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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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References

Ainslie, C. N. (1920). The Western grass-stem sawfly.—U.S. Dep. Agric., Bull. 841, 27 pp.Google Scholar
Criddle, N. (1922). The Western wheat-stem sawfly in Canada.—52nd Ann. Rep. Ent. Soc. Ont., 1921, pp. 18–22.Google Scholar
Fisher, R. A. (1928). Statistical Methods for Research Workers.—London.Google Scholar
Howard, L. O. (1897).A study in insect parasitism.—U.S. Dep. Agric. Div. Ent. Tech. Ser. no. 5, 57 pp.Google Scholar
Nicholson, A. J. (1933). The balance of animal populations.—J. Anim. Ecol., 2, pp. 132–178.CrossRefGoogle Scholar
Nicholson, A. J. & Bailey, V. A. (1935). The balance of animal populations, Pt. 1.—Proc. Zool. Soc., 1935, pp. 551–598.CrossRefGoogle Scholar
Picard, F. & Rabaud, E. (1914). Sur le parasitisme externe des Braconides.—Bull. Soc. ent. Fr., 1914, pp. 266–269.CrossRefGoogle Scholar
Salt, G. (1931). Parasites of the wheat-stem sawfly, Cephus pygmaeus, Linnaeus, in England.—Bull. Ent. Res., 22, pp. 479–545.CrossRefGoogle Scholar
Thompson, W. R. (1930). The biological control of insect and plant pests.—E. M. B. 29, 124 pp.Google Scholar
Thompson, W. R. (1939). Biological control and the theories of the interactions of popula tions.—Parasitology, 31, pp. 299–388.CrossRefGoogle Scholar
Walker, M. G. (1937). A mathematical analysis of superparasitism by Collyria calcitrator, Grav.—Parasitology, 24, pp. 477–503.CrossRefGoogle Scholar