亚洲玉米螟已成为棉花上一种重要的钻蛀性害虫。该虫在棉田落卵量大，幼虫孵化率高，幼虫可为害棉花嫩头、叶柄、蕾、铃、茎杆等多种器官。根据同龄幼虫在棉花不同器官之间的分布，计算出１头幼虫一生破坏棉花器官二代为３．３７３个，三代为２．２０２个。通过各龄幼虫存活情况，估算出１块卵孵出的幼虫二代可为害棉花蕾７．４６个、嫩头７．１２个、棉桃３．３２个、钻蛀茎杆３．３２次，三代破坏棉铃９．９７个、嫩头２．４４个、茎杆１．２６次。 Asian corn borer has become an important cotton borer insects on cotton. The insects in the cotton field large amount of eggs, larvae hatching rate, larvae can damage cotton tender, petiole, bud, bell, stalks and other organs. According to the distribution of the same age larvae in different organs of cotton, one larvae destroyed 3.373 second-generation cotton organs and 2.202 third-generation ones. According to the survival of larvae at different ages, it is estimated that the number of second-generation larvae hatched in one egg hatch is 7.46, the tender head is 7.12, the budded 3.32, the boring stem 3.32, Destroy cotton boll 9.97, tender 2.44, stem 1.26 times.