Effects of Bacillus thuringiensis H-14 on the life table characteristics of F1 generation of Culex pipiens quinquefasciatus

The 4th instar larvae of Culex pipiens quinquefasciatus were treated with B. thuringiensis H-14 solution at a concentration of 14 × 103/ml in the laboratory. The life table characteristics of the F1 generation of the mosquito were studied, In comparison, with the untreated control group, the net reproduction rate of the treated mosquitoes reduced by 16.49%, the fecundity of the females reduced by 335%, while the average duration of the life cycles increased by 9 days. It is thus speculated that population of the F2 generation would be diminished due to the effects of Bt H-14 on the previous generation.