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    Author(s): V.M. Carolin
    Date: 1980
    Source: Res. Pap. PNW-RP-273. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 24 p
    Publication Series: Research Paper (RP)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (1.01 MB)

    Description

    Sampling studies on western spruce budworm and Modoc budworm disclosed a substantial number of associated insect species at the time larvae were in opening buds. About 20 species occur with sufficient regularity to justify identification by field crews.

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    Citation

    Carolin, V.M. 1980. Larval densities and trends of insect species associated with spruce budworms in buds and shoots in Oregon and Washington. Res. Pap. PNW-RP-273. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 24 p

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    Keywords

    Insect populations, reproductive behavior (insect), western spruce budworm, identification (insect), Choristoneura occidentalis, Modoc budworm, Choristoneura viridis

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