Larvicidal efficacy of Catharanthus roseus Linn.(Family:Apocynaceae) leaf extract and bacterial insecticide Bacillus thuringiensis against Anopheles stephensi Liston.

=2.18.2.41. 2.76 and 3.22 g/L,respectively.No mortality was observed in the control.Conclusions:The petroleum ether extract of C.roseus extract and B.thuringiensis have potential to be used as ideal eco-friendly agents for the control of An.stephensi in vector control programs.The combined treatment with this plant crude extract and bacterial toxin has better larvicidal efficacy against An.stephensi.