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Effects of Defoliation on Survival of Larvae of the Larch Sawfly Pristiphora erichsonii (Htg.)1

Published online by Cambridge University Press:  31 May 2012

W. G. H. Ives
W. G. H. Ives
Affiliation:
Forest Entomology Laboratory, Box 6300, Winnipeg 1, Manitoba
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Abstract

The searching behaviour of fifth-instar larch sawfly larvae on artificially defoliated tamarack branches and trees is discussed. Local defoliation is shown to be capable of causing appreciable mortality among early-instar larvae if feeding damage by earlier colonies forces them to wander in search of food. Air temperature affects the distance and rate of such larval movement. A considerable proportion of dislodged fifth-instar larvae are able to reach foliage and resume feeding on nearby host trees.

Type
Articles
Information
The Canadian Entomologist , Volume 95 , Issue 8 , August 1963 , pp. 887 - 892
Copyright
Copyright © Entomological Society of Canada 1963

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References

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