在洞庭湖区。发现大螟Sesamia inferens Walker和列星大螟Sesamia vuteria(stoll)幼虫为害棉花,被害率为0.1—0.2％,个别严重的年份在0.5％左右,而且多发生在9月中旬以后,两种幼虫一生能转移为害3—4个棉桃,被钻食的棉桃,几乎全部烂掉。 大螟和列星大螟在本区的第一代至第三代以为害玉米、高梁、芦苇、甘蔗为主(大螟还为害水稻),偶尔还为害莎草、三稜草,但对棉茎也小有为害,被害率在0.03％以下。国营大通湖农场植保站在1983年5月查到大螟和列星大螟为害棉花,被害率在0.02％以 In the Dongting Lake area. It was found that Sesamia inferens Walker and Sesamia vuteria (stoll) larvae infest cotton, the damage rate was 0.1-0.2%, some serious years were about 0.5%, and more occurred in mid-September, the two larvae ’s life Can be transferred to damage 3-4 bolls, was drilled in the peach, almost all rotting. Sesamia inferens and Sesamia inferens are mainly maize, sorghum, reed and sugar cane in the first generation to the third generation in this area (Sesamia inferens also damage rice) and occasionally sedge, Stems are also small and harmful, the victimization rate of 0.03% or less. State-owned Chase Lake Farm Plant Protection Station in May 1983 found Sesamia inferens and Sesamia inferens damage cotton, the damage rate of 0.02%