分析了黔阳县１９８０年以来不同类型水稻白背飞虱虫源性质及与本田发生危害的关系．迁入量大和迁入峰次多是当代大发生的关键因素．早、晚稻本田各出现３次若虫盛发高峰．中稻区稻田随海拔升高，飞虱若虫峰次减少；海拔９００ｍ以上稻田一般只出现１次若虫高峰．雌成虫密度低，则繁殖率高，反之则低．不同水稻品种对飞虱抗性差异明显． The relationship between insect pests and Hokkaido insect pests of different types of rice in Qianyang County since 1980 was analyzed. Large amount of immigrants moved into the peak times and more are the key to the occurrence of contemporary. Early and late rice Honda appear 3 times the peak of nymphs. Mid-rice paddy fields increased with altitude, the nymphs of planthoppers decreased; more than 900m above sea level generally only appeared once in nymphs. Female adult density is low, then the high rate of reproduction, otherwise low. The resistance of different rice varieties to planthopper was significantly different.