随着科学种田水平的提高,水肥条件的改善,优良品种的推广,特别是杂交水稻的普及,病虫鼠草害的发生和为害逐年加重,出现了许多新的特点,如常规性害虫加剧,病害加重,鼠害猖獗,稗草回升,次要害虫上升,新的病害出现。这些情况给粮食生产带来极大损失,全县每年损失1.5～1.8千万 With the improvement of the level of scientific farming, the improvement of water and fertilizer conditions, the promotion of fine varieties, especially the popularization of hybrid rice, the occurrence of pests and diseases and pests of pests and diseases are increasing year by year, many new features have emerged, such as the aggravation of conventional pests, Diseases are aggravating, rodent pests are rampant, barnyardgrass is up, secondary pests are up and new diseases appear. These conditions have brought great losses to grain production, and the county has lost 1.5 to 1.8 million yuan each year