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Toxicity of Three Chemical Insecticides in Combination with Bacillus spp. Against Mosquito Larvae

Published online by Cambridge University Press:  19 September 2011

N. L. Kelada  and
Nader Shaker
N. L. Kelada
Affiliation:
Plant Protection Department, Faculty of Agriculture, University of Alexandria, Alexandria, Egypt
Nader Shaker
Affiliation:
Plant Protection Department, Faculty of Agriculture, University of Alexandria, Alexandria, Egypt
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Abstract

The toxicity of dursban, reldan and abate were tested against the larvae of Culex pipiens L. and Aedes aegypti (L.), in addition to evaluating effect of two bacterial toxins (Bacillus thuringiensis H-14, and B. sphaericus 1593) against C. pipiens larvae.

The synergistic effects of bacterial toxin-insecticide combinations were calculated and the new LCp-lines were determined by using a sublethal toxin dose of B. thuringiensis and B. sphaericus in combination with the three tested insecticides against Culex pipiens larvae, which was the most tolerant mosquito species.

Bacterial toxins potentiated the three used insecticides at different levels of potentiation, depending on the chemical structure of the insecticide used.

Résumé

L'effect toxique du dursban, reldan et d'abate été testés vis les larvas de Culex pipiens L. et de Aedes aegypti (L.). Aussi l'effect de deux toxines bacteriéne (Bacillus thuringiensis H. 14 et B. sphaericus 1593) a été evalués yis les larves de Culex pipiens L.

L'effect additive des combinaison toxin-insecticide a été colculeés ainsi-que les courbes de LCp ont été dessinées, en utilisant les doses sous-mortel des toxines de B. thuringiensis et de B. sphaericus en combinaison vec les trois insecticides testés vis á vis larvaes de Culex pipiens la souche le plus tolerant.

Les toxines bacteriéne renforce les trois insecticides utilisées sur tout les niveaux de potentialité dependant de la structure chemique des insecticides.

Keywords

Culex pipiensAedes aegyptiBacillus thuringiensisB. sphaericusdursbanreldanabatemosquito larvae
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 9 , Issue 2 , April 1988 , pp. 229 - 231
Copyright
Copyright © ICIPE 1988

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References

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