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International Journal of Tropical Insect Science

, Volume 7, Issue 6, pp 697–699 | Cite as

Controlled-Release Malathion Formulations as Mosquito Larvicides

  • Moustafa S. Saleh
Research Article

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.

Key Words

Polyvinyl chloride (PVC) controlled-release malathion Culex pipiens mosquito larvae mosquito adults reproductive potential longevity 

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 l’ingrediant 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 longévité des moustiques adultes qui ont survécu a ce traitement.

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Copyright information

© ICIPE 1986

Authors and Affiliations

  • Moustafa S. Saleh
    • 1
  1. 1.Entomology Division, Faculty of AgricultureUniversity of AlexandriaAlexandriaEgypt

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