近年矮杆高产品种迅速推广,施肥水平、种植密度不断提高,水稻纹枯病逐渐上升,成为水稻增产的主要矛盾之一。以前我院曾大量使用有机砷农药防治水稻纹枯病,取得了良好防治效果。但有机砷之类农药若使用不当就会产生药害,并对人畜有毒。特别水稻生长后期 In recent years, the rapid expansion of high-yielding varieties of short bars has been rapidly promoted. Fertilization levels, planting densities are continuously increasing, and sheath blight of rice is gradually rising, making it one of the major contradictions of rice yield increase. Previously, our hospital had extensive use of organic arsenic pesticides to control rice sheath blight, and achieved good control effect. However, pesticides such as organic arsenic can cause phytotoxicity if used improperly, and are toxic to humans and animals. Special late rice growth