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The Relation of Weather to Population Trends of the Black-headed Budworm Acleris variana (Fern.) (Lepidoptera: Tortricidae)1

Published online by Cambridge University Press:  31 May 2012

G. T. Silver
G. T. Silver
Affiliation:
Forest Biology Laboratory, Victoria, B.C.
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Extract

The history of the black-headed budworm, Acleris variana (Fern.), in the western hemlock (Tsuga heterophylla (Raf.) Sarg.) forests of coastal British Columbia is one of recurring cycles of outbreaks. The latest cycle occurred from 1952 to 1957 and was represented by three main outbreaks in the Portland Canal area from Prince Rupert to Stewart, the Queen Charlotte Islands, and on northern Vancouver Island. Previous to this, groups of West Coast outbreaks were recorded from 1940 to 1945, and from 1927 to 1931 (Prebble and Graham, 1945a).

Information

Type
Articles
Information
The Canadian Entomologist , Volume 92 , Issue 6 , June 1960 , pp. 401 - 410
Copyright
Copyright © Entomological Society of Canada 1960

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References

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Prebble, M. L., and Graham, K.. 1945b. The current outbreak of defoliating insects in coast hemlock forests of British Columbia. Part II. Factors of natural control. B.C. Lumberman 29(3): 37–39, 88, 90, 92.Google Scholar
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