Investigation on resistance to common insecticides of blattella germanica in Lianyungang City

Objective To study and understand the resistance to common insecticides of blattella germanica in Lianyungang,and provide scientific basis for rational use of insecticides.Method Use the common drug contacting method of drug sensitive layers to determiner the resistance to cypermethrin,acephate and propoxur of blattella germanica.Results The resistance coefficients of blattella germanica to cypermethrin,acephate and propoxur were 38.2,6.0,1.8,and the resistance levels were high,moderate and low resistance,respectively.Conclusions Blattella germanica had different resistance to cypermethrin,acephate and propoxur.We should select appropriate insecticides to improve the control effect of cockroach according to their resistance to drugs.