在前几年研究化学去早蕾的基础上，进一步探讨了化学去早蕾控制红铃虫和烂铃的原因。化学去早蕾调节了棉花生育期，使棉花现蕾高峰期和易感育铃高峰期避开了红铃虫的产卵盛期。棉铃铃壳中棉酚含量提高，增加了红铃虫幼虫的死亡率。去早蕾棉株棉铃着生的果枝层次和节位明显提高，改善了棉田光、湿条件，不利于烂铃的发生。 On the basis of previous studies on chemical premature buds, we further explored the reasons for the chemical premature bud control of pink bollworm and rotten bollworms. Chemistry to early bud regulation of cotton growth period, so that the peak of cotton budding and susceptible bell peak to avoid the peak of pink bollworm spawning period. Cotton boll shell gossypol content increased, increasing the mortality of pink bollworm larvae. To early bud cotton bolls with the branches of the fruit level and node significantly improved to improve the light and wet conditions of cotton is not conducive to the occurrence of rotten bell.