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The Effect of Crop Microenvironment on the Pea Leaf Weevil's Behaviour: An Explanation for Weevil Departure from Diverse Cropping Systems

Published online by Cambridge University Press:  19 September 2011

C. W. Baliddawa
C. W. Baliddawa
Affiliation:
Department of Crop Science, Makerere University, P.O. Box 7062, Kampala, Uganda
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Abstract

A study of the effect of microenvironment on the pea leaf weevil's behaviour was made comparing a broad bean monoculture with a broad bean-oat crop mixture. It is observed that more weevils depart from the crop mixtures than from the monocultures. Microenvironment study in the two cropping systems show that temperature and wind speed are not significantly altered in the crop mixtures as compared to the monoculture, but beans growing in the mixtures were significantly more shaded than those in the monoculture. Evidence is given to show that this relative shading could be the main factor responsible for the observed increased weevil departure from the crop mixtures.

Résumé

Etude sur l'éffet du microenvironment sur le compartement des insectes qui attaquent les familles des petit-pois a été faite en comparant une prosse fève monoculture avec un melange des haricotovoire. Il a été observé que le depart de la plus-part de ces insectes quitent le melange des plantes que les plantes monocultures: L'étude du milieu dans les deux système de plantation montre que la temperature, la vitesse du vent ne sont pas modifier d'une manière significative dans le melange des plantes que dans le monoculture, mais les haricots qui granissent en melange sont plus dans l'ombre que celle en monoculture. La preuve montre que cette ombrage peut-être un facteur essentiel responsable pour l'augmentation du départ des insectes du melange des plantes.

Keywords

Microenvironmentdeparturediverse cropping systempea leaf weevilmonoculture
Type
Research Article
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 4 , August 1988 , pp. 509 - 514
Copyright
Copyright © ICIPE 1988

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References

REFERENCES

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