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作者在河北省定州市600hm~2棉田设立了棉铃虫抗药性治理示范区,采取以降低农药的选择压和利用敏感个体的稀释作用为出发点的一系列措施,实施了抗性治理。为评价治理效果,1991～1995年连续监测了河北省3个地区棉铃虫对氰戊菊酯、溴氰菊酯、氯氰菊酯和三氟氯氰菊酯的抗药性水平。结果表明,在非治理区,固安县种群的抗性指数(RR)由1991年的9.8～15.5倍,上升到1995年的26.1～85.3倍;故城县种群由31.1～57.7倍,上升到90.7～155.4倍;而抗性治理区定州市种群的抗性发展却较缓慢,稳定保持在18.0～25.0倍之间的中抗水平,证明抗性发展得到了有效控制。与非抗性治理区比较,定州棉田棉铃虫的虫口数下降4～8倍、防治费用降低23.7％～50％、纯收入增加约40％,说明抗性综合治理获得了初步的成功。
The authors established a demonstration zone of resistance to H. armigera in 600hm ~ 2 cotton fields in Dingzhou City, Hebei Province and implemented a series of measures to reduce the selection pressure of pesticides and the dilution effect of sensitive individuals. In order to evaluate the control effect, the drug resistance levels of fenvalerate, deltamethrin, cypermethrin and cyhalothrin in three areas of Hebei Province were continuously monitored from 1991 to 1995. The results showed that the resistance index (RR) of Gu’an County population increased from 9.8 to 15.5 times in 1991 to 26.1 to 85.3 times in 1995 in Guantan County and from 31.1 to 57.7 times in Gu’an County to 90.7 ~ 155.4-fold. However, the resistance development of Dingzhou population in the resistance-controlled area was relatively slow and remained stable at a level of 18.0-25.0 times, which proved that the development of resistance was effectively controlled. Compared with the non-resistant control area, the number of cotton bollworms in Dingzhou cotton field decreased by 4 ~ 8 times, the control cost decreased by 23.7% ~ 50% and the net income increased by 40%, indicating that the comprehensive management of resistance was initially successful.