Ethephon
1. Chinese common name: Ethephon
2. English common name: 2-Chloroethyl-phosphonic; Ethephon; CEPA; Bromefor; Cepha; Etherel; Florel
3. Chemical name: 2-chloroethylphosphonic acid
4. Trade name: ethylene phosphorus; vinyl spirit;
5. Chemical structure
6. Physical and chemical properties: pure product is white needle crystal, melting point 74~75 °C, industrial product is light yellow viscous liquid, soluble in water, soluble in ethanol, difficult to dissolve in benzene and dichloroethane. It is stable in an acidic medium, decomposes in an alkaline medium, and emits ethylene.
7. Toxicity: low toxicity
8. Category: Plant Growth Promoters
9. Main dosage form: 60% crude oil, 40% water agent, 40% alcohol agent
10. Functional characteristics: Ethephon is easily absorbed by plants, gradually releases ethylene in the plant, enhances the peroxidase activity of the plant, thereby reducing the apical dominance, increasing the effective tillering, making the plants transform and preventing lodging, and also making plant males. Infertility, early results, promote early fruit ripening, ripening; also has the effect of defoliating cotton and tea tree buds; it can also be used as fruit ripener. This product can be used for ripening crops such as rice, wheat, sorghum, cotton, tobacco, tomato, cucumber, apple, citrus, pear, hawthorn, etc. It can also be used to control the growth of rice seedlings and increase tillering.
11. Using technology
(1) Adjust growth, improve quality, increase production
Rice is sprayed once with 250~500mg/L of ethephon solution in the four or six-leaf stage, which can reduce the height of seedlings by about 10%. It can effectively prevent seedlings from being damaged after planting, promote rooting early, return to green quickly, and divide early. More, prevent plant lodging in the late stage, the effect of increasing production is significant, that is, regulate growth and increase production.
Spraying plants with 6~7.5g/667m2 of ethephon solution can promote root development, play a dwarf stalk, enhance ventilation and light transmission in the field, promote early maturity, and increase yield, ie regulate growth and increase yield.
The rubber tree is sprayed with 2000~3000mg/L of ethephon solution to prevent defoliation and avoid powdery mildew; coating with 10% ethephon solution can reduce the viscosity of the latex, prevent the milk duct from clogging, and accelerate the gelation. Speed, increase production.
Sorghum sprays the leaf surface with 250mg/L of ethephon solution, which can shorten the internode, reduce the plant height by about 20cm, and enhance the lodging resistance, which is anti-falling and increasing yield.
Soybean sprayed with 300~500mg/L of ethephon solution at 9~12 tablets, which can make the plant short and strong, promote fruit ripening and increase yield, that is, control, anti-fall and increase yield.
The lacquer tree is coated with 1% to 6% of the ethephon solution to promote the ability to paint.
Benzoin is coated with 10% ethephon solution to increase yield.
(2) ripening and familiar
Tomatoes are coated with fruit, fruit or spray with 1000~4000mg/L of ethephon solution to make the fruit ripen early, but it does not affect the quality.
Cotton is sprayed with 500~800mg/L of ethephon solution, which can ripen but not affect the quality. Spraying the whole plant with 1600~4000mg/L ethephon solution can make the cotton defoliate and harvest early.
Bananas with 800~1000mg/L of ethephon solution can make the fruit ripen early, but it does not affect the quality.
Persimmons are sprayed or dipped in water with 300~800mg/L of ethephon solution, which can be removed and ripened without affecting quality.
Spraying plants with 500~700mg/L of tobacco in dry tobacco and 1000~2000mg/L of late tobacco can ripen, increase yield and improve quality.
Cantaloupe is sprayed with 500mg/L of ethephon solution, which can be ripened without affecting the quality of the melon.
Pears can be planted with 200~400mg/L of ethephon solution to reduce the fruit and fruit; spraying with 25~250mg/L of ethephon solution can make the fruit mature early, but it does not affect the quality.
Jujube trees are sprayed with 200~300mg/L of ethephon solution to make the fruit mature early, but it does not affect the quality.
Hawthorn sprays the plant with 500~600mg/L of ethephon solution, which can be ripened and drenched.
å–·æ´’ Spray the plant with 1500mg/L ethephon solution to prevent cracking; spray the plant with 500~1500mg/L ethephon solution to ripen.
Plums spray the plants with 50~100mg/L of ethephon solution to improve fruit quality and ripening.
Cherry is digested with 200~300mg/L of ethephon solution, which can be ripened.
Pineapple is injected with 25~75mg/L of ethephon solution, which can be artificially germinated; each plant is filled with 30~50mL250~500mg/L of ethephon solution to control the flowering result period; in addition, the fruit maturity is 70%. Above, the use of ethephon solution can be ripened without affecting quality and yield.
Fruit plum is sprayed with 250~350mg/L ethephon solution, which can be ripened.
Ginkgo biloba is sprayed with 500~700mg/L of ethephon solution to promote fruit shedding and improve harvesting efficiency.
Pleurotus ostreatus is sprayed with 500mg/L ethephon solution for 3 times to promote bud, ripening and increase yield.
Flammulina velutipes can be sprayed with 500mg/L of ethephon solution to promote early mushrooming and mushrooming.
(3) Adjust flowering period, increase the proportion of bisexual flowers, increase production and increase income
Peony sprays plants with 500mg/L of ethephon solution to promote flowering.
Spraying plants with 200mg/L ethephon solution can inhibit flower bud formation and delay flowering.
Mango is sprayed with 100~200mg/L of ethephon solution to promote flowering.
The apricot tree is sprayed with 200~200mg/L of ethephon solution to delay flowering and increase yield.
Narcissus is watered with 1000~2000mg/L of ethephon solution to promote flowering.
The florets sprayed with 75mg/L of ethephon solution to promote flowering.
Peanut is sprayed with 2000mg/L of ethephon solution 25 days after flowering to control flowering, which can make the plant tall and straight, tough, and the leaves are dark.
Cucumber sprayed with 50mg/L of ethephon solution when 4 true leaves were stretched, which can induce the production of female flowers and inhibit the formation of male flowers, which is conducive to increasing yield.
Melon spraying plants with 100mg/L of ethephon solution can increase the proportion of amphoteric flowers.
When the zucchini 3 leaves stage is 500mg/L and 3 pieces of true leaves are sprayed with 150mg/L of ethephon solution, it can inhibit the formation of male flowers and increase the number of female flowers, ie ripening and increasing yield.
(4) Increase branching and promote growth
Carnation sprayed with the 500mg/L ethephon solution for 4 times to increase branching and promote growth.
The rose is sprayed with 500mg/L of ethephon solution to promote the growth of the side branches and promote growth.
(5) Improve stress resistance
Geranium sprays the base of the seedlings and spray with 250~300mg/L of ethephon solution to promote growth and dwarf plants.
The tea tree is sprayed with 800~1000mg/L of ethephon solution, which can remove flowers, increase fruit and enhance cold resistance.
(6) Others
Soaking seeds with 1000mg/L of ethephon solution can relieve seed dormancy and increase germination rate.
Freesia can soak the bulbs with 5mg/L of ethephon solution to regulate bulb development.
The lychee tree sprays the stems and leaves with 50~66.7mg/L of ethephon solution to kill the winter shoots.
The longan is sprayed with 150~300mg/L of ethephon solution to control the flower and prevent the shoot.
When the peach blossoming period is 300mg/L and the flowering is 8d, the plant is sprayed with 200mg/L of ethephon solution to thin the flowers and fruit.
12. Notes
(1) It should be sprayed when the weather is fine. The temperature is 20~30°C, and the temperature is lower than 20°C. It is necessary to increase the dosage. In case of rain within 5 hours after application, it should be refilled.
(2) Ethephon cannot be mixed with alkaline pesticides, nor can it be diluted with alkaline water. The liquid should be used now. In order to improve the efficacy, 0.1% neutral detergent powder was added to the aqueous solution as a surfactant.
(3) Strictly control the spraying concentration of the liquid medicine. If it is used for more than 800mg/kg of hawthorn, it will cause phytotoxicity, causing the leaves to fall off. Below 600mg/kg, it should not achieve the purpose of ripening. At the same time, attention should be paid to crop varieties, plant growth, etc., and the concentration should be determined according to local conditions.
(4) When the ethephon is applied in the late stage of the crop, it should be harvested in time to avoid over-cooking. Some fruits still have a ripening effect after harvesting, and should be taken into account when harvesting.
(5) Some crops should not be used for ethephon. For example, ethephon can not be used after picking watermelon. Because ethephon produces a faint process, it will cause pesticide residues. After eating, it will cause diarrhea, and watermelon can not increase after red Sugar.
(6) Ethephon should not be applied to crops with dry weather, insufficient soil fertility and short plant growth, so as not to affect the normal growth of plants. For the fields with strong growth and fertility, the concentration can be appropriately increased.
(7) Ethephon has a corrosive effect on the metal container. When reacted with the metal, it will release hydrogen gas. When it reacts with alkali, it will produce flammable and explosive gas. It should be highly valued when cleaning, inspecting and selecting the container.
(8) Ethephon stock solution is a strong acid substance, which has irritating and corrosive effects on skin and mucous membranes. Avoid contact with skin and eyes when using.
(Yuege Fertilizer Network comprehensive finishing, please indicate the source, please contact 13203809264 for details)
This article URL: Liu Gong said regulators | Ethylene effect and applicable crops
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