Drainage and drainage. Quickly eliminate clear water, reduce waterlogging in the cotton fields, and dig deep into the three channels to ensure that the channels are open, the surface water is drained quickly, the latent water is drained, and the groundwater is lowered.
Help seedlings loose soil. Immediately after the flooded cotton field drains, the fallen cotton plants are straightened, and the soil is stabilized and the plants grow upright. Improve the ventilation and light conditions of cotton fields and reduce the losses caused by lodging. After the cotton field is a little dry, the soil is removed in a timely manner to improve the aeration state of the soil, and the root system is restored to a normal physiological function.
More competition for autumn peaches. After the cotton has been affected, the growth period is obviously postponed. Fertilizer should be applied in time to prompt the cotton to return to life. Per acre with 0.2% potassium dihydrogen phosphate and 2% of the urea mixture 50 ~ 75 kg, or spray Shi Bao or leaf flour 5 ~ 10 ml of water spray 40 ~ 50 kg. The first foliar spray was sprayed 5 to 7 days later. After the cotton grows normally, 10 ~ 15 kg of urea is applied per mu. The loss of potassium in the cotton fields with water should be supplemented with potash fertilizer, applying 10 kg of potassium sulfate per mu. Through the supplement of fertilizer materials to accelerate the growth and development of cotton, promote early knot, multi-junkie, prevent premature aging.
Prevent pests. Suffering from cotton, the stamina is relatively full, and the growth is young in the later period. It is suitable for the occurrence of four generations of cotton bollworm and leaf roller. It is necessary to pay attention to timely prevention and treatment. Where 100 field plots with more than 150 larvae of more than two instars should be treated immediately with pesticides. The control of cotton bollworm can be used 50% cotton boll, 40% Jiaxinbao, 20% methomyl 1500 ~ 2000 times the liquid spray; control leaf roller can be used 40% of monocrotophos 1500 times spray. If rotten bell occurs, it should be promptly sprayed with 0.8:0.8:100 Bordeaux mixture or carbendazim gel suspension 800-1000 times.
Chemical ripening. Due to the late occurrence of cotton buds, the proportion of flowers after the frost tends to be large. In order to avoid this phenomenon, you can choose sunny noon in early October, use 10-15 milliliters of ethephon per acre, and spray 40-50 kilograms of water to make the boll bell crack earlier and strive for more prefrost flowers.
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