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Evaluation of Synergistic Interaction between Bacillus sphaericus and a Neem-based Biopesticide on Bsph-Susceptible Culex Quinquefasciatus Say Larvae

Published online by Cambridge University Press:  19 September 2011

S. Poopathi ,
T. R. Mani ,
D. R. Rao  and
L. Kabilan
S. Poopathi
Affiliation:
Centre for Research in Medical Entomology (Indian Council of Medical Research), 4 Sarojini Street, Chinna Chokkikulam, Madurai 625002, Tamil Nadu, South India
T. R. Mani
Affiliation:
Centre for Research in Medical Entomology (Indian Council of Medical Research), 4 Sarojini Street, Chinna Chokkikulam, Madurai 625002, Tamil Nadu, South India
D. R. Rao
Affiliation:
Centre for Research in Medical Entomology (Indian Council of Medical Research), 4 Sarojini Street, Chinna Chokkikulam, Madurai 625002, Tamil Nadu, South India
L. Kabilan
Affiliation:
Centre for Research in Medical Entomology (Indian Council of Medical Research), 4 Sarojini Street, Chinna Chokkikulam, Madurai 625002, Tamil Nadu, South India
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Abstract

—Bioassays were conducted with Bacillus sphaericus (Neide) 1593M (Bsph) and a neem based biopesticide formulation, Neemtox® (0.03% azadirachtin), independently and in different combinations, to evaluate any synergistic effects on Culex quinquefasciatus Say (Diptera: Culicidae) larvae susceptible to Bsph. The results indicated that the two biopesticides have no synergistic interaction on the larvae. These results are discussed in light of earlier experiments with resistant C. quinquefasciatus, in which Bspfc-Neemtox synergism was seen.

Résumé

—Des bioessais ont été conduits séparément et selon différentes combinaisons, avec Bacillus sphaericus (Neide) 1593M (Bsph) et une formulation de biopesticide à base de neem., Neemtox® (0.03% azadirachtine), pour évaluer d'éventuels effets synergiques sur des larves de Culex quinquefasciatus Say (Diptera: Culicidae) sensibles au Bsph. Les résultats indiquent que les deux biopesticides n'ont pas d'action synergique sur les larves. On discute de ces résultats à la lumière d'expérimentations antérieures conduites sur des C. quinquefasciatus résistants pour lesquels un synergisme Bsph-Neemtox a été observe.

Keywords

Culex quinquefasciatusBacillus sphaericusazadirachtinsynergismCulex quinquefasciatusBacillus sphaericusazadirachtinesynergisme
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 22 , Issue 4 , December 2002 , pp. 303 - 306
Copyright
Copyright © ICIPE 2002

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