Scientific control of cotton

Chemical control must be flexible according to cotton growth and weather conditions, focusing on prosperous and long cotton fields, soil water shortage, cotton growth should be used less or not. For the cotton fields with prosperous growth trend in full bud and early flowering stage, 1.5 ~ 2.5 grams per mu should be sprayed with 2035 kg water. For the prosperous and long cotton field at full flowering stage, the cotton plant should be sprayed with 2 ~ 3.5g / mu and 30kg / mu of water, so as to control the growth of the cotton plant and control the daily growth of the main stem of the cotton plant below 3cm. In 7-8 days after cotton topping, it is generally used to reduce Jiean 3 grams per mu with about 30 kg of water. Spraying on the top and edge of cotton plants can simplify late pruning, increase early autumn peaches, increase boll weight and prevent greedy green and late ripening. After the chemical control of prosperous and long cotton fields, we should also strengthen management, pay attention to fertilizer and water operation, and achieve lower promotion and upper control. To prevent the use of regulators because of dark green cotton leaves and not topdressing, not watering, loosening management, resulting in premature senescence and yield reduction.