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MAJOR FACTORS IN SURVIVAL OF THE IMMATURE STAGES OF FENUSA PUSILLA IN SOUTHWESTERN QUEBEC1

Published online by Cambridge University Press:  31 May 2012

H. H. Cheng  and
E. J. LeRoux
H. H. Cheng
Affiliation:
Department of Entomology, Macdonald College of McGill University, Macdonald College P.O., Quebec
E. J. LeRoux
Affiliation:
Department of Entomology, Macdonald College of McGill University, Macdonald College P.O., Quebec
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Abstract

Intensive studies on the population dynamics of the birch leaf miner, Fenusa pusilla (Lepeletier), were carried out in two stands of blue birch at the Morgan Arboretum, Macdonald College, Que., from 1964 to 1966. Life tables for nine and two generations, respectively, showed that mortality of the immature stages was lower on 3- to 5-year-old trees than on 9-year-old trees. The analysis of successive age-interval survivals in relation to generation survival revealed that predation during the late larval stages was the key factor in generation survival of the insect on the younger trees. Desiccation of the leaf during the early larval stages along with predation were key factors on the older trees.

Type
Articles
Information
The Canadian Entomologist , Volume 102 , Issue 8 , August 1970 , pp. 995 - 1002
Copyright
Copyright © Entomological Society of Canada 1970

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References

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