棉花化控是投入产出比最高的技术,药物亩投入仅几元,应用好了能增加几十倍、上百倍的收益。化控作用最重要的时期是棉花苗蕾期,但很难把握好最佳施用时间和施用量,因此,化控既是一项很重要的技术,又是一项比较难的技术。现将笔者对棉花化控的体会介绍如下。一、棉花苗蕾期化控的唯一根据是 Cotton chemical control is the highest input-output ratio of technology, drug mu investment only a few dollars, the application of a good can increase dozens of times, hundreds of times the proceeds. The most important period of chemical control is cotton bud stage, but it is difficult to grasp the best application time and application rate. Therefore, chemical control is not only a very important technology, but also a more difficult technology. Now the author of cotton control experience described below. First, cotton seedling buds the only basis for chemical control is