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Larvicidal activity of a granular formulation of a Melia volkensii (Gurke) acetone extract against Aedes aegypti L.

Published online by Cambridge University Press:  19 September 2011

Peter Awala ,
Richard W. Mwangi  and
Lucy W. Irungu
Peter Awala
Affiliation:
Department of Zoology, University of Nairobi, P. O. Box 30197, Nairobi, Kenya
Richard W. Mwangi
Affiliation:
Department of Zoology, University of Nairobi, P. O. Box 30197, Nairobi, Kenya
Lucy W. Irungu*
Affiliation:
Department of Zoology, University of Nairobi, P. O. Box 30197, Nairobi, Kenya
*
E-mail: [email protected]
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Abstract

A method of formulating granules from an acetone extract fraction of the fruit of Melia volkensii, a Kenyan tree known to possess insecticidal properties, was developed. The granules were tested for toxicity to third and fourth instars of Aedes aegypti L. Some acute physiological effects were observed within 24 hours of adding the granules to water as larval food. A mortality of 95% was achieved on various developmental stages of the mosquito after 12 days, with only 5% adult emergence being recorded.

Résumé

Une méthode de formulation de granules a été mise au point à partir d'une fraction d'un extrait à l'acétone du fruit de Melia volkensii (Gurke), un arbre kenyan reconnu posséder des propriétés insecticides. Les granules étaient testées pour leur toxicité sur les 3me et 4me stades larvaires de A. aegypti. Certains effets physiologiques aigus ont été dépistés endéans 24 h après que ces granules étaient ajoutées à l'eau, en guise d'aliment pour larves. Une mortalité de 95% a été enregistrée chez différents états de développement du moustique au cours de 12 jours et seulement 5% d'adultes ont émergés.

Keywords

Aedcs aegyplilarvicidal activityMelia volkensiiAedes aegyptieffet larvicideMelia volkensii
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 18 , Issue 3 , September 1998 , pp. 225 - 228
Copyright
Copyright © ICIPE 1998

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