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TEMPERATURE EFFECTS ON NON-DIAPAUSE DEVELOPMENT IN MAMESTRA CONFIGURATA (LEPIDOPTERA: NOCTUIDAE)1

Published online by Cambridge University Press:  31 May 2012

Clyde G. Bailey
Clyde G. Bailey
Affiliation:
Research Station, Agriculture Canada, Winnipeg, Manitoba
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Abstract

Differential survival and development rates were obtained for the bertha armyworm, Mamestra configurata Wlk., reared at nine constant temperatures. Eggs and larvae had high survival rates at temperatures ranging from 8 °C to 32 °C and pupae showed good survival between 8 °C and 28 °C. Eggs and larvae did not complete development at 6° and 36 °C; and 32 °C was lethal for pupae. Duration of the egg, larval, and pupal stages decreased as the temperature increased from 8 °C to 28 °C. When duration and developmental rates were plotted against temperatures, the observed points did not differ significantly from curves formulated from the logistic equation 1/y = K/(1 + ea−bx). With a developmental threshold of 7 °C, 82, 356, and 352 accumulated day-degrees above the threshold were required for development of eggs, larvae, and pupae, respectively.

Type
Articles
Information
The Canadian Entomologist , Volume 108 , Issue 12 , December 1976 , pp. 1339 - 1344
Copyright
Copyright © Entomological Society of Canada 1976

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