Ben Jha Ibtissem
Tunisia
Research Article
Susceptibility of Larval Stage of Mosquito Culex pipiens against Chlorpyrifos Insecticide in Southern Tunisia
Author(s): Jaber Daaboub, Ahmed Tabbabi, Raja Ben Cheikh, Ali Lamari, Ben Jha Ibtissem and Hassen Ben Cheikh
Jaber Daaboub, Ahmed Tabbabi, Raja Ben Cheikh, Ali Lamari, Ben Jha Ibtissem and Hassen Ben Cheikh
Three populations of mosquito Culex pipiens were used to study the susceptibility of larval stage against organophosphate chlorpyrifos and carbamate propoxur insecticides in Southern Tunisia. All samples were resistant to chlorpyrifos (RR>1, p<0.05) and the tolerance to this insecticide was varied between 1.8 and 1318. The sample # 3 was the most susceptible and disclosed a little difference when compared to S-Lab (RR50=1.9). The highest resistance levels (>1,000-fold) was recorded in samples # 2 (South East). The level of resistance was lower, not exceeding 2-fold in samples # 3 (Far South). Total esterase activity of field populations detected one or several esterases in all the studied samples, with the exception of the sample # 3 despite the addition of DEF showed that the increased detoxification by EST and/or GST was not responsible for chlorpyrifos resistance in these .. View More»
DOI:
10.4172/2161-1041.1000182