福美砷的新用法福美砷是一种有机砷制剂，兼有保护和治疗作用，防治范围广，残效期较长，降雨量不太大的情况下，药效期可达２０天以上。该药从６０年代末被大面积推广应用以来，疗效一直很稳定。３月中旬喷其１００倍液，对果树病害特别是对腐烂病的防治，具有良好效果。... Fumei new use of arsenic Fumei arsenic is an organic arsenic preparation, both protective and therapeutic effect of a wide range of prevention and treatment, long residual period, rainfall is not too large, the validity period of up to 20 days. The drug has been widely used since the late 1960s, the efficacy has been very stable. Spraying its 100 times liquid in mid-March, has good effect on the prevention and treatment of fruit tree diseases, especially the rot disease. ...