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Controlled-release malathion formulations as mosquito larvicides

Published online by Cambridge University Press:  19 September 2011

Moustafa S. Saleh
Moustafa S. Saleh
Affiliation:
Entomology Division, Faculty of Agriculture, University of Alexandria, Alexandria, Egypt
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Abstract

Three polyvinyl chloride (PVC) formulations of malathion were prepared and tested as controlled-release formulations against mosquito larvae of Culex pipiens L. Non-expanded formulations gave effective control, with 100% larval mortalities, for 23–51 days, followed by expanded (16–33 days) and foamed (14–27 days) formulations. The results indicate that increasing the percentage of active ingredient in the present formulations increased their effective control against mosquito larvae for longer periods.

Larval treatments with these formulations of malathion led apart from lethal action to a decrease in the reproductive potential and in longevity of mosquito adults which survived from these treatments.

Résumé

Trois polyvinyl chloride (PVC) formulations de malathion ont été préparées et expérimentées comme formulations a débit contrôlé contre les larves du moustique Culex pipiens L. Les résultats ont montré que les formulations non dilatées ont donné un contrôlé efficace avec 100% de mortalité des larves pour 23–51 jours, suivi par des formulations dilatées (16–33 jours) et des formulations gonflées (14–27 jours). Les résultats ont aussi indiqué l'augmentation du pourcentage de lingrediant actif dans les présentes formulations a sugmenté leur contrôlé efficace sur les larves des moustiques pour de plus longues periodes.

Hormis leur action mortelle, le traitement des larves avec ces formulations de malathion, a aboutit à un effet décroissant sur le potentiel de reproduction, ainsi que sur la longevité des moustiques adultes qui ont survécu a ce traitement.

Keywords

Polyvinyl chloride (PVC)controlled-releasemalathionCulex pipiensmosquito larvaemosquito adultsreproductive potentiallongevity
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 7 , Issue 6 , December 1986 , pp. 697 - 699
Copyright
Copyright © ICIPE 1986

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References

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