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玉米螟在东台市棉区一年发生3代。近几年来危害猖獗,已成为棉花生产值得重视的问题,以二、三代为甚。我们对二、二代卵在棉株上的分布分别进行了调查。其结果是: 二代卵(7月中、下旬):全部产卵于第一
Corn borer occurs in Dongtai cotton area three generations a year. The harm has become rampant in recent years and it has become a problem that deserves attention in cotton production, taking the second and third generations as its priority. We investigated the distribution of the second and second generation eggs on cotton plants. The result is: second-generation eggs (mid-July, late): all spawn in the first