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The potency and effect of phytotoxins within yellow split-pea (Pisum sativum) and adzuki bean (Vigna angularis) on survival and reproductive potential of Sitophilus oryzae (L.) (Coleoptera: Curculionidae)

Published online by Cambridge University Press:  10 July 2009

Graham J. Holloway
Graham J. Holloway
Affiliation:
Population Biology Laboratory, Department of Pure and Applied Zoology, University of Reading, Whiteknights, Reading, Berks., RG6 2AJ, UK
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Abstract

Sitophilus oryzae (L.) is a serious pest of stored cereal grains, but recently a few populations have been found able to feed and breed on certain legumes also. Legumes contain many toxic phytochemicals. A technique is described to generate data suitable for probit analysis, enabling a dose- response line to a toxic food to be constructed. The toxic effects of two legumes, yellow split-pea and adzuki bean, on adult survival and reproduction in three geographical strains of S. oryzae were examined. The strains were shown to vary in their abilities to tolerate legume phytotoxins, but there was no correlation between the abilities to survive on different legumes in the same strain. Yellow split-pea was shown to have residual effects on adult survival and reproduction, but performance was enhanced rather than impaired. It is suggested that improved performance results from induction of certain enzymes by substances within yellow split-pea. The use of legumes mixed with cereals as a control measure against S. oryzae is also discussed.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 76 , Issue 2 , June 1986 , pp. 287 - 295
Copyright
Copyright © Cambridge University Press 1986

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