Ethylene to promote cooked cotton boll
When it comes to ethephon, it is not unfamiliar to many farmers. Ethephon is a high-quality and efficient plant growth regulator that promotes fruit ripening. It is very good in promoting cotton boll maturity. Let's introduce it with Xiaobian.
In case of alkaline substances, it will quickly decompose and fail. Therefore, ethephon is strictly prohibited from being mixed with alkaline pesticides, and it cannot be diluted with alkaline water such as pit pond water. Ethylene can release ethylene gas at a pH of 3.8 or higher. After dilution with water, the pH value will change, so it should be used with it, otherwise it will affect the efficacy.
It is necessary to choose cotton fields and summer cotton fields that are greedy, late-maturing, late-developing, and intercropping. It is not suitable for cotton fields with normal growth and development and premature aging, otherwise it will cause cotton to wither and lead to premature wilting. For the breeding of good varieties, it is generally not used, otherwise it will lead to a decrease in the germination rate of cotton.
Generally, the cotton field is used with 100-150 grams of stock solution plus 60 kilograms of water, and is formulated into a 0.15% to 0.25% liquid spray. For cotton fields that are heavily greedy or eager to vacate, the concentration can be increased, but generally does not exceed 0.3%.
Ethylene must be decomposed and released in the environment above 20 ° C to release ethylene, dry high temperature weather is conducive to improve the efficacy. Therefore, it is generally mastered that 20 days before the frost, 80% cotton hangs for 40 to 45 days, and when the maximum temperature is above 20 °C, it is sprayed. If it rains within 12 hours after spraying, it should be sprayed once. The specific time, Huanghuaihai area around October 5.
More pesticide knowledge, please pay attention to China Pesticide Network
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