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SOME FACTORS INFLUENCING DIAPAUSE

Published online by Cambridge University Press:  31 May 2012

F. J. Simmonds
F. J. Simmonds
Affiliation:
Commonwealth Bureau of Biological Control
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Extract

In a previous paper (Simmonds 1946) a curious factor affecting diapause in insects was recorded. In two species of parasitic Hymenoptera the age of the parent female at the time of oviposition has a marked effect on the tendency of the resulting larva to enter a state of diapause when full-grown. The older the female at the time of oviposition the greater is the chance that an egg will produce a larva entering diapause. In a second paper (Simmonds 1948) this maternal influence on the tendencies of her progeny to enter diapause was investigated further. Some general conclusions were drawn as to the nature of diapause, and the experiments were considered in the light of the various theories put forward to explain the phenomenon. In brief it was concluded that the underlying cause of diapause is the occurrence of a physiological disturbance at some stage in the life-history.

Type
Articles
Information
The Canadian Entomologist , Volume 79 , Issue 11-12 , December 1947 , pp. 226 - 232
Copyright
Copyright © Entomological Society of Canada 1947

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References

REFERENCES

Simmonds, F. J. 1944 The propagation of insect parasites on unnatural hosts. Bull. Ent. Res. 35, 219–226.CrossRefGoogle Scholar
Simmonds, F. J. 1946 A factor affecting diapause in hymenopterous parasites. Bull. Ent. Res. 37, 95–97.CrossRefGoogle Scholar
Simmonds, F. J. 1948 The influence of maternal physiology on the incidence of diapause. (In process of publication).Google Scholar