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    Author(s): M.A. Radwan
    Date: 1978
    Source: Res. Note PNW-RN-324. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 6 p.
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (331.25 KB)

    Description

    Yield and composition of essential oils were compared in foliage of Douglas-fir. Five clones with different susceptibilities to deer browsing were used; foliage was collected during the dormant season. There were no qualitative differences among the oils of the different clones, but the oils differed quantitatively in all variables measured. Eight variables appeared useful in separating resistant from susceptible clones. Only one compound, however, an unidentified chemical, seemed capable of distinguishing between all three deer browsing preference classes.

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    Citation

    Radwan, M.A. 1978. Foliar essential oils and deer browsing preference of Douglas-fir genotypes. Res. Note PNW-RN-324. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 6 p.

    Keywords

    Essential oils chemistry, browse preference, genotypes, Douglas-fir, Pseudotsuga menziesii, deer, black-tailed

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