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    Author(s): S.W. Oak; A.H. Elledge; E.K. Yockey; W.D. Smith; B.M. Tkacz
    Date: 2008
    Source: In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 413-416
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (199 KB)

    Description

    Risk-based early detection surveys in U.S. forests were conducted between 2003 and 2006 using 100 m vegetation transects. Thirty-nine states surveyed 3,570 locations in states with endemic Phytophthora ramorum; states where the pathogen had been confirmed only in woody ornamental nurseries; and states that had received potentially infected stock but did not confirm the pathogen. A total of 12,699 samples from 44 host and associated host genera were collected and diagnosed for the pathogen using nested or real-time PCR. Phytophthora ramorum positive diagnoses were obtained for two samples from San Francisco County, California confirming that the pathogen is not yet idely established outside the regulated areas on the west coast.

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    Citation

    Oak, S.W.; Elledge, A.H.; Yockey, E.K.; Smith, W.D.; Tkacz, B.M. 2008. Phytophthora ramorum early detection surveys for forests in the United States, 2003-2006. In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M., tech. coords. 2008. Proceedings of the sudden oak death third science symposium. Gen. Tech. Rep. PSW-GTR-214. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 413-416

    Keywords

    Phytophthora ramorum, sudden oak death, survey, risk rating

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https://www.fs.usda.gov/treesearch/pubs/30229