近几年来,随着早熟三号大麦的扩大,郊区大麦黄花叶病有所发展。据调查,今年有的县发病面积达5～6万亩,比较严重的约3万亩,对产量影响较大。如南汇县有个生产队25.4亩重病麦田,平均亩产198斤,比不发病麦田减产522斤。另外一个生产队重 In recent years, with the expansion of precocious barley III, yellow barley leaf disease has developed in the suburbs. According to the survey, the incidence of some counties this year, an area of ​​5 to 6 acres, more serious about 30,000 acres, a greater impact on the yield. For example, Nanhui County has a production team of 25.4 mu of seriously ill wheat fields, with an average yield of 198 kg per mu and a decrease of 522 kg less than that of non-affected wheat fields. Another production team heavy