Drug Resistance Evolution of Dichlorvos-Resistant and Cypermethrin-Resistant Strains of Culex pipiens pallens
	    		
		   		
	    	
    	
    	
   		
        
        	
        		- VernacularTitle:淡色库蚊抗敌敌畏和抗氯氰菊酯品系的抗性演变
 
        	
        	
        	
        		- Author:
	        		
		        		
		        		
			        		Shigen LI
			        		
			        		
		        		
		        		
		        		
		        		
		        		
			        		
			        		
		        		
	        		
        		 
        	
        	
        	
        		- Publication Type:Journal Article
 
        	
        	
        		- Keywords:
        			
	        			
	        				
	        				
			        		
				        		Culex pipiens pallens;
			        		
			        		
			        		
				        		Insecticide-resistance;
			        		
			        		
			        		
				        		Dichlorvos;
			        		
			        		
			        		
				        		Cypermethrin
			        		
			        		
	        			
        			
        		
 
        	
            
            
            	- From:
	            		
	            			Chinese Journal of Parasitology and Parasitic Diseases
	            		
	            		 1987;0(04):-
	            	
            	
 
            
            
            	- CountryChina
 
            
            
            	- Language:Chinese
 
            
            
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		        	Abstract:
			       	
			       		
				        
				        	Susceptible strain of Culex pipiens pallens was selected with dichlorvos and cypermethrin for 42 generations in the laboratory. At generation 42, the resistance level to dichlorvos and cypermethrin was 12.2-fold and 534.3- fold, respectively, in comparison to their parent generations. The dichlorvos-resistant and cypermethrin-resistant strains were then conventionally bred for another 20 generations, the resistance level to dichlorvos and cypermethrin decreased to 6.1- fold and 83.3-fold, respectively. The results indicated that the two resistant strains showed different development of resistance.