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本文报道近十多年来广东省褐稻虱Nilaparvatalugens（Stal）生物型变异动态监测的研究结果，针对当前褐稻虱优势生物型及发展趋势，推荐优良的抗褐稻虱品种资源。监测结果表明；根据苗期抗性反应，分蘖期生存率测定，田间系统调查监测，广州褐稻虱田间种群对带有Bphl抗性基因的代表品种IR26的致害力不断增强，1992年以来抗性反应达生物型2的水平。1992～1994年在全省7个不同生态类型地区取样测定及验证试验结果表明，生物型2已上升为广东褐稻虱田间主害代的优势种群。多年的抗性鉴定结果证实，外引品种IR56、IR50404同其对应亲本PTB33、Babawee一样，对褐稻虱的抗性稳定，已推荐用作进一步抗性育种的优良抗源。粳籼89等23个品种能抗褐稻虱生物型1和2，可及时替代带Bphl抗性基因的品种。
In this paper, we report the results of the dynamic monitoring of the biotype variation of Nilaparvatalugens (Stal) in brown planthopper of Guangdong Province in recent ten years. In view of the current dominant biotypes and development trend of brown planthopper, we recommend excellent varieties of brown planthopper resistant to brown planthopper. The monitoring results showed that the virulence of the population of the brown planthopper population of the population of the brown planthopper, BPH, with the Bphl resistance gene, IR26, was continually enhanced according to the resistance at seedling stage, the survival rate at tillering stage and field investigation. Since 1992, Sexual response up to biotype 2 levels. The results of sampling and validation tests in seven different ecotypes in the province from 1992 to 1994 showed that the biotype 2 had risen to the dominant population of the brown planthopper in Guangdong. The results of many years of resistance test confirmed that the introduced varieties IR56 and IR50404, like their corresponding parents PTB33 and Babawee, were stable against the brown planthopper, and have been recommended as excellent resistance sources for further resistance breeding. 23 varieties such as japonica indica 89 could resist the brown planthopper biotype 1 and 2, which could replace the varieties with Bphl resistance gene in time.