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在70％的高选择压下,分别用溴氰菊酯、三氟氯氰菊酯和凯明2号(50％辛硫磷·甲基对硫磷·三氟氯氰乳油,即含三氟氯氰菊酯的复配药剂)对室内饲养了12代未经农药处理的棉铃虫Helicoverpa armigera(H(?)bner)敏感品系进行了抗性筛选。结果,经连续筛选至第12代的LD_(50)值与筛选前第1代的LD_(50)值比较,抗溴氰菊酯种群对溴氰菊酯的抗性为136.7倍,属高抗水平;抗三氟氯氰菊酯种群对三氟氯氰菊酯的抗性为9.5倍,抗凯明2号种群对凯明2号的抗性为3.4倍,均属低抗水平。用8种常用杀虫剂分别对这3个种群在停止上述杀虫剂筛选2代后进行了交互抗性分析。结果表明,3个种群平均对8种杀虫剂的抗性倍数中,对溴氰菊酯、氰戊菊酯、灭多威的抗性极显著高于其余5种杀虫剂;3个种群的平均抗性倍数之间差异极显著,顺序依次为抗溴氰菊酯种群>抗三氟氯氰菊酯种群>抗凯明2号种群;以平均抗性倍数表示的抗性种群与杀虫剂的交互作用有以下几个结果:①高抗溴氰菊酯的种群对氰戊菊酯和灭多威有极显著的交互抗性,但对三氟氯氰菊酯和凯明2号仍反应敏感。②抗三氟氯氰菊酯和抗凯明2号的2个种群对溴氰菊酯有极显著的交互抗性;抗三氟氯氰菊酯种群对灭多威和氰戊菊酯有一定抗性,抗凯明2号种群对硫丹有一定抗性。
At 70% of the high selective pressure, deltamethrin, cyhalothrin and cleming 2 (50% phoxim methyl parathion-cyfluthrin, ie, The agent was used to screen 12 susceptible strains of Helicoverpa armigera (H (?) Bner) that had not been treated in the laboratory. As a result, the deltamethrin population resistance to deltamethrin was 136.7 times higher than that of the LD 50 value of the 12th generation continuous screening to that of the first generation before screening, which was highly resistant Level. The resistance of cyhalothrin to beta-cypermethrin was 9.5-fold. The resistance of Kai-Ming 2 to Kai-Ming-2 was 3.4-fold, which were all low anti-level. The cross resistance analysis of these 3 populations after the above two insecticides were screened for 2 generations respectively was carried out with 8 commonly used insecticides. The results showed that resistance to deltamethrin, fenvalerate and methomyl was significantly higher than that of the other five insecticides in the average of the resistance to eight insecticides among the three populations. Three populations The results showed that there was significant difference between the average resistance fold and the order of resistance to deltamethrin population> anti-cyhalothrin population> anti-Cymene 2 population; interaction of resistant populations with pesticides as indicated by the average multiple of resistance The results were as follows: (1) The population of high deltamethrin had very significant cross resistance to fenvalerate and methomyl, but was still sensitive to cyhalothrin and cleming 2. ② The two populations of anti-cyhalothrin and anti-Cymene 2 had a very significant interactive resistance to deltamethrin; the anti-cyhalothrin population had some resistance to methomyl and fenvalerate, Population No. 2 has some resistance to endosulfan.