- Aug 20, 2018 -
What is the relationship between the use of Ethephon and environmental conditions?
The release of ethylene from ethephon solution is not only closely related to pH value, but also related to temperature, light and humidity.
The decomposition of ethephon accelerates with increasing temperature. According to the test, ethephon can be completely decomposed and released ethylene after being placed in boiling water for 40 minutes under alkaline conditions.
The effect of Ethephon on crops is related to the temperature at that time. Generally, it is necessary to keep the appropriate temperature for a certain period of time after treatment to produce a significant effect, and its effect increases with increasing temperature within a certain temperature range. For example, ethephon accelerated ripening of tomato, banana, cotton boll and other fruits, the temperature at 25 C ripening effect is very good; 20 ~ 25 ℃ also has a certain effect, below 20 ℃, the effect of ripening fruit is very poor. This is because ethylene needs to have suitable temperature conditions in the process of participating in physiological and biochemical activities of plants. At the same time, within a certain temperature range, the amount of ethephon entering the plant increases with the increase of temperature. In addition, higher temperature could accelerate the movement of ethephon in the plant. Therefore, suitable temperature conditions can improve the application effect of ethephon.
A certain light intensity can promote the absorption and utilization of ethephon by plants. Under light, the photosynthesis and transpiration of plants are enhanced, which is beneficial to the conduction of ethephon with the transport of organic matter. At the same time, the stomata of the leaves are open, which facilitates the entry of ethephon into the leaves. Therefore, ethephon should be applied on sunny days. However, if the light is too strong, the ethephon solution sprayed on the foliage will be easy to dry, which will affect the absorption of ethephon in the leaves. Therefore, it is necessary to avoid spraying under the hot light of noon in summer.
The humidity of the air will also affect the absorption of ethephon by plants. Higher humidity of the liquid is not easy to dry, easy to let ethephone into the plant, low humidity of the liquid quickly drying in the leaves, will affect the amount of ethephone into the plant.
Spraying ethephon is better with breeze, if the wind is large, the liquid medicine is scattered with the wind, and the utilization efficiency is low. Therefore, it is necessary to select a small wind sunday to spray .
There should be no rain within 6 hours after spraying, so as to prevent ethephon from being washed away by rain and affecting the efficacy.