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棉花红铃虫是我省棉区蕾铃期的主要害虫,也是长江流域棉区的重要害虫。随着棉花生产的发展,种植密度增加,肥水条件改善,棉花后期生长枝计茂密,纵横交错,用喷雾器喷雾,防治二、三代红铃虫时,田间行走困难,功效低,对棉花果枝机械损伤大,因而三代防治往往流于形式,且因长期使用滴滴涕、六六六农药,增强了红铃虫抗药性,还大量杀伤了天敌,致使防治效果下降,成本提高,长期使用有机氯,对
Red bollworm cotton bollworm cotton bollworm in our province is the main pests, but also an important pest in the Yangtze River cotton area. With the development of cotton production, planting density increased, fertilizer and water conditions improved, the late cotton growing branch count dense, criss-crossing, spray with a sprayer to prevent the second and third generation of red bollworm, the field walking difficulties, low efficiency, mechanical damage to cotton shoots Therefore, the long-term use of DDT and 666 pesticides enhances the resistance of the red bollworm and also kills natural enemies in a large amount, resulting in a decrease in the control effect and an increase in the cost and long-term use of organic chlorine.