棉花烂铃综防技术１合理追肥：棉株长势旺的要晚施，少施肥。避免偏施氮肥，合理增施磷钾肥。８月中旬至９月上旬，可用磷酸二氢钾根外追肥，促使棉铃早开裂。２整枝摘叶：对生长过旺的棉田，应及早把老枝，老叶和无效蕾、花、铃一起剪去，抓好打边心、剪叶枝、抹赘芽... Cotton boll attack prevention technology 1  rational top dressing: cotton plant growth vigorously to be applied late, less fertilization. Avoid partial nitrogen fertilizer, a reasonable increase in phosphorus and potassium fertilizer. From mid-August to early September, available potassium dihydrogen phosphate root top dressing, prompting cotton boll early cracking. 2  Pruning pick leaves: Growing over cotton fields, as soon as possible the old branches, old leaves and ineffective buds, flowers, bells cut together, do a good job beating heart, cut leaves, wiped buds ...