Djogbénou Luc auteur aut IRD Akogbéto M. auteur aut IRD Chandre Fabrice auteur aut IRD text journalArticle eng text/pdf born digital access Resistance to organophosphates and carbarnates was investigated in three samples of Culex pipiens quinquefasciatus Say. from Cotonou and Parakou in the Republic of Benin. Each population of larvae was selected with propoxur to eliminate susceptible individuals and more easily analyse resistant mosquitoes if the resistance allele is present in the field sample. The mass-selection showed that there are resistant mosquitoes in natural populations of C. p. quinquefasciatus in Benin and that nowadays they are still at a low frequency. The result of the PCR-based assay revealed the presence of the C119S mutation in all the C. p. quinquefasciatus mosquitoes that survived exposure to mass-selection. This mutation is the same than reported in a large range of insects, including Anopheles gambiae. Thus, the G119S mutation is spreading in natural populations of C. p. quinquefasciatus in Africa. Therefore, good mosquito control strategies and agricultural use of insecticides are critical, and should be carefully applied to limit the spread of this resistance gene. specialized Culex quinquefasciatus Insecticide resistance Natural populations Benin 052 107 3 272-274 2008 0001-706X https://www.documentation.ird.fr/hor/fdi:010044099 10.1016/j.actatropica.2008.06.004 0001-706X [F B010044099] https://www.documentation.ird.fr/hor/fdi:010044099 https://www.documentation.ird.fr/intranet/publi/2008/12/010044099.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-01-09 2017-08-23 fdi:010044099 fre