What are the effects of ethrel? How to use it?

What are the effects of ethrel? How to use it? Also ask experienced netizens to help introduce the use of ethephon in daily life to accelerate the ripening of bananas, tomatoes, persimmons and other fruits, but what are the specific functions of ethephon? How to use it effectively? There are many netizens who do not know much about them, so the farming network has sorted out the function and usage of ethephon, which are listed in detail below for netizens' reference. The role of ethephon: ethephon belongs to organophosphorus broad-spectrum and low-toxic plant growth regulators, which can promote plant ripening. Ethephon mainly enters the plant through crop leaves, bark, fruits and seeds, and then spreads to the active parts, releasing ethylene. It can promote fruit ripening and coloring, promote leaf and fruit shedding, dwarf plants, change the ratio of female and male flowers, induce crop male sterility and so on. When ethephon is sprayed on crops, it will be quickly absorbed by crops. Because the PH value of plant cell fluid is more than 4, ethephon gradually releases ethylene after entering plant tissue, and the release rate of ethephon increases with the increase of PH and temperature, which plays a role in promoting fruit ripening, inhibiting crop growth and promoting adventitious roots. Ethephon can be used in a variety of crops, such as rice, corn, Jinqiu pear, grape, peach, tomato, cucumber, melon, cotton and other crops. The use of ethephon: 1, used for cotton ripening: if the stamina of cotton, autumn peaches often use ethephon to accelerate ripening. The application of ethephon to cotton requires that most of the cotton bolls in the cotton field have a boll age of more than 45 days, and the highest temperature should be above 20 degrees. For cotton ripening, 40% ethephon is mainly used to dilute 300 to 500 times the liquid, which is used in the morning or when the temperature is high. In general, after the application of ethephon, cotton can accelerate boll cracking, reduce post-frost flowers, effectively improve cotton quality, and thus increase cotton yield. 2. Used to accelerate the ripening of tomatoes: generally, there are two methods for ripening tomatoes with ethephon. One is to soak the fruits after harvest, and for the tomatoes that have come a long way but are not yet ripe, put them into ethephon solution with a concentration of 0.001% to 0.002%. After a few days of stacking, the tomato can turn red and ripe. The second is to coat the fruit on the tomato tree and apply 0.002%-0.004% ethephon solution on the tomato fruit during the "color conversion period". The ripening tomato by this method is similar to the natural ripe fruit. 3. Used for banana ripening: banana ripening with ethephon is generally impregnated with 0.0005% ethephon solution or sprayed on 78 mature bananas. If the temperature is too high, ventilation and heat dissipation should be taken to prevent bananas from thinning their stalks. Heating is needed when the temperature is below 20 degrees Celsius. Bananas treated with ethephon can quickly soften and turn yellow, astringency disappears, starch decreases and sugar content increases. 4. It is used to accelerate the fall of jujube, Hawthorn, olive, ginkgo and other fruits: jujube: from the white ripening period to the crisp ripening period, or it is customary to spray ethephon 7-8 days before harvest. If it is used for processing jujube, the application time can be advanced appropriately, and the concentration of ethephon sprayed should be 0.0002%-0.0003%. Because the pericarp of jujube is very thin, if it is a raw food variety, it is not suitable to drop with ethephon. Hawthorn: generally spray 0.0005% ethephon solution with 0.0005% ethephon concentration 7-10 days before normal Hawthorn harvest. Olives: generally spray 0.0003% ethephon solution when the olives are nearly ripe. The above fruits can fall off when the big branches are shaken 3-4 days after spraying. 5. Used to cultivate short and strong rice seedlings: when the continuous cropping late rice seedlings grow to the five or six leaf stage, the seedlings are sprayed with 0.001% ethephon solution of 50 kg per mu, which can make the seedlings short and strong, save effort in pulling seedlings, and return green quickly after transplanting. Early tillering, early heading and other advantages. 6. Used to induce cucumber flowers: generally, when cucumber seedlings have 1 or 3 true leaves, ethephon solution with a concentration of 0.0001% and 0.0002% is sprayed only once. If you need to spray the second time, you can spray it every other week after the first application. The use of ethephon in the early stage of flower bud differentiation can change flowering habits, induce female flowers and less male flowers, so as to increase melon fruiting and increase melon number. Ethephon points for attention: 1, ethephon diluted solution, due to the decrease of acidity, resulting in poor stability, so ethephon should be used with. 2. The best temperature for the use of ethephon is above 20 degrees. If the temperature is lower than 20 degrees, the efficacy will decrease. 3. Because ethephon is an acidic agent, it should be decomposed into ethylene when it encounters alkali, so ethephon cannot be mixed with alkaline substances. 4. Ethephon has irritating effect on human skin and eyes, so it is necessary to pay attention to the safety of human body when using it. What is the harm of pesticides? What should I pay attention to when using plant regulators?