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棉花整枝是栽培管理中的一项措施。1975年,我们根据棉铃虫喜欢在棉花顶心、旁心、赘芽、小叶和蕾花桃的苞叶上产卵的习性,把这项措施当作农业防治的重要一环来抓,收到了良好的效果,减少了当代棉铃虫60％的卵量和80％的1—2龄幼虫量。 棉铃虫在我们大队一年发生五代,除第一代外,其余各代均发生在棉田内。发生在棉田内的棉铃虫,其产卵部位也各不相同。6月中旬,生长好的棉花已开始现蕾,此时第二代棉铃虫多选择长势好、现蕾早的一类苗产卵,90％以上的卵量产在棉株上部1—4片叶的正面;7月中旬棉花大量现蕾开花,
Cotton pruning is a measure of cultivation and management. In 1975, we took this measure as an important part of agricultural prevention and control based on the habit of cotton bollworms like to lay eggs on the tops, side hearts, buds, leaflets and buds of cotton buds and received Good results, reducing the amount of contemporary cotton bollworm 60% of the amount of eggs and 80% of the first 1-2 larvae. Cotton bollworm occurs five generations a year in our brigade, except for the first generation, the remaining generations have occurred in the cotton field. The cotton bollworm that occurs in the cotton field has different spawning sites. In mid-June, growing cotton has begun to squash, then the second generation of cotton bollworm choose to grow well, a class of early budding budding spawning, more than 90% of the eggs in the upper part of the cotton plant 1-4 The front of the leaves; in mid-July a large number of cotton buds blossoming,