Chemical regulation must be based on the growing trend of the cotton and weather conditions, focusing on prosperous cotton fields, soil water shortage, cotton growth should be used less or not. For Shenglei and cotton fields with a long growing trend in the early flowering period, use 1.5 to 2.5 grams of shrinkage for each acre and spray 20 to 35 kilograms of water. For a flourishing flower growing season, use 2 to 3.5 grams of shrinkage per acre, dilute 30 to 35 kilograms, spray on the surface of the cotton plant to control the growth of the cotton plant, so that the daily growth of the main stem of the cotton plant is controlled at 3 cm The following; 7 to 8 days after the cotton topping, the general use of shrinkage 3 grams per mu, about 30 kg of water, spraying cotton plants on the top and side of the heart, can simplify the late pruning, add early autumn peach, increase the weight of the bell To prevent late marriage. After long-term control of cotton fields, it is necessary to strengthen management, pay attention to fertilizer and water operations, and do so under the promotion of control. After preventing the use of regulators, the cotton leaf color is dark green without top dressing or watering, and the management is relaxed, resulting in early decline in production.
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