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Publication Information

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Title: Population dynamics of the major North American needle-eating budworms.

Author: Campbell, Robert W.;

Date: 1993

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)

Description: Data 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.

Keywords: Western 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

Publication Notes:

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
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Citation:


Campbell, 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

 


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