Bioticand abiotic factors have been reported to affect the larvicidal efficacy of Bacillus thuringiensis israelensis (Bti) and Bacillus sphaericus (Bs), although the extent to which they are affected has been poorly documented. This paper studies the effect of sunlight exposure on the efficacy of a new larvicide formulation based on both Bti and
Bacillusthuringiensis var. israelensis (Bti) formulations are commonly used agents for mosquito and black fly control worldwide 1,2.More than 200 tons of Bti were applied annually in global Themicrobial control agent Bacillus thuringiensis var. israelensis (Bti) has been successfully used worldwide to reduce abundances of biting Nematocera (Diptera), often with little direct impact on non-target organisms observed. However, the potential for additional indirect effects on other ecosystem properties, including on trophic linkages Cepasde Bacillus thuringiensis: kurstaki - para orugas de palomillas tenebrionis - para algunas familias de escarabajos israelensis - para mosquitos y algunos dipteros más. Revista Argentina de Microbiología (2008) 40: 124-140 Mrun.