(1) By adjusting the birth process of cotton, the beginning of cotton bursting bolls is staggered with the local autumn rain period, reducing the occurrence of rotten bells. (b) Adopt controlled plant cultivation to make the cotton fields airy and transparent. The scientific method is to train cotton into an ideal plant type through rational arrangement of plant spacing, proper fertilizer and water management, and the use of methods for the control of biological regulating substances and artificial pruning. Keep the cotton fields with good ventilation and light transmission conditions to reduce the humidity in the cotton fields and reduce the occurrence of rotten bells. How much nitrogen fertilizer is applied later has a direct relationship with the number of rotten bells. Therefore, do not apply nitrogen fertilizer to cotton fields that grow more vigorously in the later period. Otherwise, it will increase the occurrence of rotten bells. (3) Spraying chemical agents before the occurrence of the rotten bell has a certain effect on the prevention and control of rotten bells. Pharmacy includes Bordeaux mixture, zesin zinc, Fuminlong and others. (D) timely picking off the old ripe peach. Grasp the law of cotton rotten bell, ranging from rotten bell to put the mature cotton boll back, peeling into the flower. The so-called old ripe peaches, that is, the yellow-peeled peaches with a bell-tightness period of more than 50 days, and the cracked-pepper peaches whose cracks in the cotton husks have not yet spittled. Take one by one and pick it up until it is estimated to happen frequently. Pick ripe peaches to grab a sunny day and pick it up with the peeling sun to avoid stuffy heat and rot. Source: Modern Rural News