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DIAPAUSE TERMINATION IN OVERWINTERING PUPAE OF RHEUMAPTERA HASTATA (LEPIDOPTERA: GEOMETRIDAE) IN INTERIOR ALASKA

Published online by Cambridge University Press:  31 May 2012

Richard A. Werner
Richard A. Werner
Affiliation:
Pacific Northwest Forest and Range Experiment Station, USDA Forest Service, Institute of Northern Forestry, Fairbanks, Alaska
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Abstract

A method was developed to terminate pupal diapause in Rheumaptera hastata through experimentation using controlled abiotic factors. Male and female pupae exposed to 0 °C at 75–100% moisture content for 90–120 days terminated diapause within 8–19 days following treatment. This method reduces diapause by 4 months compared with natural conditions. Light had a minimum effect on diapause termination; therefore, pupae should be exposed to constant darkness during the treatment period, followed by exposure to a 20L:4D photoperiod to obtain a high percentage of adult emergence.

Type
Articles
Information
The Canadian Entomologist , Volume 109 , Issue 8 , August 1977 , pp. 1149 - 1152
Copyright
Copyright © Entomological Society of Canada 1977

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