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    Author(s): Karen M. Clancy
    Date: 1991
    Source: In: Baranchikov, Yuri N.; Mattson, William J.; Hain, Fred P.; Payne, Thomas L., eds. Forest Insect Guilds: Patterns of Interaction with Host Trees; 1989 August 13-17; Abakan, Siberia, U.S.S.R. Gen. Tech. Rep. NE-153. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station: 123-133.
    Publication Series: Paper (invited, offered, keynote)
    Station: Northeastern Research Station
    PDF: View PDF  (609.0 KB)

    Description

    Variation in levels of herbivory within and among plants can be attributed to many mechanisms, such as differences in a) host nutritional quality, b) suitability of the physical environment, and c) abundance of competitor consumers or natural enemies (Mattson et al. 1982, Denno and McClure 1983, Mattson and Scriber 1987, Clancy et al. 1988a, 1988b, Mattson et al. 1988). To test the hypothesis that variation in host plant nutritional quality is a significant mechanism in plant resistance against herbivores, I have selected western spruce budworm, Choristoneura occidentalis (Lepidoptera: Tortricidae), and Douglas-fir, Pseudotsuga menziesii, for use as a model system.

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    Citation

    Clancy, Karen M. 1991. Douglas-fir nutrients and terpenes as potential factors influencing western spruce budworm defoliation. In: Baranchikov, Yuri N.; Mattson, William J.; Hain, Fred P.; Payne, Thomas L., eds. Forest Insect Guilds: Patterns of Interaction with Host Trees; 1989 August 13-17; Abakan, Siberia, U.S.S.R. Gen. Tech. Rep. NE-153. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station: 123-133.

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