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将敏感棉蚜用灭多威选育２０代，获得抗性倍数达１４２．３７的高抗种群，在连续数代不接触药剂的情况下，其抗性水平呈下降趋势，停药１２代后抗性基本稳定，但高于敏感种群５倍，以该种群进行恢复试验，其抗性发展速度更快，恢复８代时抗性出现突增，２０代时抗性倍数达３８３．６７。
The susceptible cotton aphid was bred 20 times with methomyl to obtain a high resistant population with a resistance multiple of 142.37. The resistance level of the susceptible cotton aphid declined after 12 generations The resistance was basically stable but higher than that of the susceptible population by 5-fold. The resistance test of the population was more rapid and the resistance increased sharply at the 8th passage, with the resistance multiplying by 383.67 at the 20th generation.