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    Author(s): S. Rooney-Latham; C. L. Blomquist; T. Swiecki; E. Bernhardt; S.J. Frankel
    Date: 2015
    Source: Native Plants Journal. 16(1): 23-27
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (645.49 KB)


    Phytophthora tentaculata Kröber & Marwitz, has been detected in several native plant nurseries in 4 California counties and in restoration sites on orange sticky monkey flower (Diplacus aurantiacus subsp. aurantiacus (W. Curtis) Jeps. [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.

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    Rooney-Latham, S.; Blomquist, C.L.; Swiecki, T.; Bernhardt, E.; Frankel, S.J. 2015. First detection in the USA: new plant pathogen, Phytophthora tentaculata, in native plant nurseries and restoration sites in California. Native Plants Journal. 16(1): 23-27


    Diplacus aurantiacus subsp. aurantiacus, Heteromeles arbutifolia, Frangula californica, Salvia, native plant nursery propagation, reforestation, forest pathogens, plant disease prevention

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