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大螟在苏北稻区1a发生3～4代,主害代第三代主要为害中晚稻。大螟寄主范围广泛,一代主要发生在稻田外,二、三代在稻田内转株为害。大螟在不同生境寄主上发育进程有差异。依据其发生特点,制定了大螟的有效治理策略。
Sesamia in rice in northern Jiangsu 1a occurred 3 to 4 generations, the main generation of the third generation of the main damage to late rice. Arborvitae host a wide range of generation occurred mainly in the paddy fields, two or three generations of transplants in the rice field damage. Stem borer in different habitats on the development of the host there are differences. According to the characteristics of its occurrence, developed an effective control strategy for Sesamia inferens.