一、发生特点1.二化螟在我县麦茬水稻发生1代。成虫盛发期为7月上旬至8月上旬，8月中旬幼虫进入危害盛期，成虫产卵于叶鞘处。2．三化螟发生2代。第一代蛾峰期在7月初，第二代幼虫7月中旬盛孵，第二代蛾峰期在8月上中旬，第三代幼虫于、8月下旬盛雅。以第三代幼虫危害重，印产 First, the occurrence of characteristics 1. Chilo suppressalis stubble rice in our county occurred 1 generation. Adult vigorous period from early July to early August, mid-August larvae into the damaging period, the adult spawning in the sheath. 2. Three generations of rice borer occurred 2 generations. The first generation of moth peak in early July, the second generation larvae hatch in mid-July, the second generation moth peak in mid-August, the third generation of larvae in late August Shengya. Third-generation larvae endanger heavy, Indian production