水稻机割大大提高劳动生产率 ,降低农民劳动强度 ,但也带来不良后果 ,由于机割大多遗留稻桩较高 ,稻草还田末经处理 ,给多种水稻病虫害创造了良好的传播和越冬条件。为摸清晚稻机割对水稻二化螟越冬的影响 ,我们于 1999年 12月至 2 0 0 0年 4月在诸暨市农科所和诸暨市牌头镇两 Rice cutting greatly enhances labor productivity and reduces labor intensity of peasants, but also brings undesirable consequences. Since the majority of mowing rice leaves are left behind and rice is treated at the end of the field, good propagation and overwintering conditions have been created for various rice pests and diseases . In order to find out the effects of late rice cutting on the overwintering of rice stem borer, we conducted a series of experiments between Zhuji Agronomy Station and Paotou Town, Zhuji City from December 1999 to April 2000