How to use ripening agents for late-maturing cotton
China's Huang-Huai-Hai area and the cotton region of the Yangtze River valley, the general vintage cotton enters the boll-opening period from late August to early September. This year, due to the early and mid-term growth of cotton, the temperature is low and there are more rainy days. As a result, the seedling emergence period, budding period and flowering period of cotton are all delayed by 6 to 10 days compared with the normal years. As a result, this year's large-scale cotton has less peaches and more peaches. It is expected that the maturation period will be delayed by more than one week from the normal year. The delay in the maturity of cotton will directly affect the yield and quality of cotton. Our honey include polyflora honey, acacia honey, sunflower honey, buckwheat honey, linden honey, vitex honey etc. Our 100% Pure Honey,Mixed-Flowers Honey,Polyfloral Honey,Acacia Honey,Multi-flower Honey,Chaste Honey Easy Food (Jiaxing) Co., Ltd. , https://www.jxeasyfood.com
Years of production practice have proved that: In the late-maturing cotton field, correct application of ethephon ripening can not only make cotton bolls boil 7 to 10 days in advance but also increase the rate of pre-frost flower bloom by 9.5% to 18.8%, increase production by 6.4% to 10.2%, and increase the income by 26 acres. 40 yuan, but also conducive to the sowing of wheat and other crops and growth. However, if ethephon is used improperly, not only will it not increase production, but it will result in reduced production and income. To apply ethephon correctly, the following points must be strictly controlled:
(a) Select suitable plots for spraying. It is necessary to select the hybrid cotton varieties with lustrous late maturity, intercropping spring cotton fields and summer sowing cotton fields for spraying. It is not suitable for cotton fields with normal growth and premature aging. If spraying, it will lead to premature decline of cotton and result in reduced yield. For improved varieties of cotton fields, they cannot be applied. If they are sprayed, the germination rate of cotton seeds will be reduced.
(b) Choose the right spraying period. More than 80% of the cotton fields that are required to be sprayed are suitable for 40 to 45 days. The ethephon ripening effect is closely related to the spraying time and temperature. After ethephon sprayed at a daily maximum temperature of 20°C or above, ethylene can be decomposed and released, and a good ripening effect is obtained; if the maximum daily temperature is lower than 20°C, the spraying effect is poor. Therefore, the spraying time should be 20 days before the frost, to ensure that the daily maximum temperature of about 15 days after spraying is above 20°C. The specific time of spraying should be based on the local temperature in the year. In general, in the Huang-Huai and Haimian areas, it should be sprayed around October 5; in the Yangtze River valley, it is more appropriate to spray on October 10-15.
(C) master the spray method and dosage. To select sunny, sunny or breezy sunny days, spray from 9am to 3pm. The concentration and amount of ethephon preparation will depend on the temperature and the timing of spraying. When the temperature is higher and the spraying date is earlier, the concentration should be diluted and the dosage should be less; on the contrary, the concentration should be high, and the dosage should be increased appropriately. In the Huang-Huai-Hai area, in the beginning of October, the amount of 40% ethephon used in mu was 100 ml. In the end of October and early mid-October, 150 ml of mu was used, and 50-60 kg of fresh water was diluted and sprayed. Use a sprayer to align the cotton plant from top to bottom and evenly spray it on the bell, so that each cotton boll reaching the spray standard is covered with liquid medicine. If rain falls within 6 hours after spraying, re-injection is required.
(d) 40% ethephon can be mixed with 2% superphosphate aqueous solution. The application of 2% superphosphate solution in the later stage of cotton leaves has a good effect on increasing the boll weight and promoting early maturing. Due to superphosphate is an acidic fertilizer. If used in combination with ethephon, it will not only reduce the efficacy of ethephon, but will also increase the role of promoting the premature maturity of cotton. The method is as follows: first, 1 kg of superphosphate is opened with clear water, the residue is filtered off, then the amount of ethephon required for each mu is added, and spraying can be performed after mixing.
(e) Several issues that require attention. One is that ethephon is an acidic pesticide. In case of alkaline substances, it is easy to fail. Therefore, it cannot be mixed with alkaline pesticides, and it must be used with it. The second is to spray boll cotton bolls before spraying to avoid reducing the quality of cotton after spraying. The third is that the ethephon liquid is strongly acidic, which has a strong stimulatory effect on the human body and pays attention to safety protection during work. If the skin is covered with liquid medicine, rinse it with soap and water. The fourth is not to listen to biased propaganda and buy inferior products. In recent years, a variety of crop ripeners have appeared on the pesticide market. The vast majority of these ripening agents are compound preparations and have not been registered and approved by the agricultural administrative departments above the provincial level. They are some shoddy products that cannot be used. Some peasant friends don't understand the situation in this respect, and they listened to believe in buying. The result after the application is mostly “spend money to buy and reduce productionâ€. Therefore, the best ripening agent currently used in cotton fields is still 40% ethephon.
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