Cotton chemical control can shape cotton into an ideal rod shape, so that it can thrive, thereby reducing disease, increasing cotton yield, and improving cotton quality and value. This chemical regulation has always been respected by cotton farmers. The China Pesticide Network Xiaobian will explain to you several techniques for the use of good pharmaceutical agents, as follows:
First, the ketamine. At present, the application of ketamine in cotton chemical control is extensive and the effect is also ideal. It can reduce the plant height of cotton, reduce the number of fruit branches, promote the transfer of photosynthesis to reproductive growth, reduce the shedding of cotton bolls, increase the number of bolls, and coordinate the contradiction between individual development and population development. Cotton is applied to ketamine 4 times in one life. The first time is used in the bud period. The use of 0.51 grams of water to 20 kilograms of water is beneficial to control and promote buds. The second time in the initial flowering period, the use of 1.51 grams of water to 30 kilograms of water can prevent the ringing. For the third time in the flowering and boll period, 30 grams of water is used for 30 kilograms of water, and the top of the crown and the top of the fruit section are sprayed to help shape the good plant type. In the fourth time, in the later stage, if there is a phenomenon of “running high”, it can be re-controlled. The mu is covered with 34 grams to help control the late buds, shorten the upper fruit section, prevent the increase of no effect, and the axillary buds grow.
Second, ethephon. Ethephon is mainly used in all kinds of late-maturing cotton fields and cotton fields that need to be plucked early. It is not suitable for cotton fields with normal boll opening and low yield. The pesticide network recommends that the temperature should be higher than 20 degrees after spraying. Only when the temperature is higher than 20 degrees, the ethylene can be decomposed and released, and the bell of the upper cotton boll is carried out for more than 40 days. The northern cotton area is sprayed about 20 days before the frosting period, generally 40 per mu. % Ethephon water agent 300~800 times liquid 60kg, use ethephon ripening, must pay attention to the application of the liquid directly attached to the bell body, minimize the interception by the blade, can not be mixed with alkaline pesticides, add 0.2% neutral when used The washing powder is a wetting agent, the effect is better, and the seed field cannot be used.
Third, chitin. It can be used in the whole growth period of cotton. It can enhance the stress resistance and disease resistance of cotton by adopting 600~800 times liquid leaf spray, especially for cotton seedling disease, verticillium wilt and blight. effect.
Tetra-triacontanol. Soaking seeds with 0.1 mg/kg of triacontanol for 8 hours can increase the germination potential and germination rate of the seeds. Spraying 0.1 mg/kg of triacontanol solution at the end of the flowering and flowering stages can reduce the buds.
Fifth, help the prime. In the Shenglei period and the initial flowering stage, 25% of the perimu is used to promote 5 ml of water to 40 kg of water, and 10 ml of each of the flowers is sprayed once during the flowering period, which can effectively control the length of the cotton and reduce the occurrence of buds and bells and disease.
The chemical control pesticides are currently available in a wide variety of varieties. The correct application techniques should be adopted according to different pharmaceuticals to achieve better results. The above are the application techniques of the four pharmaceuticals for your reference.

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