关键词: 德国小蠊, 氯菊酯, 抗性, 抗性消退

Abstract: Objective To survey the resistance of the German cockroach and the resistant subsidence of permethrin-resistant German cockroach.Methods The method of contacting with chemical cover in jar was used in this paper.Results The resistant ratio in 8 investigated places was 0.59-7.93,which had been monitered the resistance to permethrin for 3 years.When permethrin-resistant German cockroach did not contact with the insecticide,the resistance decreased 37.22 percent until the 4th generation,and the resistance decreased 69.74 percent until the 8th,and 85.79 percent until the 10th.Conclusion The strains of investigated places in Fujian had resistance to permethrin and tended to rise.It needs about 3 years that the resistance of permethrin-resistant German cockroach subsides from middle degree to low degree,and basically to non-resistance.