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The Oviposition and Duration of Life of a small Strain of the Rice Weevil, Calandra oryzae (L.), in Sierra Leone

Published online by Cambridge University Press:  10 July 2009

P. F. Prevett
P. F. Prevett
Affiliation:
Pest Infestation Laboratory, Slough.
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Extract

A study has been made of the rate of oviposition, on parboiled milled rice, of the small strain of the rice weevil, Calandra oryzae (L.), under normal laboratory conditions of temperature and relative humidity (means 27°C., 80% R.H.) in Sierra Leone, and of the utilisation of grains for oviposition.

On the average, a female laid 68 eggs in all, over an oviposition period of 71 days, the peak of egg-laying being reached during the third week. Only 13 per cent, of grains were utilised. Differences between the results obtained and those recorded by previous workers are discussed.

The mean length of life of male and female weevils was found to be 113 and 97 days, respectively.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 50 , Issue 4 , January 1960 , pp. 697 - 702
Copyright
Copyright © Cambridge University Press 1960

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