确定棉花的最佳现蕾期和结铃期,并加以重点保护是棉花综防技术的基础工作。近年来将1985～1987年的研究结果应用于病虫治理,取得了明显的效果。1 最佳现蕾结铃期的确定棉花的有效开花时间为7月6日至9月12日。从7月18日起有效结铃数量激增,日增有效铃占总铃数的2.2%;从8月16日起日增有效铃又下降1%。在结铃高峰期内,有效铃 Determining the optimal cotton bud stage and bolting period, and to focus on the protection of cotton technology is the basic work. In recent years, the research results from 1985 to 1987 have been applied to pest and disease control and achieved remarkable results. 1 to determine the best budding period of bolls cotton effective flowering time for July 6 to September 12. Since July 18, the number of effective bell surge has risen sharply, with the effective bell increasing by 2.2% of the total number of bell bolls; the effective bell dropping by 1% since August 16. In the peak bell period, effective bell