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Population dynamics of the major North American needle-eating budworms.Author(s): Robert W. Campbell
Source: Res. Pap. PNW-RP-463. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 242 p
Publication Series: Research Paper (RP)
Station: Pacific Northwest Research Station
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DescriptionData from six western States provided 1,251 life tables representing western spruce budworm, Chodstoneura occidentalis Freeman. These data provided projection capabilities for defoliation and successive budworm densities, as well as a basis for comparing survival rates among the three principal North American needle-eating budworms (western and eastern spruce budworms, and the jack pine budworm). Several modifications are suggested in current methods for managing budworm-susceptible forests, and suggestions are provided for further studies on the budworm life systems.
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CitationCampbell, Robert W. 1993. Population dynamics of the major North American needle-eating budworms. Res. Pap. PNW-RP-463. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 242 p
KeywordsWestern spruce budworm, eastern spruce budworm, jack pine budworm, life table, population dynamics, survival, site and stand attributes, interstand influences, year-to-year changes, insecticide treatment, weather, Choristoneura, predators, birds, ants, density dependence, host defenses, hazard rating
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