Fitness Cost in Laboratory Selected Strain of the Potential Mosquito Vector of West Nile Virus (Culex pipiens) Associated with Resistance to the Insecticide Temephos
Journal Title: The Journal of Middle East and North Africa Sciences - Year 2017, Vol 3, Issue 5
Abstract
The fitness cost associated with resistance genes was investigated on mosquito’s viability. We studied four fitness parameters in a laboratory-selected strain of Culex pipiens associated with resistance to the insecticide temephos. S-Lab was the susceptible strain used for comparison. Two genes are involved in resistance to organophosphate (OP) insecticides: Ace-1 and Ester. After 5 generations of pressure, the temephos resistance ratio increased to 60.51 at RR95, exhibited a deficiency in the following two parameters: female fecundity (χ2=infini; dl=1; P<<0.05) and mortality rate (P<<0.05). Characterizations of resistance mechanisms indicate that resistance Ace-1 alleles coding for a modified acetylcholinesterase were associated with a higher mortality rate and lower fecundity. Several previous studies were used to compare and discuss our results.
Authors and Affiliations
Ahmed Tabbabi, Hassen Ben Cheikh
Keywords
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