The diseases causing rotten bells mainly include red rot, pink powder, black fruit disease, epidemic diseases, etc. Therefore, it is necessary to promptly control the drug when there is a rotten bell in the cotton field. 40% medium-protective charcoal (Duofu bromide nitrile) 1000 times liquid, or 90% ethyl phosphorus aluminum wettable powder 600 times liquid, can have certain control effect, but in view of its resistance, it is best to sterilize Alternate or mixed use of the agent; can also be sprayed with 72% downy mildew (cream urea • manganese zinc) wettable powder 600 times solution. Spray 75-100 kg per acre, spray once every 10 days, and spray 3-4 times. In addition, the old leaves and rotten bells should be removed in time to increase the ventilation and light transmission in the field and reduce the number of bacteria.
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