Latest Precautions for Using Plant Hormones on Vegetables

In vegetable production, if plant hormones are used properly, they can bring higher yields and better quality to vegetables, and bring higher returns to farmers. However, in the process of using hormones, once they are not used properly, various physiological problems will appear, which not only fail to improve yield and quality, but instead reduce yield and quality. So what should be noted when using plant hormones on vegetables? Let's learn about it together.

1. Pay attention to the timing of use

Plant hormones generally have a more obvious effect when used at a certain growth stage, and using them too early or too late will not produce the best effect. For example, paclobutrazol can control excessive vegetative growth of the plant at the young fruit stage of eggplant, but if it is applied at the full fruit stage, it will affect the yield. In addition, when spraying hormones, attention should also be paid to the time. Generally, on a sunny morning or when the temperature is between 20-25 degrees, the effect of the hormone is good. If it is used on cloudy days or in low-temperature and high-temperature weather, its effect will be affected.

2. Pay attention to the dosage and frequency of use

The use of plant hormones should also be determined according to the specific growth conditions of the plant. Generally, it should not be used continuously or at too high a hormone concentration, as this will cause adverse effects. If a hormone is used once but does not achieve the expected effect, it can be used in small amounts multiple times as appropriate, to avoid hormone poisoning caused by frequent use over many times.

3. Pay attention to the method and part of use

Plant hormones can be applied by methods such as spraying, smearing, flower dipping, melon soaking, and root drenching to different parts of vegetables, so as to achieve different effects. For example, when 2,4-D is applied to young zucchini fruit, smearing it on the fruit stalk and flower stigma can promote fruit set. When using plant hormones, try to use them after determining the target part, and do not let them touch other parts, so as to avoid hormone poisoning. For example, when using 2,4-D to smear flowers, getting the solution on leaves or stems can very easily cause phytotoxicity, resulting in leaf drop.

4. Conduct a small-area test first

Because plant hormones are affected by factors such as temperature, climate, plant growth vigor, and different dosages during use, sometimes the effects of use in the same area and for the same crop will differ. Therefore, before using hormones on a large area, a small-area test must be carried out. After confirming the effect of the hormone, use it scientifically and reasonably, so as to avoid large-scale poisoning caused by unreasonable use. This has a relatively large impact on yield, and the economic losses caused are also relatively serious.

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