E-Fauna BC: Electronic Atlas of the Wildlife of British Columbia

Choristoneura occidentalis (Walsingham)
Western Spruce Budworm
Family: Tortricidae
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E-Fauna BC Static Map
Distribution of Choristoneura occidentalis in British Columbia
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Introduction


The Western Spruce Budworm is a widespread destructive Nearctic moth species in western North America that feeds on coniferous trees. It is found in :the Rocky Mountains from Arizona and New Mexico northward into Colorado, Utah, Wyoming, Montana, and Idaho; in the Pacific Northwest in Oregon and Washington; and in British Columbia and Alberta, Canada" (US Department of Agriculture Forest Service 1992).

"The first recorded western spruce budworm outbreak was in 1909 on the southeastern part of Vancouver Island in British Columbia, Canada. Since that year, infestations of this and related species frequently have been reported in western Canada" (US Department of Agriculture Forest Service 1992).

Host tree species include: Douglas-fir (Pseudotsuga menziesi), grand fir (Abies grandis), subalpine fir (Abies lasiocarpa), Engelmann spruce (Picea engelmannii), white spruce (Picea glauca), and western larch (Larix occidentalis)

Status Information

Origin StatusProvincial StatusBC List
(Red Blue List)
COSEWIC
NativeSNRNo StatusNot Listed
BC Ministry of Environment: BC Species and Ecosystems Explorer--the authoritative source for conservation information in British Columbia.

Synonyms and Alternate Names

Choristoneura freemani

Additional Photo Sources

General References


Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2021. E-Fauna BC: Electronic Atlas of the Fauna of British Columbia [efauna.bc.ca]. Lab for Advanced Spatial Analysis, Department of Geography, University of British Columbia, Vancouver. [Accessed: 2021-09-25 2:27:04 PM]
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