褐稻虱[Nilaparvata lugens(sta°1)]是亚洲的重要水稻害虫。利用抗虫品种是防治该虫的经济而有效的措施。几年来我们对稻种抗褐飞虱的鉴定方法进行了研究和改进。现整理如下,以供参考。 (一)田间试验表明,若干水稻品种对褐稻虱具有中抗或抗的特性。但采用国际上的标准苗期集团筛选法,不能将以耐害性为主的中抗品种从感虫品种中区分出来。只有采用改良的筛选法,即当秧苗具有3.5—4.5片叶时(约 Nilaparvata lugens (sta ° 1) is an important rice pest in Asia. The use of insect-resistant varieties is a cost-effective and effective measure to control the insects. In recent years, we have studied and improved the identification of rice varieties against BPH. Now collated as follows for reference. (A) field experiments showed that a number of rice varieties have resistance or resistance to brown planthopper. However, using the international standard seedling group screening method, it is impossible to distinguish the resistant varieties from the susceptible varieties. Only the improved screening method is used, ie when the seedlings have 3.5-4.5 leaves (approx