How to use ethephon in the later stage of cotton?

How to use ethephon in the later stage of cotton? Please introduce the use of ethephon in the late growth stage of cotton, which has become a very popular technology for increasing production among cotton farmers. Ethephon is a ripening agent. Cotton bolls can be used to open bolls 7-10 days earlier after use, and the amount of cotton picked before frost can be increased by 20%. Ethephon can improve the gloss and fiber quality of cotton, and increase the economic income of cotton farmers. So, in the later stage of cotton growth, how to use ethephon to get good results? First, it is necessary to master the time of use. Spraying ethylene on cotton should take into account not only the development of cotton bolls, but also the local temperature changes at that time. If spraying too early, because the temperature is on the high side, it will make the leaves senescence and fall off prematurely, and the cotton bolls will dry up and reduce the yield, but can not achieve the role of ripening. The most suitable spraying time should be about 20 days before the local dry frost period, and the effect of timely spraying should be the best when the highest temperature reaches more than 20 ℃. It is usually from late September to early October. Second, the dosage of the medicine should be appropriate. In the appropriate spraying time, ethephon with 40% active ingredient, 100-150 grams per mu, plus 50-60 kilograms of water, can be evenly sprayed. If the spraying temperature is high and the growth of cotton plant is weak, the dosage can be reduced appropriately; if the spraying time is late, the temperature is low, and the growth of cotton plant is strong, the dosage can be increased appropriately. Third, while spraying ethrel, the new shoots, flower buds and cotton bolls with a growing period of less than 35 days should be cut off, so as to improve the ventilation conditions of cotton fields, concentrate nutrients, and make other cotton bolls mature and open bolls early. Click to get more cotton planting technology click to get more regulator use technology click to get more pesticide use technology