七、根据水稻旱种受病虫危害较重的特点,要狠抓对病虫害的防治实行水稻旱种后,水稻生态环境有很大改变,一些病、虫及鸟、鼠对水稻为害加重.由于水稻旱种多数选择低洼易涝地块,地下害虫发生较为严重.轻者使1～2成幼苗受害.重者达3～5成,甚至7～8成.水稻旱种实行早播种,灌水较晚,易遭麻雀和鼠类为害. 播种质量不好.覆土不 Seven, according to the characteristics of rice dry farming affected by pests and diseases heavier, pay close attention to the prevention and control of pests and diseases After the implementation of dry cultivation of rice, rice ecological environment has changed a lot, some diseases, insects and birds, rats harm to rice aggravate. The majority of rice dry seasons choose low-lying waterlogging plots, underground pests occurred more serious, the light so that 1 to 2 percent of the seedlings victims, such as heavy up to 3 to 5 percent, or even 7 to 8 percent. Late, susceptible to sparrows and rodents. Poor sowing quality