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赣西北稻区近１０年来，一代二化螟的发生和为害具有明显的时差，发育进度不整齐，四种虫态有重叠；蛾辐拉长，蛾峰频次多；被害状多，为害时间长。影响时差的因子是：末代幼虫的滞育现象；幼虫越冬场所多，生境差异大；幼虫转移栖息推迟发育进度；春季气温变幅大；早稻插秧进度不齐，品种熟性有别，苗情与虫情吻合程度不一。防治对策：改进测报方法，以不同虫源田预测不同蛾峰；预测与验证相结合，及时矫正误差；设置诱测田兼作验证田；改一次用药为分次用药；重视一季晚稻田的防治。
In the past 10 years in the northwestern Jiangxi Province, the occurrence and damage of the striped stem borers (Chilo suppressalis) were significantly different from each other, with uneven development and four larvae overlapping. The larvae grew more frequently and moths were more frequent . The factors influencing the time lag are: the diapause phenomenon of the last larvae; the larvae overwintered the habitat, the difference of the habitat is big; the larvae transfer the habitat postponed the progress of development; the temperature fluctuates greatly in the spring; the progress of the early rice transplanting seedling is different, Bugs match different degrees. Prevention and control measures: to improve the method of detection, prediction of different moth peaks with different insect fields; combination of prediction and verification, timely correction of errors; set induced field and verify the field; to change the medication for the sub-medication;