Ethephon, also known as a plant growth regulator, has gained increasing attention and application in agricultural practices in recent years. Below are eight key applications of ethephon that have shown promising results in various crops:
**1. Application of Ethephon on Cotton**
Ethephon is commonly used to improve the yield and quality of cotton. Applying 100–150 ml of ethephon per acre mixed with 30 kg of water during the late-maturing stage, approximately 20 days before the first frost, can significantly increase the number of pre-frost flowers by about 70%. This treatment is especially effective when applied to unopened bolls.
**2. Application of Ethephon on Corn**
At the end of the corn growing season, spraying 50 ml of 40% ethephon solution per acre mixed with 15 kg of water can lead to several benefits. It reduces plant height by around 25 cm, thickens the stem, increases the double ear rate, improves lodging resistance, and enhances overall maturity. Additionally, it reduces tassel length and promotes earlier maturation by 3–5 days.
**3. Application of Ethephon on Persimmon**
To remove bitterness from persimmons, a lyophilized aqueous solution of 750–1000 ml/L is used. After spraying or picking, the fruit is kept at 22–26°C for 2–4 days to effectively eliminate astringency.
**4. Application of Ethephon on Tomato**
During the color-changing stage, tomatoes can be dipped in a 2000–4000 ml/L ethephon solution for one minute and then placed in a 20–25°C environment. They will ripen and turn red within 2–3 days. If most fruits are nearly mature, spraying 1000 ml/L ethephon on the plant can help achieve uniform ripening for easier harvesting.
**5. Application of Ethephon on Watermelon**
When watermelons reach a certain growth stage, applying 200–300 ml/L of ethephon solution to the surface using a cloth can speed up maturation by 5–7 days. This also increases soluble solids in the juice by 1–3%, enhancing sweetness and sugar content.
**6. Application of Ethephon on Cucumber**
Spraying 200–300 ml/L of ethephon solution during the second leaf stage of cucumber, once every other week, helps increase the female flower ratio and ultimately boosts cucumber yield.
**7. Application of Ethephon on Zucchini**
Applying 100–200 ml/L of ethephon solution during the 2–3 leaf stage of zucchini can significantly improve the setting rate of female flowers, leading to better fruit production.
**8. Application of Ethephon on Flowers (e.g., Chrysanthemum)**
Spraying chrysanthemum leaves with 1000 ml/L of ethephon solution helps control internode elongation and delays flower bud development, resulting in more compact and aesthetically pleasing plants.
When using ethephon, it's essential to apply it carefully—avoid over-spraying and ensure even coverage. Following these guidelines ensures optimal results while minimizing potential damage to the plants.
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