Microbial control of insect pest of crops using entomopathogens is pest management strategy. Bacillus thuringiensis has a great potential for this purpose. The focus of the present study was to determine the individual and combined effect of different insecticides such as Saraca indica as a botanical insecticide, B. thuringiensis and chemical insecticides against larvae and adults of T. castaneum. Results were analyzed by SPSS probit analysis, LC50 was noted for all these insecticides and results were compared with each other. According to the results from the individual insecticide B....