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Photoperiod Control of an ‘Obligatory’ Pupal Diapause

Published online by Cambridge University Press:  31 May 2012

Ajai Mansingh  and
B. N. Smallman
Ajai Mansingh
Affiliation:
Department of Biology, Queen's University, Kingston, Ontario
B. N. Smallman
Affiliation:
Department of Biology, Queen's University, Kingston, Ontario
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Abstract

Evidence is provided that an obligatory pupal diapause is controlled by photoperiod. Diapause in H. cecropia is induced and maintained by a 12-hour photoperiod, and prevented or terminated by a 17-hour photoperiod; in either case, the incidence of diapause is graded according to the developmental stage at which the light regime is imposed. The validity of the distinction between "facultative" and "obligatory" diapause is discussed in the light of these results.

Type
Articles
Information
The Canadian Entomologist , Volume 98 , Issue 6 , June 1966 , pp. 613 - 616
Copyright
Copyright © Entomological Society of Canada 1966

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References

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