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A Device for Measuring the Oviposition Potential of a Bark Beetle Parasite1

Published online by Cambridge University Press:  31 May 2012

Roger B. Ryan
Roger B. Ryan
Affiliation:
Pacific Northwest Forest and Range Experiment Station, U.S. Forest Service, Portland, Oregon
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Extract

Some bark beetle parasites insert their ovipositors through the bark of trees to lay their eggs on their hosts. To be parasitized, therefore, host insects must be beneath a thickness of bark less than the parasite ovipositor length. Bark thickness varies at different heights in a tree, but even at a given height the thickness is not uniform because of the fissures. The percentage of bark beetles parasitized by this type of parasite at a given height in a tree is influenced by the percentage of the bark which has a thickness less than the parasite ovipositor length.

Type
Articles
Information
The Canadian Entomologist , Volume 94 , Issue 7 , July 1962 , pp. 737 - 738
Copyright
Copyright © Entomological Society of Canada 1962

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References

Ryan, R. B., and Rudinsky, J. A.. 1962. Biology and habits of the Douglas-fir beetle parasite, Coeloides brunneri Viereck (Hymenoptera : Braconidae), in Western Oregon. Can. Ent. 94: 748–763.CrossRefGoogle Scholar