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Research ArticleRefereed Research

First detection in the US: new plant pathogen, Phytophthora tentaculata, in native plant nurseries and restoration sites in California

Suzanne Rooney-Latham, Cheryl L Blomquist, Tedmund Swiecki, Elizabeth Bernhardt and Susan J Frankel
Native Plants Journal, March 2015, 16 (1) 23-27; DOI: https://doi.org/10.3368/npj.16.1.23
Suzanne Rooney-Latham
Senior Plant Pathologist, California Department of Food & Agriculture, 3294 Meadowview Road, Sacramento, CA 95832,
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  • For correspondence: [email protected]
Cheryl L Blomquist
Senior Plant Pathologist, Supervisor, California Department of Food & Agriculture, 3294 Meadowview Road, Sacramento, CA 95832,
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Tedmund Swiecki
Principal / Plant Pathologist, Phytosphere Research, 1027 Davis Street, Vacaville, CA, 95687,
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Elizabeth Bernhardt
Principal / Plant Pathologist, Phytosphere Research, 1027 Davis Street, Vacaville, CA, 95687,
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Susan J Frankel
Plant Pathologist, USDA Forest Service, Pacific Southwest Research Station, 800 Buchanan Street, West Annex Building, Albany, CA 94710-0011,
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Abstract

Phytophthora tentaculata Kröber & Marwitz (Pythiaceae) has been detected in several native plant nurseries in 4 California counties and in restoration sites on orange sticky monkey flower (Diplacus aurantiacus (W. Curtis) Jeps. subsp. aurantiacus [Scrophulariaceae]), toyon (Heteromeles arbutifolia (Lindl.) M. Roem. [Rosaceae]), coffeeberry (Frangula californica (Eschsch.) A. Gray [Rhamnaceae]), and sage (Salvia spp. L. [Lamiaceae]). These findings are the first detections of P. tentaculata in the US and the first ever on these host plants. Phytophthora species are a known problem in horticultural nurseries, but little attention has been placed on native plant or restoration nurseries. The potential for plant pathogens to be outplanted along with native plant nursery stock is very high, posing a threat to neighboring forests.

  • Diplacus aurantiacus subsp. aurantiacus
  • Heteromeles arbutifolia
  • Frangula californica
  • Salvia
  • native plant nursery propagation
  • reforestation
  • forest pathogens
  • plant disease prevention
  • Pythiaceae
  • Scrophulariaceae
  • Rosaceae
  • Rhamnaceae
  • Lamiaceae
NOMENCLATURE:
  • Plants: USDA NRCS (2014)
  • Fungus: Phytophthora database, http://www.phytophthoradb.org (Park and others 2013)

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Native Plants Journal: 16 (1)
Native Plants Journal
Vol. 16, Issue 1
20 Mar 2015
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First detection in the US: new plant pathogen, Phytophthora tentaculata, in native plant nurseries and restoration sites in California
Suzanne Rooney-Latham, Cheryl L Blomquist, Tedmund Swiecki, Elizabeth Bernhardt, Susan J Frankel
Native Plants Journal Mar 2015, 16 (1) 23-27; DOI: 10.3368/npj.16.1.23

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First detection in the US: new plant pathogen, Phytophthora tentaculata, in native plant nurseries and restoration sites in California
Suzanne Rooney-Latham, Cheryl L Blomquist, Tedmund Swiecki, Elizabeth Bernhardt, Susan J Frankel
Native Plants Journal Mar 2015, 16 (1) 23-27; DOI: 10.3368/npj.16.1.23
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Keywords

  • Diplacus aurantiacus subsp. aurantiacus
  • Heteromeles arbutifolia
  • Frangula californica
  • Salvia
  • native plant nursery propagation
  • reforestation
  • forest pathogens
  • plant disease prevention
  • Pythiaceae
  • Scrophulariaceae
  • Rosaceae
  • Rhamnaceae
  • Lamiaceae
  • Plants: USDA NRCS (2014)
  • Fungus: Phytophthora database, http://www.phytophthoradb.org (Park and others 2013)
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