JOURNAL OF ANIMAL AND VETERINARY ADVANCES, vol.8, no.7, pp.1326-1331, 2009 (SCI-Expanded)
The effects of sublethal concentrations of B.t.i. (Vectobac 12 AS, LC(50) = 0.15 and LC(70) = 0.76 mL m(-2)) on life parameters of Anopheles superpictus were assessed in the laboratory for 3 generations. According to the data, sex ratios were affected by exposure to sublethal doses of B.t.i. Developmental time was prolonged significantly in groups treated with LC(70) while, LC(20) had no effect. Pre-oviposition periods were not affected by sublethal concentrations. Oviposition period in the LC(70) group was prolonged, whereas, in the control and LC(20) groups it was nearly identical. Longevity was affected by sublethal exposure and increased from F(1)-F(3) in both groups. Gross and. net reproductive rates were adversely affected in both exposure groups and these effects increased with increasing B.t.i. concentration. Generation time was affected by exposure to sublethal concentrations and decreased from generation to generation. Main daily fecundity did not differ significantly between treatment groups and the control group but was slightly higher in the latter. Significant differences (p<0.05) between generations in terms of survival rate were found in the LC(20) group but not in the LC(70) group. Life parameters were affected adversely and this effect was more pronounced in lines exposed to higher concentrations. Lower concentration effects were not clear and parameters fluctuated between generations when compared to the control group.