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CHARACTERISTICS OF SPRUCE BEETLE (COLEOPTERA) INFESTATION IN FELLED WHITE SPRUCE IN ALASKA

Published online by Cambridge University Press:  31 May 2012

Malcolm M. Furniss ,
Bruce H. Baker ,
Richard A. Werner  and
Larry C. Yarger
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Abstract

The antiaggregation pheroraone MCH was ineffective in preventing spruce beetle infestation in felled spruce near Hope, Alaska. In October, most progeny were larvae but some were pupae and new adults. Densities of spruce beetle attacks and progeny on the shaded under side of stems were about twice those on the upper side, whereas attacks of Polygraphus rufipennis (Kirby) and Dryocoetes affaber (Mann.) on the upper side were 100 times those on the under side. Ips tridens engelmanni Swain was present in only 2% of bark samples. Entomophagous insects were scarce; only Medetera sp. and Coeloides sp. were found. Spruce beetle progeny were 45 times more abundant than attacking parents. Factors affecting the efficiency of sampling spruce beetle attacks and progeny are discussed.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 12 , December 1979 , pp. 1355 - 1360
Copyright
Copyright © Entomological Society of Canada 1979

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