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Toxicity of Palm Oil to Eggs and Larvae of Callosobruchus maculatus (F.) on Stored Cowpea

Published online by Cambridge University Press:  19 September 2011

E. A. Osekre ,
W. S. K. Gbewonyo  and
J. N. Ayertey
E. A. Osekre
Affiliation:
Plant Genetic Resources Centre, P. O. Box 7, Bunso, Ghana
W. S. K. Gbewonyo
Affiliation:
Department of Biochemistry, University of Ghana, Legon, Ghana
J. N. Ayertey
Affiliation:
Department of Crop Science, University of Ghana, Legon, Ghana E-mail: [email protected]
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Abstract

A commercially produced palm oil brand, Palmin oil, was evaluated for its effect on eggs and larvae of Callosobruchus maculatus (F.) (Coleoptera: Bruchidae) on cowpea (Vigna unguiculata) (L.) Walp. Application of 1 μ1 of the oil on eggs deposited on 10 cowpea seeds, or directly on larvae growing inside seeds resulted in their death. Embryo mortality occurred only when the oil was placed at the anterior end of the egg. The nutritive content of cowpea seeds treated with Palmin oil remained unchanged. Furthermore, the oil did not go rancid following six months of storage.

Résumé

L'huile Palmin, une huile de palme produite pour la commercialisation, a été évaluée pour ses effets sur les oeufs et les larves de Callosobruchus maculatus (F.) (Coleoptera: Bruchidae) sur des graines de niébé, Vigna unguiculata (L.) Walp. Lorsque Ton applique 1 ul d'huile sur des oeufs deposes sur 10 graines de niébé, ou directement sur les larves se développant à l'intérieur des graines, cela provoque leur mort. On observe la mortalité embryonnaire uniquement lorsque l'huile est appliquée sur l'extrémité antérieure de l'oeuf. La qualité nutritive des graines de niébé traitées à l'huile Palmin reste inchangée. En outre l'huile ne rancit pas après 6 mois de conservation.

Keywords

Callosobruchus maculatuscowpeastoragenutritional statuspalm oilCallosobruchus maculatusniébéstockageétat nutritionnelhuile de palme
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 22 , Issue 3 , September 2002 , pp. 221 - 224
Copyright
Copyright © ICIPE 2002

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References

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