玉米丝黑穗病是玉米上的重要病害之一,遍及国内外玉米产区。甘肃陇东、陇南、中部以及河西等地都早就有发生,近年来更趋严重,一般发病率为6—20％,严重者达60％以上。此病一经发生,就破坏雌穗,造成的损失较大。为了防治该病,1987年以来在甘谷、酒泉进行了国产羟锈宁防治试验研究,取得了良好防效。现将结果报道如下。 Corn smut is one of the most important diseases on maize. It is widely distributed in corn producing areas at home and abroad. Gansu Longdong, Longnan, central and Hexi have long occurred, in recent years more serious, the general incidence of 6-20%, severe cases of more than 60%. Once the disease occurs, it will destroy the ear, causing a greater loss. In order to prevent and treat the disease, since in 1984 in Gangu, Jiuquan conducted a trial of domestic control of trimethoprim, and achieved good control effect. The results are reported below.