大同市地处山西省北部,属于高纬度、高海拔的冷凉地区,主要种植的农作物有玉米、谷黍、莜麦、高粱、春小麦等禾谷类作物和其他杂粮。近年来,黑穗病发生与为害逐年加重,成为禾谷类作物的主要病害。发病面积达10万hm2,占禾谷类作物播种面积的65%,一般田块发病率5%～10%,严重田块 Datong is located in the northern part of Shanxi Province, belonging to high latitudes and high altitude cold areas. The main crops are corn, millet, oats, sorghum, spring wheat and other cereals and other cereals. In recent years, the occurrence and harm of smut have increased year by year, becoming the main disease of cereal crops. Incidence of up to 100,000 hm2, accounting for 65% of the sown area of ​​cereal crops, the general field incidence of 5% to 10%, serious field