地下害虫是当前保苗工作中最主要的问题之一,受害地区一般缺苗1成以上,严重的缺苗3—4成,甚至犁毁改种。1953年江苏省徐州、淮阴、扬州等专区15县23乡的调查,冬麦因地下虫为害平均缺苗15.24％。河南省地下虫亦极普遍,据该省农事试验场1954年春季在开封市郊的调查,小麦受蝼蛄为害最轻的缺苗 Underground pests are one of the most important problems in the current seedling maintenance work. The affected areas generally have over 1% of the total lack of seedlings, 3-4% of the serious lack of seedlings, and even the plows are destroyed. 1953 Xuzhou, Jiangsu Province, Huaiyin, Yangzhou and other counties 23 counties 23 counties, winter wheat due to underground insects on the average lack of seedlings 15.24%. Underground insects are also extremely common in Henan Province. According to a survey conducted in the spring of 1954 in the province’s agricultural experimental field in the suburbs of Kaifeng, the lightest lack of wheat