Dydropamine, also known as mepiperdine, mesitride, etc., is the most commonly used chemical control agent in cotton production. Generally, the effect can be seen within 3 days after use, and the effective period is 20 to 25 days. The main technical points of using full-scale chemical control of contractylamine are: in the process of cotton growth, with a small amount of multiple principles, the concentration and dose of medication should be light and heavy, and the specific time, dose, and frequency should be based on the management level, growth, and appearance of rainfall and fertilizer management. Such as flexible use, accurate grasp. 1. Soaking. If the cotton seed has not been coated, dilute amine is used to soak seed. Generally use 10 kg of water plus dilute amine powder 1-2 grams into a 100-200ppm solution, the selected cotton seeds soaked 8-12 hours to remove, drench water can be sown. This measure has a good effect on promoting root development and enhancing the resistance of cotton seedlings. 2. Spraying at the seedling stage generally takes place around June 20, according to growing trends, long-term medication. From the time of trifoliate to budding, 0.5-1 g of Dinocycline per acre can be used, and 20-30 kg of water can be quickly applied to the top of the plant (after soaking the seed can be postponed until budding). Spraying is required to be even, if necessary, the number of times can be appropriately increased according to the situation, the plant type can be appropriately controlled, the pruning fork can be simplified, and the water and fertilizer management can be coordinated. 3. The initial flowering period of 2-3 grams per acre with water spray 30-40 kg, can inhibit the prosperous, optimize the canopy structure, postpone the closure of the line, add the number of high-quality bell, simplify the mid-range pruning. 4. During the flowering period, spray is usually applied on August 15-25, with 3-4 g of monoamine powder per acre, spraying 40-50 kg of water on the leaves, mainly to inhibit the late inactivation of buds and axillary buds. Growth, anti-greediness and lateness, increase the early autumn peach, increase boll weight. Precautions 1. Dictamamine is suitable for cotton fields with good fertilizer and water conditions and strong growth potential. It is not suitable for cotton fields where the weather is dry and cannot guarantee irrigation. It cannot be used when the cotton fields are subject to pests and diseases and natural disasters. 2. The use of drugs should not be greedy and should not be used in large quantities, especially in the seedling stage, bud stage and early flowering stage. If it exceeds the amount of drug, it will cause the plants to grow slowly, the fruit branches will shrink together, and the leaves will not open. This will cause a large number of bee bells to fall off and the production will be quite severe. This situation can be sprayed with gibberellin (920) in time, which has obvious effect on relieving this symptom and restoring growth. 3. Attention should be paid to the management of fertilizers and water with the use of polycystin. With appropriateness, the application of water must not be neglected due to the darkening of the leaf color after application. 4. It is advisable to choose between 10 o'clock in the morning and 5 o'clock in the afternoon when spraying, and re-spray 1 time in case of rain after 8 hours. Shenzhen urion Technology Co., Ltd. , https://www.urionhealth.com