Resistance development in mosquito larvae Culex pipiens to the bacterial agent Bacillus thuringiensis var. israelensis |
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| Authors: | M S Saleh F A El-Meniawi N L Kelada H M Zahran |
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| Institution: | Department of Economic Entomology, Faculty of Agriculture, University of Alexandria, Alexandria, Egypt |
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| Abstract: | Abstract: Mosquito larvae of Culex pipiens were subjected repeatedly to selection pressure with the bacterial agent Bacillus thuringiensis var. israelensis ( B.t.i .) in the laboratory. Only 2.78-fold increase in tolerance to B.t.i . was induced in C. pipiens as a result of 20 generations of selection. The tolerance of C. pipiens to B.t.i . decreased by about 58% after stopping the selection for three generations. Larval selection with B.t.i. caused a reduction in the reproductive potential of mosquito adult survivors but did not affect the adult longevity and the time of blood meal digestion ingested by female mosquitoes. |
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