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近年来,褐稻虱已成为水稻的常发性害虫,以晚稻受害最重。受害的水稻,轻的谷粒不饱满,重的致使毁杆倒伏,严重减产。因此,掌握褐稻虱发生的规律,切实做好防治工作,是夺取晚稻高产的重要一环。一、发生规律。褐稻虱是一种迁飞性的害虫。6月上中旬在稻田里可见第一代成虫(也称迁入代),以后繁殖4～5个世代。1.田间消长与分布。
In recent years, brown planthopper has become a perennial insect pests to late rice damage most. Injured rice, light grain is not full, heavy caused by the destruction of bar lodging, a serious cut. Therefore, grasping the law of brown planthopper occurrence and effectively preventing and controlling it is an important part of winning high yield of late rice. First, the law occurs. Brown planthopper is a migratory pest. The first generation of adults can be seen in the middle of June in the paddy field (also known as moving into the generation), after breeding 4 to 5 generations. 1 field growth and distribution.