The use of synthetic pesticides was careless and indiscriminate, and led to number of wellknown problems (US National Academy of Sciences, 1992 Bulletin). Eventually we need a movement towards a more environment-oriented, sustainable, health protecting, low toxic pesticides in an attempt to preserve and protect the environment and human health. It should be to the extent that it is a pro-poor alternative and economically vibrant rural pest control materials under IMM (NICD 1997). As a logical conclusion, this led to the test of Azt and Btk. Their notable successes as a feeding deterrent to a number of pests, especially mosquito population throughout the world, expectations developed on the use of these biopesticides (Schmutterer 1992 and Bhattacharia 1998). The Azt and Btk are readily available, highly economical, dependable bio-insecticides with least poison effect. Since the control of the vector Aedes aegypti is an essential for the "National Economy", present study on the control of Aedes aegypti first instar larvae which are distributed in the breeding season, was designed to provide data using Azt and Btk at the laboratory. By the analysis of such data (Tables, plates and graphs) it has been inferred that “all 3%, 6% and 10% concentrations of Azadirachtin from Azadirachta indica and Bacillus thuringiensis var. kurstaki control the first instar larvae of Aedes aegypti. The least concentration of these is absolutely enough to control the Chickungunya Mosquito”
