Abstract
Bacillus thuringiensis and Bacillus sphaericus have been widely used for the control of vector mosquitoes. However, the moderate efficacy has limited their use as mosquito larvicides. Mosquitocidal crystal protein and cytolysis toxin of Bacillus thuringiensis and binary toxin and mosquitoeidal toxin of Bacillus sphaeri-cus have been studied. Recently, recombinant DNA techniques have been used for improving insecticide effica-cy by enabling new endotoxin combinations to be produced within single strain from different bacteria. The a-vailability of these methods offers the potential for more effective control of mosquito vectors of malaria. Key words: Bacillus thuringiensis; Bacillas sphaericus; Cytolytic toxin; Crystal protein; B. sphaericus binary toxin ; Mosquitocidal toxin ; Recombinant bacterial larvicide
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