小地老虎在我市一年发生3～4代,其中第二代历年发生较轻,主要是气侯条件不适宜,加之发生分散,所以一般年份成不了灾。1996年我市二代小地老虎发生危害比较重,尤以夏播玉米、大豆田发生最重,这两种作物正直苗期,夏玉米6～7片叶,夏大豆5～7片叶真叶,因受二代小地老虎危害造成严重缺苗断垄,经田问调查,一般玉米 Small tiger occurred in our city 3 to 4 generations a year, of which the second generation occurred over the calendar year light, mainly due to unfavorable weather conditions, combined with the occurrence of dispersion, so the general year into a disaster. In 1996, the second generation of Landrace in our city was harmed hardest, especially in summer sowing corn and soybean field. Both of these crops had the positive seedling stage, 6-7 leaves of summer maize, 5-7 leaves of summer soybean , Due to the second generation of small tigers caused serious shortage of seedlings broken ridge, by field investigation, the general corn