%0 Journal Article %A JIANG Bin %A LI Shi-Gen %A QUAN Xin %A XUE Qing-Jie %A TAN Wen-Bin %A LIU Yong-Chun %A WANG Xin-Guo %A WANG Huai-Wei %T Experimental study on cross-resistance of Culex pipiens pallens to 3 kinds of chemical pesticides %D 2014 %R %J Chinese Journal of Schistosomiasis Control %P 531- %V 26 %N 5 %X Objective Objective To understand the cross?resistance of Culex pipiens pallens to common pesticides,so as to provide the evidence for improving the application of chemical pesticides. Methods Methods The IV instar larvae of DDVP?resistant,propoxur? resistant and cypermethrin?resistant strains as well as the sensitive strain of Culex pipiens pallens were collected to detect the re? sistance to DDVP,propoxur and cypermethrin based on the WHO bioassay method. Results Results The resistance coefficients of DDVP? resistant strain to DDVP,propoxur and cypermethrin were 14.47,8.96 and 207.27 respectively. The resistance coeffi? cients of propoxur?resistant strain to DDVP,propoxur and cypermethrin were 3.27,6.93 and 8.65 respectively. The resistance coefficients of cypermethrin?resistant strain to DDVP,propoxur and cypermethrin were 2.93,1.61 and 501.11 respectively. Con Con? ? clusion clusion The resistance and cross?resistance could be generated during the long?term application of a single kind of chemical pesticide,and we should pay more attention to the varieties and dosages of them. %U https://www.zgxfzz.com/EN/abstract/article_10020.shtml