白粉病对小麦产量有显著影响,据万县地区农科所调查,主要是每穗的粒数和千粒重下降,秕粒增加,病情愈重,影响愈烈。1973年我们协作组在万县地区共同进行了庆丰霉素防治小麦白粉病的初步试验,发现药效较高。1974 Powdery mildew has a significant impact on wheat yield. According to the survey conducted by the Agricultural Science Institute of Wanxian County, the number of grains per panicle and the decrease of 1000-grain weight have led to the increase of grains and the heavier the disease. In 1973, our collaborative group conducted a preliminary experiment on prevention and treatment of wheat powdery mildew with jingfengmycin in Wanxian area and found that the efficacy was high. 1974