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发生和为害大螟是水稻主要螟虫之一,食性广,除水稻外,还能为害玉米、甘蔗、茭白、谷子、高粱等作物以及芦苇、稗草等多种禾本科杂草。冬天主要以幼虫残留在稻根或上述植物残株根际过冬。由于寄主种类多,环境与食料不一,各代发生期也不大整齐,世代较重叠。在我县大体上一年发生四代。越冬幼虫4月间化蛹,4月下旬至5月上旬羽化,为第一代发蛾盛期,6月下旬至7月上旬为第二代,8月间第三代,9月中、
Occurrence and damage Sesamia inferens is one of the main stem borers in rice. Due to their wide feeding nature, they can also damage corn, sugar cane, catfish, millet, sorghum and other crops as well as reed and barnyardgrass. In winter, the larvae mainly remain in the rice roots or the rhizosphere of the above-mentioned plant winter. Due to the many host species, the environment and food are different, the occurrence of each generation is not neat, more overlapping generations. In my county, there are four generations in general. Overwintering larvae pupate in April, late April to early May emergence, for the first generation of hair moth bloom period, from late June to early July for the second generation, in August third generation, in September,