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EFFECT OF LOW TEMPERATURES ON MORTALITY OF HIBERNATING CODLING MOTH LARVAE AND FERTILITY OF SURVIVING ADULTS (LEPIDOPTERA: OLETHREUTIDAE)

Published online by Cambridge University Press:  31 May 2012

E. A. C. Hagley
E. A. C. Hagley
Affiliation:
Research Station, Agriculture Canada, Vineland Station, Ontario
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Abstract

Mortality of hibernating codling moth larvae from the Georgian Bay area and the Niagara peninsula of southern Ontario was not affected after exposure to temperatures as low as −16.7°C for 48 h. One hundred per cent mortality occurred at −20.0°C after pre-conditioning the larvae for several weeks by exposure to gradually decreasing temperatures. In neither area were the minimum winter temperatures low enough nor of sufficient duration to significantly affect larval mortality. There was no effect on pupal or adult survival or on the fecundity and fertility of surviving adults following exposure of larvae to low temperatures.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 1 , January 1977 , pp. 123 - 127
Copyright
Copyright © Entomological Society of Canada 1977

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