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    Author(s): Gabriella Zilahi-Balogh; Scott M. Salom; L. T. Kok
    Date: 2000
    Source: In: McManus, Katherine A.; Shields, Kathleen S.; Souto, Dennis R., eds. Proceedings: Symposium on sustainable management of hemlock ecosystems in eastern North America. Gen. Tech. Rep. NE-267. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. p.110.
    Publication Series: General Technical Report (GTR)
    Station: Northeastern Research Station
    PDF: View PDF  (86.95 KB)

    Description

    Laricobius nigrinus (Coleoptera: Derodontidae) is being evaluated as a potential biological control agent of hemlock woolly adelgid (HWA), Adelges tsugae (Homoptera: Adelgidae) Annand in eastern North America. HWA is not considered a pest on western species of hemlock (McClure et al. 1996). A combination of natural enemies and host resistance likely play an important role in maintaining levels of HWA below economic thresholds. We are studying L. nigrinus because it may play a role in regulating HWA abundance.

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    Citation

    Zilahi-Balogh, Gabriella; Salom, Scott M.; Kok, L. T. 2000. Host suitability and preference of Laricobius nigrinus (Fender) (Coleoptera: Derodontidae): a predatory beetle for potential biological control of Adelges tsugae (Annand) (Homoptera: Adelgidae). In: McManus, Katherine A.; Shields, Kathleen S.; Souto, Dennis R., eds. Proceedings: Symposium on sustainable management of hemlock ecosystems in eastern North America. Gen. Tech. Rep. NE-267. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. p.110.

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