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    Author(s): S. E. Bentz; Robert J. Griesbach; Margaret R. Pooler; A. M. Townsend
    Date: 2007
    Source: In: Gottschalk, Kurt W., ed. Proceedings, 17th U.S. Department of Agriculture interagency research forum on gypsy moth and other invasive species 2006; Gen. Tech. Rep. NRS-P-10. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 24-25.
    Publication Series: General Technical Report - Proceedings
    Station: Northern Research Station
    PDF: View PDF  (43.7 KB)

    Description

    The eastern North American native hemlock species, T. canadensis [L.] Carriere and T. caroliniana Engelm., are highly susceptible to injury from the hemlock woolly adelgid (HWA), while the Asian species, T. chinensis (Franch.) E. Pritz., T. diversifolia (Maxim.) Mast., and T. sieboldii Carriere, are reported to show more tolerance (McClure 1992, 1995). In western North America, the adelgid is not considered a pest problem, although it has been documented on the two native species, T. mertensiana (Bong.) Carriere and T. heterophylla (Raf.) Sarg. since the early 1900s. In Japan and China, HWA appears to be a relatively minor pest of T. chinensis, T. diversifolia, and T. sieboldii whose impact is limited by natural enemies, host resistance, and scattered distribution (McClure 1996, 1995, 1992, Montgomery 1999).

    Publication Notes

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    Citation

    Bentz, S. E.; Griesbach, Robert J.; Pooler, Margaret R.; Townsend, A. M. 2007. Tsuga chinensis as a source of host resistance to the hemlock woolly adelgid. In: Gottschalk, Kurt W., ed. Proceedings, 17th U.S. Department of Agriculture interagency research forum on gypsy moth and other invasive species 2006; Gen. Tech. Rep. NRS-P-10. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 24-25.

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