02775nas a2200229 4500008004100000245013500041210006900176260001600245300000900261490000700270520202600277100002302303700002202326700002002348700001702368700001602385700001802401700002602419700002502445700002502470856005002495 2020 eng d00aPhytophthora Introductions in Restoration Areas: Responding to Protect California Native Flora from Human-Assisted Pathogen Spread0 aPhytophthora Introductions in Restoration Areas Responding to Pr cNov-30-2020 a12910 v113 a

Over the past several years, plantings of California native plant nursery stock in restoration areas have become recognized as a pathway for invasive species introductions, in particular Phytophthora pathogens, including first in the U.S. detections (Phytophthora tentaculata, Phytophthora quercina), new taxa, new hybrid species, and dozens of other soilborne species. Restoration plantings may be conducted in high-value and limited habitats to sustain or re-establish rare plant populations. Once established, Phytophthora pathogens infest the site and are very difficult to eradicate or manage—they degrade the natural resources the plantings were intended to enhance. To respond to unintended Phytophthora introductions, vegetation ecologists took a variety of measures to prevent pathogen introduction and spread, including treating infested areas by solarization, suspending plantings, switching to direct seeding, applying stringent phytosanitation requirements on contracted nursery stock, and building their own nursery for clean plant production. These individual or collective actions, loosely coordinated by the Phytophthoras in Native Habitats Work Group ensued as demands intensified for protection from the inadvertent purchase of infected plants from commercial native plant nurseries. Regulation and management of the dozens of Phytophthora species and scores of plant hosts present a challenge to the state, county, and federal agriculture officials and to the ornamental and restoration nursery industries. To rebuild confidence in the health of restoration nursery stock and prevent further Phytophthora introductions, a voluntary, statewide accreditation pilot project is underway which, upon completion of validation, is planned for statewide implementation.

1 aFrankel, Susan, J.1 aConforti, Christa1 aHillman, Janell1 aIngolia, Mia1 aShor, Alisa1 aBenner, Diana1 aAlexander, Janice, M.1 aBernhardt, Elizabeth1 aSwiecki, Tedmund, J. uhttps://www.mdpi.com/1999-4907/11/12/1291/htm01176nas a2200205 4500008004100000245006400041210006400105260012900169300001200298520042400310653001900734653002100753653002500774653002100799653001100820100002300831700002400854700002800878856006400906 2007 eng d00aProceedings of the sudden oak death third science symposium0 aProceedings of the sudden oak death third science symposium aSanta Rosa, CaliforniabAlbany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculturec2008 a491 pp.3 a

The Sudden Oak Death Third Science Symposium provided a forum for current research on sudden oak death, caused by the exotic, quarantine pathogen, Phytophthora ramorum. One hundred and seventeen submissions describing papers and posters on the following sudden oak death/ P. ramorum topics are included: biology, genetics, nursery, and wildland management, monitoring, ecology, and diagnostics.

10acoast live oak10ainvasive species10aPhytophthora ramorum10aSudden oak death10atanoak1 aFrankel, Susan, J.1 aKliejunas, John, T.1 aPalmieri, Katharine, M. uhttp://www.fs.fed.us/psw/publications/documents/psw_gtr214/01277nas a2200205 4500008004100000245009300041210006900134260012700203300001200330520049800342653001900840653002100859653002500880653002100905653001100926100002300937700002200960700002500982856006401007 2005 eng d00aProceedings of the sudden oak death second science symposium: the state of our knowledge0 aProceedings of the sudden oak death second science symposium the aMonterey, CaliforniabAlbany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculturec2006 a571 pp.3 a

The Sudden Oak Death Second Science Symposium provided a forum for current research on sudden oak death, caused by the exotic, quarantine pathogen, Phytophthora ramorum. Ninety papers and forty-six posters on the following sudden oak death/P. ramorum topics are included: biology, genetics, nursery and wildland management, monitoring, ecology, and diagnostics. Several papers on P. kernoviae and other forest Phytophthora species are also presented.

10acoast live oak10ainvasive species10aPhytophthora ramorum10aSudden oak death10atanoak1 aFrankel, Susan, J.1 aShea, Patrick, J.1 aHaverty, Michael, I. uhttp://www.fs.fed.us/psw/publications/documents/psw_gtr196/