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    Author(s): David G. Fellin; Wyman C. Schmidt
    Date: 1973
    Source: Gen. Tech. Rep INT-GTR-7. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station. 25 p.
    Publication Series: General Technical Report (GTR)
    Station: Intermountain Forest Experiment Station
    PDF: View PDF  (8.82 MB)

    Description

    This pictorial describes how western spruce budworm larvae feed on young western larch and the trees' responses to this damage. Larvae feed not only on the current year's foliage-their usual diet on most coniferous hosts-but also sever stems of current year's shoots. Multiple-topped, bushlike trees develop in direct response to the amount and type of damage. As a result, trees cannot maintain straight boles and good form. Sustained budworm damage could conceivably influence the management of western larch-one of the more important conifers in the northern Rockies.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Fellin, David G.; Schmidt, Wyman C. 1973. How does western spruce budworm feeding affect western larch? Gen. Tech. Rep INT-GTR-7. Ogden, UT: U.S. Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station. 25 p.

    Keywords

    Lepidoptera (-forest damage), shoot damage, western spruce budworm, Choristoneura occidentalis Freeman, western larch, Larix occidentalis Nutt.

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