我县危害水稻的飞虱种类主要是白背飞虱和褐稻虱两种。从危害来看,早晚稻穗期受害严重,早稻以白背飞虱为主,晚稻以褐稻虱为主。两种飞虱的主要虫源是外地迁入。但白背飞虱个别年份在四月中旬早稻秧田可以发现怀卵成虫,冬季气温较高的年份,当地有部份成虫越冬,大量虫源仍然是迁入为主。 Our county endangered rice planthopper species are mainly whitebacked planthopper and brown planthopper two kinds. From the hazard point of view, sooner or later the ear suffered serious damage in the ear, early rice to white-backed planthopper-based, late rice to brown planthopper-based. The main source of the two planthoppers is the immigration. However, individual white -backed planthoppers in early April in mid-April can be found oviparous adult eggs, winter temperatures higher year, some of the local adults wintering, a large number of insects are still moving into the main.