拿捕净、威霸是农田阔叶作物防除禾本科杂草的新型苗后除草剂。我们在本所中棉12棉田中用12.5％拿捕净、6.9％威霸进行除草效果试验,初步掌握了规律,为生产上棉田化学除草技术的推广提供了依据。 1 方法 设3个处理,即12.5％拿捕净3750ml/hm~2,6.9％威霸1200ml/hm~2和清水对照,试验随机区组排列,小区面积26.68m~2。喷药时间为5月20日(棉花一片真叶,杂草2～4叶),采用工农16 Take net capture, Wei Pa is a new field of broad-leaved crops weed control herbicide after weeding. We used 12.5% ​​of net catches net and 6.9% of Wei Pa for weeding experiment in Zhongmian cotton 12 cotton fields, initially grasped the law and provided the basis for the promotion of chemical weeding technology in cotton field. 1 method set three treatments, namely 12.5% ​​net catch 3750ml / hm ~ 2,6.9% Wei Pa 1200ml / hm ~ 2 and water control, the test randomized block arrangement, the plot area of ​​26.68m ~ 2. Spraying time for May 20 (a piece of cotton leaves, weeds 2 to 4 leaves), using workers and peasants 16