晚稻后期死秆倒伏是影响高产的一个突出问题。我县太阳升公社1974年死秆2900亩,占晚稻面积的13.2%;公社农科所严重田块亩产200斤,比未受害田块减产350斤。一、产生原因产生的原因是复杂的,但我们认为主要是水肥营理不善、病虫危害的结果。(1)稻飞虱的严重危害:稻飞虱虫体小,繁殖 Late fall of late rice is an outstanding problem that affects high yield. Sun County commune commune 1974 dead 2900 acres, accounting for 13.2% of late rice area; commune agricultural field serious plots per mu 200 kilograms, less than unharmed plots yield 350 pounds. First, the causes of the causes are complex, but we believe that the main water and fertilizer mismanagement, the result of pests and diseases. (1) The serious harm of planthopper: The planthopper is small and reproduce