How to manage the rain during the cotton boll opening period?

How to manage the rain during the cotton boll opening period? Do you have any good suggestions? Also ask experienced netizens to help introduce that the rain during the cotton boll opening period is very unfavorable to the normal boll opening of cotton, so the farming network has sorted out five management methods for the rain during the cotton boll opening period, which are listed in detail below for netizens' reference. Method 1. Timely drainage to prevent cotton lodging: because August and September coincides with the cotton boll opening period, if there is more rainfall in some places, the cotton field with stagnant water should be removed from the field in time after rain. prevent cotton plants from yellow leaves and rotten roots caused by waterlogging Although there is no stagnant water in the field, the cotton field with heavy clay and waterlogging can dig trenches and seepage in the cotton row, reduce the humidity on the surface of the cotton field and improve the growth environment of the cotton field. Soil cultivation must be carried out in time after heavy rain to prevent cotton from lodging. Method 2. Timely arrangement of cotton branches to prevent rotten bolls: high humidity in cotton fields after rain, such as closed branches and leaves of cotton, is easy to cause black and rotten cotton bolls in the middle and lower layers. The buds after "the Beginning of Autumn" and the flowers, buds, empty branches and yellow leaves after "White Dew" should also be removed as soon as possible to improve the ventilation and light transmission conditions of cotton fields and reduce rotten bolls. For the lower rotten bolls whose boll period is more than 40 days, the bell shell has faded or yellowed, or the lower part of the rotten boll that begins to grow black spots should be picked in time, and the seed cotton with better bolting can be obtained by dipping it in 1% ethephon solution and drying it. Method 3. Applying extra-root topdressing to cotton to prevent premature senescence: the root activity and fertilizer absorption ability of cotton decreased in the later stage of growth, and cotton was easy to senescence in the later stage, and the effect of extra-root topdressing was better. The mixture of 0.2% potassium dihydrogen phosphate or 2% potassium chloride and 2% superphosphate plus 1% urea was sprayed evenly and once every 7 days for 3 times per mu, which had a good effect on preventing premature senescence, increasing boll weight and promoting multi-knot autumn peach, especially for cotton fields lacking fertilizer due to water stains. The spraying time is after 4 p.m. Or on a cloudy day. Method 4. Timely prevention and control of diseases and insect pests: for example, continuous rain and low temperature can easily lead to the occurrence of diseases and insect pests such as cotton red leaf stem blight, cotton wilt, rotten boll, cotton bollworm, red bollworm, Spodoptera litura, Bemisia Tabaci (also known as cotton whitefly) and so on. Cotton red leaf stem blight is a physiological disease, combined with cotton to prevent premature senescence, spraying potassium dihydrogen phosphate aqueous solution to prevent it as early as possible. For cotton Verticillium wilt and cotton boll rot, the mixture of 1000 times of chlorpromazine or 1000 times of allicin and 1000 times of methyl thiophanate wettable powder or 70% chlorothalonil wettable powder can be used to control cotton wilt and boll rot. For cotton bollworm, red bollworm, Spodoptera litura and so on, 20% methomyl EC 1500 times or 2.5% fenvalerate EC 1000 times can be used for spray control. Bemisia Tabaci can be trapped and killed by yellow board or sprayed with 1000 times of imidacloprid and 1.8% avermectin 1500 times. Method 5. Spraying ethephon to promote cotton boll opening in time: in cotton fields with a large proportion of late ripening or autumn peaches, cotton fields can not ripen normally and open bolls smoothly before frost. Spraying ethephon timely and appropriately can make cotton bolls open bolls early and improve yield and quality. The use of ethephon to accelerate ripening should not be premature, generally in early October, when the highest temperature is more than 20 ℃, using 40% ethephon 150,200ml per mu, 50 kg of water, spraying the whole cotton plant, focusing on the upper late autumn peach, can promote early ripening and reduce rotten bolls. In order to ensure the efficacy, it should be mixed with alkaline pesticides and should not be mixed with alkaline pesticides. How to choose and buy Cotton Seeds what to do before sowing Click to get more Cotton planting techniques Click to get more Food crop planting techniques