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Day-to-day survival of late-instar western spruce budworm larvae and pupae.Author(s): Robert W. Campbell; Nilima Srivastava
Source: Res. Note PNW-RN-408. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 5 p
Publication Series: Research Note (RN)
Station: Pacific Northwest Research Station
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DescriptionFor the western spruce budworm populations studied, day-to-day survival rates were close to constant in the interval from instar IV to residual pupae. In any given crown stratum, host-tree species, and site, day-to-day changes across this interval could be approximated very closely by the Malthusian equation Nt = N0eαt.
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CitationCampbell, Robert W.; Srivastava, Nilima. 1984. Day-to-day survival of late-instar western spruce budworm larvae and pupae. Res. Note PNW-RN-408. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 5 p
Keywordsinsect populations, western spruce budworm, Choristoneura occidentalis
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