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Stability of Grain as a Factor influencing the Oviposition Rate of the Grain Weevil, Calandra granaria (L.) (Col., Curculionidae)

Published online by Cambridge University Press:  10 July 2009

C. W. Coombs
C. W. Coombs
Affiliation:
Department of Scientific and Industrial Research, Pest Infestation Laboratory, Slough.
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Extract

In order to estimate the effect of cracks in floors upon the oviposition rate of Calandra granaria (L.) in an unstocked granary, grain was presented to adults in six ways. The grain was either fixed or loose. Fixation was achieved either by placing grain in cracks in wood or plaster of Paris, or by gumming (in rows or scattered) to glass. The loose grains lay upon glass or plaster of Paris.

A significantly greater number of eggs was laid upon grain that was fixed. The fact that the grains were in rows and partially enclosed when in cracks had no greater effect than fixing with gum. There was no significant departure from a random distribution of eggs in grains when the latter were in cracks.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 47 , Issue 4 , December 1956 , pp. 737 - 740
Copyright
Copyright © Cambridge University Press 1956

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References

Frankenfeld, J. C. (1948). Staining methods for detecting weevil infestation in grain.—U.S. Dep. Agric. Bur. Ent., ET-256, 4 pp. multigraph.Google Scholar
Richards, O. W. (1947). Observations on grain-weevils, Calandra (Col., Curculionidae). I. General biology and oviposition.—Proc. zool. Soc., 117, pp. 1–43.CrossRefGoogle Scholar