Cotton field, glutinous, late maturity, correct use of ethephon
In the north and south cotton areas of China, usually in the normal climate year, Spring cotton will enter the mature stage of the bolls from late August to early September. However, due to the influence of low temperature and rainy weather, the large area of ​​spring cotton is planted late, and the bud and flowering period is delayed by 7 to 10 days. In addition, the proportion of intercropping cotton fields is gradually increasing, and interplanting cotton fields are easy to be green and late. In the face of such a situation, the precautionary measures are crucial. China Pesticide Network Xiaobian gives you support for early maturity: Stainless Steel Barbecue Grate Barbecue wire Grill Grate is made of high quality 304 stainless steel, never rusting and durable. BBQ Wire mesh does not have any coating or chemical ingredients, making food safer. BBQ Grate Mesh,stainless steel wire BBQ grate,BBQ Grill Metal Mesh,stainless steel BBQ grill grate Shenzhen Lanejoy Technology Co.,LTD , https://www.szsmallcompressionspring.com
The correct use of ethephon ripening in late-maturing cotton fields is a good measure to improve production and increase income. After spraying ethephon, cotton can prematurely bleed for 7 to 10 days. The flower rate before frost increases by 10% to 20%, and the yield increases by 6.4% to 10.2%, and the income per mu increases by 30 to 50 yuan. Moreover, the ripening cotton fields are also conducive to the improvement of sowing and yielding of crops such as wheat. However, ethephon is also a "double-edged sword". If it is used improperly, it will not increase production and income, but will result in reduced production and income. Therefore, it is necessary to master the use technology of ethephon, so that it can be used correctly to achieve the desired results.
Choose the cotton field correctly. It is necessary to choose cotton fields that are late in maturity and strong in late growth, mainly in cotton fields, summer cotton and late-maturing hybrid cotton. If you choose a cotton field with more than 80% of the bolls in the 40-45 days, the application effect will be particularly good. For cotton fields with normal maturity, especially cotton fields with premature aging tendency, it is not possible to spray ethephon, otherwise it will cause premature aging of cotton plants and reduce production and reduce income. For the cotton of the fine breeding field, the ethephon can not be sprayed. If sprayed, the seed maturity will decrease and the germination rate will decrease.
Properly master the appropriate period of application. According to the pesticide network , the effect of spraying ethephon is closely related to temperature. Because ethephon must be decomposed and released at temperatures above 20 °C, it is necessary to take about 15 days after the cotton field is sprayed, and it is required to have a good application effect. According to the requirements of this principle, the spraying time in the northern cotton area of ​​China should be 20 days before the frosting period; the spraying time in the southern cotton area is mainly based on the boll period and the stalking period of the main boll, generally before the stalk is pulled. 15~20 days is appropriate. The specific spraying time must also be applied flexibly according to local conditions. In the general year, China's Huanghuai cotton area should be sprayed around October 5; the Yangtze River basin cotton area is suitable for spraying from October 15th to 20th.
Spray method and pesticide dosage. To choose a sunny day without wind or breeze, spray from 9 am to 3 pm. The amount of pesticides depends on the growth of the cotton, the temperature at that time, and the spraying period. For cotton fields that are prosperous, late in application, low in temperature, and eager to vacate, the application rate should be increased appropriately, but the application rate per acre should not exceed 200 ml; otherwise, the application amount should be appropriately reduced. In the Huanghuai area, if it is necessary to apply the medicine at the beginning of October, use 40 ml of 40% ethephon pesticide per acre, 50 kg of water, spray evenly after dilution; if applied at the end of October to the beginning of mid-August, 150 ml of the drug, 60 kg of water, diluted and sprayed. Put the diluted liquid into the sprayer, aim at the green bell on the cotton plant, and spray evenly from top to bottom, so that each cotton boll that needs ripening is sticky.
Spraying a mixture of 40% ethephon and 2% superphosphate is effective. Spraying 2% superphosphate dilution solution in the late stage of cotton has a significant effect of promoting early maturity, preventing premature aging, increasing yield and increasing income, and generally can increase yield by about 5%. Because superphosphate is an acidic chemical fertilizer, it is mixed with acidic ethephon, which not only does not affect the efficacy of ethephon, but also plays a synergistic effect on ethephon. It is worthy of promotion according to local conditions. The method is as follows: firstly, 1 kg of high-quality super-calcium phosphate fertilizer is opened with 50-60 kg of clear water, the residue is filtered off, and then the ethephon required per acre is added, and evenly mixed, it can be sprayed.
There are several issues to be aware of when using ethephon.
First, ethephon is an acidic pesticide that is easily decomposed and decomposed in the presence of alkaline substances, so it must not be mixed with alkaline pesticides. The prepared ethephon diluent should not be stored, and it should be used with the preparation.
Second, after spraying the ethephon in the cotton field, if it rains within 6 hours, it needs to be re-sprayed after the rain.
Third, before applying the medicine, the bolls should be harvested to prevent the quality of the bolls from falling.
Fourth, the ethephon stock solution is strongly acidic, has a strong stimulating effect on the human body, and must be safely protected during work. When the skin adheres to the liquid, it should be rinsed off immediately with soap and water.
Fifth, don't listen to partial beliefs and buy fake drugs. In recent years, there have been many varieties of crop ripening products on the market, most of which are fake and inferior products that have not been approved for registration by the agricultural administrative department. Cotton farmers should use regular channels to purchase ethephon pesticides from regular pesticide manufacturers .
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