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SEQUENTIAL EGG-BAND SAMPLING AND PROBABILITY METHODS OF PREDICTING DEFOLIATION BY MALACOSOMA DISSTRIA (LASIOCAMPIDAE: LEPIDOPTERA)

Published online by Cambridge University Press:  31 May 2012

R. F. Shepherd  and
C. E. Brown
R. F. Shepherd
Affiliation:
Forest Research Laboratory, Canadian Forestry Service, Calgary, Alberta
C. E. Brown
Affiliation:
Canadian Forestry Service, Ottawa, Ontario
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Abstract

A sequential egg-band sampling system for predicting defoliation of aspen by the forest tent caterpillar (Malacosoma disstria Hbn.) is described and its accuracy assessed. A probability method of predicting defoliation from the stage of the outbreak in each local area is also established. A third method, which promises to be the most accurate and consistent, is proposed. In this last system, egg-mass density is established and related to defoliation levels which are adjusted depending upon age of outbreak.

Type
Articles
Information
The Canadian Entomologist , Volume 103 , Issue 10 , October 1971 , pp. 1371 - 1379
Copyright
Copyright © Entomological Society of Canada 1971

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