The western spruce budworm model: structure and content.

K.A. Sheehan; W.P. Kemp; J.J. Colbert; N.L. Crookston

doi:10.2737/PNW-GTR-241

Treesearch

The western spruce budworm model: structure and content.

Informally Refereed

Authors:

K.A. Sheehan, W.P. Kemp, J.J. Colbert, N.L. Crookston

Year:

1989

Type:

General Technical Report

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-GTR-241

Source:

Gen. Tech. Rep. PNW-GTR-241. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 70 p

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Download (PDF 2.09 MB): https://research.fs.usda.gov/download/treesearch/9089.pdf

Abstract

The Budworm Model predicts the amounts of foliage destroyed annually by the western spruce budworm, Choristoneura occidentalis Freeman, in a forest stand. The model may be used independently, or it may be linked to the Stand Prognosis Model to simulate the dynamics of forest stands. Many processes that affect budworm population dynamics are simulated in detail, including budworm and host phenology, larval growth and feeding, larval and adult dispersal, and the effects of natural enemies. This publication describes the structure, assumptions, and default parameter values of the Budworm Model.

Keywords

Model, population dynamics, insect populations, defoliation, stand growth and yield, western spruce budworm, Choristoneura occidentalis, Tortricidae

Citation

Sheehan, K.A.; Kemp, W.P.; Colbert, J.J.; Crookston, N.L. 1989. The western spruce budworm model: structure and content. Gen. Tech. Rep. PNW-GTR-241. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 70 p