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我场地处洞庭湖区。棉花生长前期常受5月低温影响而迟发;6月梅雨生理落蕾严重。棉花产量主要靠中、上部成铃,而中上部棉铃发育成熟期,往往与红铃虫第三代发生期相吻合,所以改进红铃虫药治技术十分重要。 一、药剂防治策略: 在综防措施中,药剂防治仍是控制红铃虫的主要手段。红铃虫的发生,有以下几个特点可供制定防治策略注意。 1.第一代发生很不均匀,与越冬虫源远
My field is located in Dongting Lake area. Early cotton growth is often affected by low temperature in May and late; June plum serious physiological rains. Cotton yield mainly by the middle and upper part of the boll, and middle and upper part of boll maturity, often with the occurrence of the third generation of pink bollworm coincide, so the improvement of pink bollworm drug treatment technology is very important. First, the chemical control strategy: In the comprehensive prevention measures, chemical control is still the control of pink bollworm’s main means. The occurrence of pink bollworm, there are several characteristics available for the formulation of prevention and control strategies attention. 1. The first generation occurred very uneven, far with the source of overwintering insects