本研究1986～1990年在山西运城地区进行。结果表明:6月20～30日,人工去除地膜棉株下部1～3个果枝上的早蕾后,对铃病具有明显的防治作用,相对防病效果达81.8～93.0%。其防病的机理,与去除早蕾后的时、空避病作用有着密切的关系。同时,结果还表明,试验处理的株高增加15.9厘米,单株铃重增加0.38克,单株铃数增加2.8个。处理和对照的衣分之间无显著差异。去除早蕾后.试验处理主茎叶内的叶绿素含量、蛋白质含量和可溶性糖含量均比对照增高;棉纤维的主要物理性能得到了进一步改善。5年间,试验处理皮棉产量增高17.8～18.0%。 The study from 1986 to 1990 in Shanxi Yuncheng area. The results showed that on June 20 ~ 30, the bollworm pretreatment on the 1-3 lower fruiting branches of cotton mulching had obvious preventive and curative effect on bell disease, with the relative disease prevention effect reaching 81.8-93.0%. The mechanism of disease prevention, and remove the early bud when the role of empty avoidance is closely related. At the same time, the results also showed that the test plant height increased by 15.9 cm, boll weight per plant increased 0.38 grams, an increase of 2.8 bolls per plant. There was no significant difference between treatment and control lint. After the early bud was removed, the chlorophyll content, protein content and soluble sugar content in the main stems and leaves of the experiment were higher than those of the control. The main physical properties of cotton fiber were further improved. During the five years, the test treatment lint yield increased by 17.8 ~ 18.0%.