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近十年来,褐稻虱(Nilaparata lugens stal)繁殖极快,危害严重,影响水稻的生长发育。控制方法是使用杀虫剂。在国内防治褐稻虱的主要药剂为:六六六(即含6％丙体六六六可湿性粉剂)、甲(乙)六粉(即含3％丙体六六六+1.5％甲基对硫磷或1％乙基对硫磷)和马拉松等。近年来发现六六六和甲(乙)六粉防治效果下降,从测定结果看,褐稻虱对丙体六六六的抗性高达11.5倍,而对马拉松、对硫磷和杀螟松等有机磷杀虫剂的敏感度和敏感品系相比却无明显差异。
In the past decade, Nilaparvata lugens stal has extremely fast and serious damage, affecting the growth and development of rice. The control method is to use pesticides. The main agents in the prevention and control of brown planthopper in China are: BHC (ie 6% WP hexavalent WP), A (B) PM 6 powder (ie 3% hexamer B6 + 1.5% methyl Parathion or 1% ethyl parathion) and marathons. In recent years, it has been found that the control efficacy of BHC and A (B) VI powder is reduced. From the results of the measurement, the resistance of Bt against BPH is as high as 11.5 times, while that of malathion, parathion and fenitrothion There was no significant difference between the sensitivity of organophosphate insecticide and the susceptible strain.