4 edition of The western spruce budworm dynamics model found in the catalog.
1991 by U.S. Dept. of Agriculture, Forest Service, Intermountain Research Station in Ogden, Utah .
Written in English
|Statement||Nicholas L. Crookston.|
|Series||General technical report INT -- 283.|
|Contributions||Intermountain Research Station (Ogden, Utah)|
|The Physical Object|
|Pagination||25 p. :|
|Number of Pages||25|
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Get this from a library. The western spruce budworm dynamics model: version update and notes on behavior. [Nicholas L Crookston; Intermountain Research Station (Ogden, Utah)].
Additional Physical Format: Online version: Western spruce budworm model. [Portland Or.]: U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research.
Summary The Budworm Model simulates the population dynamics of the western spruce budworm (Choristoneura occidentalis Freeman) to predict defoliation caused by budworms. Western Spruce Budworm.
Western spruce budworm is the most widely distributed forest defoliator in western North America. Budworms have a one-year life cycle and are actually a small moth at full maturity.
Here in the West, there can be severe infestations in healthy Douglas-fir, white fir and spruce. The ODE model developed in Ludwig et al. () for the dynamics of the budworm– forest interaction is a three-variable system based upon the dynamics of the budworm population size and the.
Dynamics and Management of Rising Outbreak Spruce Budworm Populations Article (PDF Available) in Forests 10(9) September with Reads How we measure 'reads'.
Budworm outbreaks may be sustained for 25 years or more. Host trees: Primarily Douglas-fir, with other tree species such as the true firs, larch and to a lesser degree, spruce, also impacted by the western spruce budworm.
Description and life cycle: The western spruce budworm. Western spruce budworm (WSBW) is a common defoliating insect that has caused extensive damage and mortality to a number of tree species across the western Author: Bingbing Xu, Jeffrey A. Hicke, John T. Abatzoglou. Top photo: Western spruce budworm defoliated branches of a Douglas-fir in Montana.
Bottom image: The Wildland-Urban Interface Fire Dynamics Simulator is used to model western spruce budworm-induced foliage reduction. This image shows a defoliated. The spruce budworm is a normal part of forest ecosystems in Canada.
However a cyclical surge in population typically occurs every years which can lead to. Inwestern spruce budworm activity was highly apparent in Douglas-fir and grand fir forests of the eastern slope of the Cascade Mountains north of I and across parts of northeastern Washington.
Many people noticed defoliated .