Eradication effectiveness monitoring in Oregon tanoak forests

Abstract

Phytophthora ramorum was first discovered in Oregon forests in July 2001 where it was killing tanoak (Lithocarpus densiflorus) and infecting Pacific rhododendron (Rhododendron macrophyllum) and evergreen huckleberry (Vaccinium ovatum). At that time, nine infested forest sites were identified ranging in size from 0.2 to 5 hectares, and totaling 16 hectares on non-industrial private forest lands, industrial private forest lands, and federal forest land administered by the Coos Bay District, Bureau of Land Management (BLM). A 23 square kilometer quarantine area was established around the area of infestation. P. ramorum has since been the focus of an intense eradication effort on approximately 81 hectares of infested forest land distributed in patches over an area of approximately 155 square kilometers.

Parent Publication

• Proceedings of the Sudden Oak Death Fourth Science Symposium

Citation

Michaels Goheen, Ellen; Kanaskie, Alan; Hansen, Everett; Sutton, Wendy; Reeser, Paul; Osterbauer, Nancy. 2010. Eradication effectiveness monitoring in Oregon tanoak forests. In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M. 2010. Proceedings of the Sudden Oak Death Fourth Science Symposium. Gen. Tech. Rep. PSW-GTR-229. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 233-235