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Moisture and Diapause in the Wheat Stem Sawfly, Cephus cinctus Nort. (Hymenoptera: Cephidae)1

Published online by Cambridge University Press:  31 May 2012

Norman Stanley Church
Norman Stanley Church
Affiliation:
Field Crop Insect Section, Science Service Laboratory, Lethbridge, Alberta
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Extract

Dryness of either an insect's habitat or its food has often been reported as inducing diapause. This has been well substantiated in Pectinophora (8, 21, 22) and Loxostege (23). Also, a difference in body moisture between forms of the same species, in diapause and not in diapause, has been recorded in Leptinotarsa (9), Lucilia (11), and Carpocapsa (24), there being less water in the insects in diapause. It is significant, though, that in preparing for diapause Leptinotarsa achieves a reduction in moisture content, even when there is an abundance of water outside, by excretion (4).

Type
Articles
Information
The Canadian Entomologist , Volume 87 , Issue 2 , February 1955 , pp. 85 - 97
Copyright
Copyright © Entomological Society of Canada 1955

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