小麦白粉病原来主要分布在我国西南高原,近几年来,在我省逐渐蔓延开来,成为小麦主要病害之一。我县1979年发生面积160余亩,严重田块减产5—7成。1980年发病面积突增到52,630亩,占小麦总面积的32.1%。由于预报准确,防治得力,一般损失不大。 Wheat powdery mildew was originally mainly distributed in the southwestern plateau in China, in recent years, gradually spread in our province, as one of the major diseases of wheat. Occur in 1979, my county area of ​​more than 160 acres, a serious reduction of 5-7 percent field plots. In 1980, the disease area suddenly increased to 52,630 mu, accounting for 32.1% of the total wheat area. As the forecast is accurate, effective prevention and control, the general loss is not large.