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Filtering by: Subject Western tentiform leafminer--Control Remove constraint Subject: Western tentiform leafminer--Control Advisor Ross, Darrell W. Remove constraint Advisor: Ross, Darrell W.

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  • Western larch resistance to Douglas-fir beetle attack

    Creator:
    Neal, Tiffany A.
    Abstract:
    Live western larch, Larix occidentalis Nutt., a tree species resistant to the Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, produces the monoterpene 3-carene in higher concentrations compared to Douglas-fir, the preferred host of D. pseudotsugae (Reed et al. 1986). The inhibitory effects on attraction to aggregation pheromones and toxicity of 3-carene to...
    Resource Type:
    Masters Thesis
    Full Text:
    degree of Master of Science in Forest Science presented on January 15. 2004. Title: Western Larch

  • Predators associated with hemlock woolly adelgid (Hemiptera: Adelgidae) infested western hemlock in the Pacific Northwest.

    Creator:
    Kohler, Glenn R.
    Abstract:
    The hemlock woolly adelgid, Adelges tsugae, is causing widespread mortality of eastern hemlock, Tsuga canadensis, in the eastern United States. In the West, A. tsugae causes negligible damage to western hemlock, Tsuga heterophylla. Host tolerance traits and presence of endemic predators may be contributing to the relative tolerance of western...
    Resource Type:
    Masters Thesis
    Full Text:
    little control. It has also reportedly been recovered from A. tsugae on western hemlock (Schooley et