It is a kind of growth hormone, which can promote growth, prevent the formation of separation layer, and promote its fruit setting is also a kind of plant growth regulator. It can induce parthenocarpy. After application, it is safer than 2, 4-D and not easy to produce drug damage. It can be absorbed by roots, flowers and fruits, and its biological activity lasts for a long time. Jufeng grape is more sensitive to it, not suitable for foliar spraying.
The concentration of 4-chlorophenoxyacetic acid sodium: 5-25ppm is appropriate, and the appropriate amount of trace elements or 0.1% potassium dihydrogen phosphate is better
Use method: commonly known as harvest spirit, its role is to increase fruit setting rate, accelerate the development of young fruit, generally used in tomatoes, eggplant, pepper, cucumber, watermelon and other fruits and vegetables.
(1) In the flowering period of eggplant with a concentration of 25-30 mg/l of anti-fall liquid spray, two consecutive times, each interval of 1 week.
(2) For tomatoes in the flower half, with 25-30 mg/l of anti-fall liquid spray once. Pepper spray once with 15-25 mg/l of 4-chlorophenoxyacetic acid sodiumin solution during flowering.
(3) the watermelon in the flowering period with 20 mg/l of the anti-fall hormone liquid spray 1 to 2 times, the intermediate interval.
(4) For Chinese cabbage, 3-15 days before harvest with 25-35 mg/l of Chinese cabbage anti-fall liquid spray in the afternoon on a sunny day, can effectively prevent Chinese cabbage from falling off during storage, and has the effect of preservation.
When spraying anti-fall elements, pay attention to: first, spray flowers must be fixed (only spray flowers and can not spray stems, leaves), it is recommended to use household spray bottle with liquid spray flowers, spray time should be selected sunny morning or evening, if in high temperature, hot sun or rainy day spray is easy to produce drug damage. Second, when using the pure product of 4-chlorophenoxyacetic acid sodium, it is also necessary to dissolve it with alcohol or high-concentration soju first, and then add water to the required concentration.
Post time: Jan-02-2025