The call for malaria control has increased over the last century. Malaria is an infectious
disease caused by Plasmodium. The emergence of insecticides resistant strains has
therefore necessitated the need to develop alternative control methods. The objective of this
study was to evaluate the inhibitory activities of Bacillus thurigensis. Bacillus subtilis and
Pseudomonas aeruginosa against Aedes aegypti and Anopheles gamblae larvae. The
bacterial strains were obt0ained from streak culture and subcultured before their insecticides
activities were tested. All the bacterial strains were identified as mosquito – toxic after the
selective bioassays and the LC50recorded for each bacterial strains. These results indicate
that the bacteria are effective against mosquito larvae, so they could be used as an
alternative bioinsecticides against mosquitoes.