Correct use of cotton ripener

     When cotton matures late, it has an impact on yield and subsequent wheat sowing. Proper use of ripening agent can not only cause bolls to boll in advance 7 to 10 days, but the flowering rate before frost increases by 9 . 5 % ~ 15 . 2 %, increased production 5 . 1 % ~ 8 . 9 %, and is good for wheat. After years of experimentation and production practice, there are two scientific and mature cotton ripening techniques, namely, ethephon ripening and gram-free ripening technology, which is more practical.  


Ethephon ripening ethylene is commonly known as ripening agent. After being absorbed by cotton plants, it releases ethylene, which increases the ethylene content in the cotton boll, enhances the activity of the peroxide -- enzyme, and destroys the synthesis of auxin. The photosynthetic products in the cotton leaves are transported out in a short period of time, thereby promoting the maturation of the cotton boll. The correct use of ethephon should master the following points: First, the spraying time, the normal year is generally at the end of September and the beginning of October ; the second is the highest temperature on the day of spraying is above 20 °C , preferably for several days, the temperature is above 20 °C ; Thirdly, it is 80% of the cotton plant Boll of cotton to more than 40 days; Fourth master amount per acre with 40% ethephon 100 ~ 200 ml of water, 40 to 50 kg uniform spraying. Note that ethephon cannot be applied to seed cotton fields.  


The effect of no trace of ripening and gram-free ripening has the following characteristics: rapid defoliation, high defoliation rate; concentrated vomiting, high flowering rate before frost. The correct use of gram without trace, one must master the ripening period, generally in late September and early October , the cotton boll period is applied over 45 days; the second is to choose the appropriate dose, 50 grams per gram is not suitable; pay close attention to weather conditions, one day after spraying Gramoxone heavy rain should be sprayed, 7 to 10 days boll opening peak of the rainy weather, even if treatment should be delayed after application to prevent the decline in the quality of cotton; four to pouring enough water, and uniformly spraying pesticide per acre of water preferably of 40 to 50 kg.

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