Foliar essential oils and deer browsing preference of Douglas-fir genotypes

M.A. Radwan

Treesearch

Foliar essential oils and deer browsing preference of Douglas-fir genotypes

Informally Refereed

Authors:

M.A. Radwan

Year:

1978

Type:

Research Note

Station:

Pacific Northwest Research Station

Source:

Res. Note PNW-RN-324. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 6 p.

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Download (PDF 339 KB): https://research.fs.usda.gov/download/treesearch/40656.pdf

Abstract

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.

Keywords

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

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.