How to control cotton rotten bolls (peaches)?

How to prevent and cure cotton rotten boll (peach)? Please introduce the method of cotton boll rot, which mostly occurs from mid-late August to early September. During this period, if it is wet and overcast, the cotton field is hidden, and the ventilation and light transmission is poor, many kinds of bacteria will breed rapidly. The common cotton boll rot diseases are anthracnose, black fruit disease, blight, red rot, powdery mildew, soft rot and so on. The light ones can not open bolls normally, the floc decreases, the heavy bolls can not crack, and the shell is rotten without harvest, which seriously affects the high yield and high quality of cotton. The prevention and control measures are as follows: first, when there are too many Rain Water in the middle and later stage of waterproof cotton, attention should be paid to timely clearing ditches and drainage to reduce soil moisture in cotton fields, so as to prevent premature root senescence and reduce boll rot. Second, pruning in the later stage of fine pruning is an effective measure to reduce nutrient consumption, improve ventilation and light transmission, and prevent boll rot. In late August, the top of the upper fruit branch and the ineffective buds in the middle of the cotton plant were removed to reduce nutrient consumption. The old branches with no function in the lower part and all empty branches are also removed to reduce the concealment of cotton fields, increase ventilation and light, and promote the smooth opening of mature bolls. 3. Chemical control for cotton fields that have developed boll rot disease, Bordeaux solution of 1purl 100, or 400 times of mancozeb, or 600 times of mancozeb, can be sprayed 2 times 3 times, and the effect of preventing boll rot is obvious. Fourth, early picking rotten bolls in case of overcast and rain, when rotten bolls are found, cotton bolls over 40 days old and lower cotton bolls with black spots can be removed. After soaking with 0.5%-0.1% ethephon, drying can become normal boll opening, which has no effect on boll weight and quality. Fifth, push the plant and ridge in the tightly sealed cotton field, you can take advantage of the sunny day to push the cotton plant by hand and step on the root of the cotton plant to the outside, so as to make the cotton plant tilt out and divide a ventilation duct. After 5 days and 7 days, the two rows of cotton plants with ridges were pushed aside and stepped on the side, which could reduce the humidity between the rows and reduce the rotten bolls. Sixth, ploughing and dispersing dampness in combination with pushing plants and ridges at the same time, ploughing can also play a role in loosening soil and dispersing dampness and reducing rotten bolls. 7. Phosphorus and potassium should be added to the growing cotton fields as early as possible, and about 20 kg of calcium phosphate and 10 kg of potassium sulfate should be applied per mu. From mid-August to early September, 150 kilograms of potassium dihydrogen phosphate per mu was sprayed with 40 kilograms of water for 3 times to promote cotton bolls to crack and open bolls as soon as possible. 8. Spraying ethephon in cotton field can improve the disease resistance of green boll, promote the early fall of old leaves, prevent field depression, promote cotton boll early cracking and early boll opening. The method is about 20 days before Frosts Descent, 40% ethephon 150 million 200 grams, 50 kilograms of water, can be evenly sprayed. Click to get more cotton planting technology click to get more food crop planting technology