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    Author(s): Laura Ingwell; Joseph Brady; Matthew Fitzpatrick; Brian Maynard; Richard Casagrande; Evan Preisser
    Date: 2009
    Source: In: McManus, Katherine A; Gottschalk, Kurt W., eds. Proceedings. 20th U.S. Department of Agriculture interagency research forum on invasive species 2009; 2009 January 13-16; Annapolis, MD. Gen. Tech. Rep. NRS-P-51. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 80.
    Publication Series: Other
    Station: Northern Research Station
    PDF: View PDF  (119.7 KB)


    Three groups of eastern hemlock (Tsuga canadensis Carr.) trees were analyzed to compare their chemical composition and the potential for naturally occurring resistance to hemlock woolly adelgid (Adelges tsguae Annand; HWA).

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    Ingwell, Laura; Brady, Joseph; Fitzpatrick, Matthew; Maynard, Brian; Casagrande, Richard; Preisser, Evan. 2009. Intraspecific variation in Tsuga canadensis foliar chemistry

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