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Notes on the Distribution of Cephus Pygmaeus, Linn., and of its Parasite, Collyria calcitrator, Gray

Published online by Cambridge University Press:  10 July 2009

Marjory G. Walker
Marjory G. Walker
Affiliation:
Imperial Institute of Entomology, Farnham House Laboratory.
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Extract

The wheat crops in certain districts of England are attacked every year by the wheat-stem sawfly, which in its turn acts as host to various species of parasitic insects. The aim of the present investigation is to try to discover from an analysis of records if any sort of simple numerical relations exist within the complex including the wheat field, the sawflies which infest the wheat-stalks, and the parasites which attack the sawflies. The results of this work lead to a discussion of the peculiar difficulties involved in the application of mathematics to the study of animals and plants in their natural environments.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 30 , Issue 4 , January 1940 , pp. 551 - 573
Copyright
Copyright © Cambridge University Press 1940

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