Cotton planting techniques: how to manage cotton in August?

How to manage cotton in August? Please introduce the method. August is the period from cotton blossom to boll opening. It is the key period of protecting summer peach and competing for autumn peach. The main task of cotton field management is to improve the ventilation and light transmission conditions of cotton field, maintain root activity, prevent greedy green late ripening, and prevent premature senescence. The main results are as follows: 1. Cotton fields with normal growth and heavy application of flower and boll fertilizer are usually applied once before and after 10 days. For the cotton fields with more bolls in the early stage, in order to meet the nutrient needs of a large number of bolls and increase the boll weight, it is usually necessary to apply top fertilizer. At the same time, for the cotton fields with excessive bud and boll shedding in the early stage and protecting the yield by bolls in the later stage, it is usually necessary to apply secondary capping fertilizer in order to strive for autumn peach, and the application time of capping fertilizer is usually around August 5 and August 20. About 5 kg urea per mu can be applied. Apply after rain or in combination with irrigation. 2. Note that late watering is the peak period of cotton bolls in August, when the temperature is still very high, the light is also strong, and the water consumption is large. In the areas along the Yangtze River, autumn drought is easy to occur after autumn, which often can not meet the water demand of cotton, so attention should be paid to timely watering in the development of drought. 3. Pruning the pruning in this period, in addition to beating the heart and continuing to remove crazy branches and superfluous buds, we should also hit the tip of the group once. The local cotton area usually needs to hit the tip of the middle and lower part of the cotton field in mid-August. When the upper fruit branch reaches more than 5 fruit nodes, the edge can also be removed. 4. Pest control in late August is usually the peak period for cotton bollworm, Spodoptera litura and red spiders. Spray with 48% Lesbon 60 ml and 50 kg water respectively. 15% paraben 20 ml with 50 kg of water spray. The individual cotton plant is larger in August, so the water consumption per mu must not be reduced. It is required to "turn twice and one button on all sides" when administering medicine, and choose the best effect from 4pm to evening, focusing on the spray on the back of the leaves. 5. Picking rotten bolls often occurs in cotton fields with too close rows and more overcast and rainy years in the later period, which seriously affects the yield and quality. In the cultivation measures, a small amount of empty fruit branches can be cut off, the row spacing should be relaxed properly, and the high ridge of dry cotton field should be changed from water to cultivate soil, which are all effective methods to prevent boll rot. In large-scale production, it is advocated to pick rotten bolls in time. Generally, cotton bolls with more than 45 days are basically mature, so if you encounter continuous rainy weather in late August, if you put more than 40 days in time, the boll shell has faded, turned yellow or the bolls with black spots have been removed and dried in the sun, you can get cotton with better bolting. Click to get more cotton planting technology click to get more food crop planting technology