棉铃虫发生规律及其防治

• 机 构: 上海市农科院土保所,
• 出 处: 上海农业科技
• 发表日期: 1974年07期
• 关键词: 棉铃虫 发生世代 棉花产量 大发生 花蕾 滞育 成虫寿命 蛹期 历期 越冬代

棉铃虫是棉花蕾花期的一大虫害,上海地区历年都有不同程度的发生,为害棉花。七一年大发生,严重影响棉花的产量。近几年来,郊区广大贫下中农和植保人员,在研究棉铃虫发生规律及其防治技术方面,取得了不少经验,为控制棉铃虫为害,提高棉花产量作出了成绩。发生规律(一)发生世代棉铃虫在上海地区一年发生五代。第四

Cotton bollworm is one of the major pests in cotton bud stage. Shanghai has varying degrees of occurrence over the years, and it is harmful to cotton. In 2001, a serious impact on cotton production. In recent years, the vast majority of rural poor and middle-income peasants and plant protection workers in the suburbs have made a lot of experience in studying the law of occurrence and control of cotton bollworm and have made achievements in controlling cotton bollworm damage and increasing cotton yield. Occurrence (a) occurred in the generation of cotton bollworm in Shanghai for five generations a year. fourth