of P. ramorum from California. Other countries including Canada and Korea have also established quarantines with the same objective. The enforcement of these quarantines and Zones requires detailed knowledge of the distribution of SOD in California. The determination of the distribution of SOD is the purpose of the statewide survey for SOD.
1Professor, Natural Resources Management Department, Cal Poly State University, San Luis Obispo, CA 93407 and Co-Chair, COMTF Monitoring Committee (e-mail: wmark@calpoly.edu)
2Research Technician, Research Technician, Natural Resources Management Department, Cal Poly State University, San Luis Obispo, CA 93407
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