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  1. Degree-day accumulation related to the phenology of Douglas-fir tussock moth and white fir during five seasons of monitoring in southern Oregon.

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    Author(s): Boyd E. Wickman
    Date: 1981
    Source: Res. Note PNW-RN-392. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 10 p
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    DOI: https://doi.org/10.2737/PNW-RN-392
    PDF: View PDF  (124 KB)

    Description

    Heat units were accumulated during the spring and early summer for five seasons to relate degree-days to tussock moth and host tree phenology. Little variation in the pattern and date of the phenological events was found during the five seasons of monitoring near Fort Klamath, southern Oregon.

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    Citation

    Wickman, Boyd E. 1981. Degree-day accumulation related to the phenology of Douglas-fir tussock moth and white fir during five seasons of monitoring in southern Oregon. Res. Note PNW-RN-392. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 10 p

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    Keywords

    Phenology, insect populations, bud burst, Douglas-fir tussock moth, Orgyia pseudotsugata, white fir, Abies concolor

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