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二化螟是浙江省水稻的主要害虫。由于连续使用杀虫双超过20 a，三唑磷10 a 防治二 化螟，致使二化螟对杀虫单(杀虫双)普遍产生抗药性。1999年测定抗性增加67～587倍，达 到高抗和极高抗水平；二化螟对三唑磷在温州和台州等局部地区也达到了68～162倍的高抗 水平。为治理二化螟抗药性，必须加强对害虫抗药性的监测，在高抗药性地区停止使用杀虫 单(杀虫双)和三唑磷防治二化螟；在低抗药性和敏感地区也应减少使用次数和用量，达到延 缓抗药性产生的目的。
Chilo suppressalis is a major pest of rice in Zhejiang Province. As the continuous use of insecticidal double over 20 a, triazophos 10 a control Chilo suppressalis, resulting in Chilo suppressalis insecticidal single (insecticidal double) universal resistance. The measured resistance increased by 67-587 times in 1999, reaching high resistance and very high resistance level. Triazophos also reached a high anti-level of 68-162 times in some areas such as Wenzhou and Taizhou. In order to control the resistance of rice stem borer, the resistance of pest insects should be monitored, and the use of insecticidal single (insecticidal double) and triazophos should be stopped in the areas with high resistance; the stem borer should also be used in areas with low resistance and susceptibility Reduce the use of the number and dosage to achieve the purpose of delaying the emergence of drug resistance.