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Then, in the late stage of cotton growth, how to use ethephon to receive good results?
First, we must master the use of time. Spraying ethephon on cotton should consider both the development of the cotton boll and the local temperature changes at that time. If the spray is too early, due to the high temperature, the leaves will prematurely aging and fall off, and the dryness of the cotton bolls will reduce the yield, but will not reach the ripening effect. The most suitable spraying time should be about 20 days before the local frosting period. When the maximum temperature reaches 20 °C, the spraying effect is best. Generally from late September to early October.
Second, the dosage of the drug should be appropriate. In the appropriate spraying time, use 40% of the active ingredient ethephon, 100-150 grams per acre, add 50-60 kilograms of water, spray evenly. If the temperature is high during spraying, the growth of the cotton plant is weak, and the dosage can be appropriately reduced. If the spraying time is late and the temperature is low, the cotton plant grows stronger, so the dosage can be appropriately increased.
3. At the same time of spraying ethephon, the newly grown shoots, flower buds and cotton bolls with a growth period of less than 35 days should be cut off to improve the ventilation conditions of cotton fields, concentrate nutrients, and make other cotton bolls mature early. opening of a boll.
Huaxian Agricultural Technology Center Li Dongxia
How to use ethephon in the late cotton growing period
The use of ethephon in the late stage of cotton growth has become a popular production technology that is very popular among cotton farmers. Ethephon is a ripening agent. After use, cotton bolls can be used to inject 7-40 days earlier. The amount of cotton before the frost increases by 20-30%, and the cotton gloss and fiber quality can be improved, and the economic income of cotton farmers can be increased. .
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