Journal of Environmental Biology

Efficacy of Bacillus thuringiensis var. Kurstaki in the  control of two mosquito species (Anopheles stephensi and Culex quinquefasciatus)

A. Senthil Kumar¹, M. Moorthi¹, N. Ramakrishnan¹, P. Dhanapakiam*², V.K. Ramasamy¹ and A. Raja Rajeswari¹

 

¹Post Graduate and Research Department of Zoology, Sri Vasavi College, Erode - 638 316, India

²Post Graduate and Research Department of Zoology, J.K.K.College of Arts and Science for Women, Komarapalayam - 638 183, India

(Received: June 23, 2007; Revised received: September 28, 2007; Accepted: November 11, 2007)

Abstract: Bioinsecticide Bacillus thuringiensis var. kurstaki (Btk) was used for controlling the mosquito species (Anopheles stephensi and Culex quinquefasciatus) which gave a significant (p<0.05) mortality in both species.  The higher concentration of Btk was highly effective compared to the control ones. The controlling effect was dose and time dependent.  Among the studied mosquitoes the C. quinquefasciatus (LC₅₀  0.154%) was more susceptible than A. stephensi (LC₅₀  0.372%) towards the bioinsecticide Btk.

Key words: Bacillus thuringiensis var. kurstaki (Btk), Mosquitoes, Anopheles stephensi, Culex quinquefasciatus

PDF of full length paper is available with author (* divya_vkr@rediffmail.com)

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