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Effects of Temperature and Humidity on Toxicities of Three Insecticides to Larvae of the Codling Moth (Lepidoptera: Olethreutidae)1

Published online by Cambridge University Press:  31 May 2012

M. D. Proverbs
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Extract

Before the advent of synthetic organic insecticides, it was much more difficult to control the codling moth, Carpocapsa pomonella (L.), in arid, hot areas with a long growing season, as in the Pacific northwest, than in cooler areas such as Ontario, where there is more rainfall and usually a shorter growing season. As a rule, in all apple growing areas, the codling moth is most numerous during summers in which the temperatures are above normal, particularly if the prevailing temperatures are high at dusk, when the moth is ovipositing. Consequently, unsatisfactory control in hot, dry areas, such as the South Okanagan of British Columbia, was attributed largely to the direct and favorable influence of climate on codling moth development (Webster, 1936).

Type
Articles
Information
The Canadian Entomologist , Volume 89 , Issue 9 , September 1957 , pp. 423 - 428
Copyright
Copyright © Entomological Society of Canada 1957

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References

Cutright, C. R. 1931. Some laboratory reactions of young codling moth larvae. J. Econ. Ent. 24: 81–83.Google Scholar
Hough, W. S. 1934. Colorado and Virginia strains of codling moth in relation to their ability to enter sprayed and unsprayed apples, J. Agr. Res. 48: 533–553.Google Scholar
Steiner, L. F., and Arnold, C. H.. 1943. Influence of changes in relative humidity on the effect of certain insecticides on newly hatched codling moth larvae. J. Econ. Ent. 36: 117–118.Google Scholar
Webster, R. L. 1936. The relation of codling moth to temperature and rainfall. Proc. Washington State. Hort. Assoc., 32nd Ann. Meeting, pp. 133–141.Google Scholar