草地螟是山西中、北部地区粮食、经济作物及牧草的重要害虫。近十年来由内蒙古向南逐渐蔓延扩大。1951年仅限于雁北的大同、怀仁、应县及朔县部分草滩上,1953年延及雁北全区与忻县专区局部地带,1954年更向南扩展到晉中盆地的太原、榆次、太谷、清徐、祁县、汾阳。其中雁北、忻县两盆地 Grasshopper is an important pest of food, cash crops and pasture in the central and northern Shanxi Province. In the past ten years, Inner Mongolia gradually spread and expanded southward. In 1951, only in Datong, Huairen, Yingxian, and Shuoxian parts of Yanbei, it was extended to some areas of Yanbei area and Xinxian area in 1953, and expanded to the south of Jinzhong basin in 1954, Times, Taigu, Qing Xu, Qixian, Fenyang. Among them, Yanbei and Xinxian two basins