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1993～1995年用点滴法对褐飞虱的抗药性进行监测，结果表明，久效磷、西维因和甲胺磷分别对南宁、玉林和永福褐飞虱种群的触杀毒力最强，马拉硫磷的触杀毒力最弱。在测试条件基本相同的情况下，将所测得的LD50与相对敏感毒力基线的数据进行比较，广西褐飞虱种群村六六六仍然敏感，对甲胺磷的敏感性下降，对马拉硫磷和久效磷的抗性指数为10．8～23．6，对氨基甲酸酯类为4．1～12．8，对澳氰菊酯为0．93～10．4。与1992年相比，南宁褐飞虱种群对氨基甲酸酯类杀虫剂的抗性水平明显提高，抗性指数由3．56～6．21提高到4．1～12．8。广西不同褐飞虱种群对杀虫剂的敏感性只有很小差异。
The antibiotic resistance of BPH was monitored by drip method from 1993 to 1995. The results showed that the concentrations of monocrotophos, civicidin and methamidophos were the strongest to the brown planthopper population of Nanning, Yulin and Yongfu, respectively, and that of malathion Touch the weakest virulence. Under the same test conditions, comparing the measured LD50 with the baseline data of relative sensitive virulence, the BPH population in the village of 666 was still sensitive and its sensitivity to methamidophos decreased. The resistance index to monocrotophos was 10.8-23.6, for carbamates 4.1-12.8, and for cypermethrin 0.93- 10.4. Compared with 1992, the resistance of the BPH population of Nanning to carbamate insecticides was significantly increased, and the resistance index increased from 3.56 to 6.21 to 4.1 to 12.8. The sensitivity of different BPH populations to pesticides in Guangxi is only slightly different.