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目的 :开展氯菊酯对德国小蠊的抗性调查、交互抗性、抗性消退和增效研究 ;方法 :果酱瓶药膜法 ;结果 :8个调查点的 3年抗性调查的抗性倍数为 0 5 4～ 7 93 ,德国小蠊经氯菊酯培育后 ,抗性倍数由 3 40增长到8 0 2倍需 2年半 ,对溴氰菊酯、氯氰菊酯和残杀威的交互抗性倍数分别为 2 40～ 4 14、1 83～ 4 78和 1 16～1 69,抗性品系不接触杀虫剂 ,培育至第 4代 ,抗性消失了 3 7 2 2 % ,至第 8代可消失 69 74% ,至第 10代可消失85 79% ,氯菊酯加入S2 和S1后 ,对抗性品系增效倍数分别为 1 2 2～ 1 48和 1 45～ 1 96,48h死亡率均为10 0 % ;结论 :部分调查点已产生抗性 ,抗氯菊酯品系对溴氰菊酯、氯氰菊酯已产生交互抗性 ,对残杀威未产生交互抗性 ,由中抗性转变为低抗性至基本消失 ,需要 3年 ,增效剂能提高氯菊酯灭蟑螂的效果 ,且对氯菊酯的增效作用S1比S2 强
OBJECTIVE: To carry out the investigation on the resistance of Permethrin to German cockroach, interactive resistance, resistance regression and synergism. Methods: The membrane method of jelly bottle; Results: Resistance to 3-year resistance survey at 8 investigation points Fold increase from 0 54 to 7 93. After the control of Blattella germanica by permethrin, the resistance ratio increased from 3 40 to 8 0 2 times for 2 and a half years. The cross resistance to deltamethrin, cypermethrin and propoxurin The multiplicities were 240-414,1 83-478 and 116-169, respectively. The resistant lines were not exposed to insecticides and were passaged to the fourth generation, with 37.22% of the resistance disappearing to the eighth generation 69 74% disappeared and 85 79% disappeared in the tenth generation. The efficiency multiplication rates of the permethrin-resistant strains after adding permethrin to S2 and S1 were respectively 122 to 148 and from 1 45 to 1 96 to 48 h Was 10 0%. Conclusion: Some of the surveyed sites had developed resistance. Permethrin strains had interactive resistance to deltamethrin and cypermethrin, and had no cross-resistance to methiocarb, from middle resistance to low resistance Sex to the basic disappear, it takes 3 years, synergist can improve the effect of permethrin cockroach, and the synergistic effect of permethrin S1 than S2