Scientific use of ethephon to help increase yield of late-maturing cotton

This year, the maturity of cotton in the north and south of China is delayed by 7 to 10 days compared with normal years. It is especially important to do a good job of ripening. The correct use of ethephon ripening in late-maturing cotton fields is a good measure to improve production and increase income. However, if it is not used properly, it will not increase production and income, but will result in reduced production and income. Therefore, we must correctly master the use of ethephon technology and make scientific use.

Choosing a suitable cotton field for cropping should choose a cotton field with late-maturing and late-developing cotton, and the focus is on seeding, summer-sowing cotton and late-maturing hybrid cotton. For cotton fields with more than 80% of cotton bolls in 40 to 45 days, the effect of application will be particularly good. However, for cotton fields that are normally mature and mature, especially those with premature aging trends, ethephon cannot be sprayed, otherwise the cotton plants will cause premature aging, resulting in reduced yield and reduced yield. For the cotton of the fine breeding field, it is even more difficult to spray the ethephon, which will greatly reduce the utilization value of the seed.

Properly grasp the proper period of application of the ethephon must be at a temperature above 20 °C in order to decompose and release ethylene. Therefore, after spraying in the cotton field, it is required to have a daily maximum temperature of 20 ° C or more for about 15 days to receive good results. Generally, the Huanghuai area in China should be sprayed around October 5; the cotton area of ​​the Yangtze River Basin should be sprayed from October 15th to 20th, and should be flexibly controlled according to local conditions.

Spraying method and dosage should be selected from sunny days with no wind or breeze. The temperature from 9:00 am to 3:00 pm is higher, and the spraying effect is good. 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, the application of medicine at the beginning of October, using 40% ethephon 100 ml per acre, 50 kg of water, sprayed evenly; if applied at the end of October to the beginning of mid-October, 150 ml per acre 60 kg of water, sprayed evenly after dilution. The diluted drug solution is directed to the green bell of the plant for more than 40 days, and is evenly sprayed from top to bottom, so that each cotton boll which needs ripening is covered with the liquid medicine.

Spraying 2% superphosphate dilution solution in the late stage of spraying the mixture of ethephon and 2% superphosphate has a significant effect on promoting early maturity, preventing premature aging, increasing yield and increasing income, and it is worthy of promotion according to local conditions. The method: firstly, 1 kg of high-quality superphosphate is opened with 50-60 kg of clear water, the residue is filtered off, and then the ethephon pesticide required per acre is added, and evenly mixed, an acre land can be sprayed.

Several problems need to be paid attention to when using ethephon. Ethephon is an acidic pesticide that is easily decomposed and decomposed in the presence of alkaline substances. Therefore, do not mix 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. 3. Before applying the medicine, the bolls of the bolls should be harvested to avoid the drop of the quality of the cotton. Fourth, the ethephon stock solution is strongly acidic, has a strong stimulating effect on the human body, and must be safely protected during work. Rinse immediately with soap and water when applying the liquid to the skin. 5. Don't listen to partial beliefs and cheap pictures to buy fake and inferior drugs. Cotton farmers should purchase regular manufacturers' products through formal channels.

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