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TRENDS OF CODLING MOTH (LEPIDOPTERA: OLETHREUTIDAE) POPULATIONS OVER 12 YEARS ON TWO CULTIVARS IN AN INSECTICIDE FREE ORCHARD1

Published online by Cambridge University Press:  31 May 2012

C. R. MacLellan
C. R. MacLellan
Affiliation:
Research Station, Agriculture Canada, Kentville, Nova Scotia B4N 1J5
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Abstract

The populations of Laspeyresia pomonella (L.) on two cultivars in an insecticide free orchard showed similar trends over a 12-year period. Infestation of fruit was greater on the cultivar with the larger annual crop. Predation of eggs on the cultivar Delicious was greater than on the cultivar McIntosh. Mortality of neonate larvae was greater on McIntosh. Egg-to-egg survival ratios varied from 0.23 to 6.83. The average generation survival of egg to adult for the 12-year period was near 10% which confirms an earlier value established empirically.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 12 , December 1977 , pp. 1555 - 1562
Copyright
Copyright © Entomological Society of Canada 1977

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