FIELD-EVALUATION OF VECTOBAC-G, VECTOBAC-12AS AND BACTIMOS WP AGAINSTTHE DENGUE VECTOR AEDES-ALBOPICTUS IN TIRES

The efficacy of three formulations of Bacillus thuringiensis var. isra elensis was studied against Aedes albopictus in discarded tires. The f ormulations were: Vectobac G (corn cob formulation), Vectobac 12AS (aq ueous suspension), and Bactimos WP (wettable powder formulation). Both Vectobac G and Vectobac 12AS were effective for 24 hr with more than 80% mortality. Both Vectobac formulations were significantly more effe ctive than Bactimos WP for 24 kr alter treatment (P<0.0005). A week af ter treatment, Vectobac 12AS was significantly different than Bactimos WP (P<0.05). However, Vectobac G did not differ significantly from Ba ctimos WP (P>0.05); two weeks after spraying there was no significant difference among the various formulations (P>0.05).