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采用高龄幼虫点滴法测定了水稻二化螟对杀虫单和三唑磷的抗性水平。结果表明 :二化螟种群对杀虫单达高抗水平 ,其LD50 为 2 .690 3 μg/头 ,抗性倍数达 463 .84倍 ,对三唑磷属低抗水平 ,其LD50 为 0 .0 3 99μg/头 ,抗性倍数为 3 .66倍。
The resistance to insecticides and triazophos of rice stem borer (Chilo suppressalis (Walker) The results showed that the population of Chilo suppressalis was highly resistant to insecticide and the LD50 was 2. 690 3 μg / head, with a resistance multiple of 463.84 times. The LD50 was low for triazophos. 0 3 99μg / head, the resistance multiple was 3.66 times.