First, timely picking. After cotton bolls, it is usually picked every 5-7 days. If picking is too early, cotton fiber has not been fully matured, and the yield and quality have been reduced; when it is picked too late, the cotton wool will reduce the fiber tension, the color will be polluted, and the quality of the cotton will also be reduced because of the wind and sun exposure. Therefore, the cotton batting stage must be timely refined. Slurry, improve cotton fiber quality and grade. Second, prevent rain. When the mature cotton wool is exposed to rain, the pigments of the cotton husk, cotton leaf, and wrapper will contaminate the cotton fiber, causing the white cotton fiber to appear yellow, red, gray spots. If you encounter continuous rain, it will also cause mild deterioration. Therefore, we must keep abreast of the weather changes, pay attention to the weather forecast, and grab the cotton before the rain. Third, do a good job of "four points." When picking cotton, it is necessary to extract the good flowers, frozen petal cotton and landing cotton, separate them from the sun, and store them separately. They must not be mixed together for the purpose of classification and sale. When drying in cotton, avoid drying in the concrete floor and drying area, apply breathable bamboo curtains, bamboo baskets, and separate the sun in order to ensure the quality of cotton. Fourth, spray ripening. In the late stage of cotton boll opening, mature ripening bells are ripened with pesticides to enable them to receive flowers in advance. This will not only reduce the damage of autumn rain, but also increase the quality of cotton by more than 20%, and it can also draw culms in advance for 5-7 days, which will facilitate the sowing of the Xiaochun crops. The ripening method is: the application time, to grasp the majority of the cotton field after the late cotton boll to 40 days or more, cotton fiber has basically matured, the daily maximum temperature of 20 °C above. Otherwise, the quality of the fiber will be reduced and the effect of spraying will be affected. Apply pesticides, use 40% ethephon 150 grams per mu of cotton fields, water 60 kg, or use 20% grams of traceless water agent 125-150 milliliters, watered 25-30 kilograms, fully stirred and sprayed on the cotton plant Leaf and middle and upper bells can be sprayed once. Three days after spraying, the leaves began to fall off, and the dehydration of the bells began to spew. It should be noted that to select the rain-free sunny days from 10 am to 2 pm spray, spraying after the rain to re-spray once. Breeding of fine varieties of cotton is not allowed to ripen with drugs. Cottonseeds that have been cooked with drugs cannot be used as seed. China Agricultural Network Editor
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