1. The concentration used 2,4-D is generally 10ppm-20ppm, the use concentration of the anti-fallin is generally 20ppm-40ppm, the lower limit of the concentration is taken at high temperature, and the upper limit of concentration is taken at low temperature. Before use, the flowering test should be carried out first, and several normal flowers should be smashed first. If the ovary begins to expand after 4 to 5 days, it indicates that the concentration is suitable; if the ovary begins to expand within 3 days, the concentration is too high; There is no swelling in the ovary, indicating that the concentration is too low.
2. It is best to use the time when the flower is yellow when the flower top is not completely open or the flower is flared. It is easy to cause burnt flowers too early, and it will not work until the flowers are lanterns too late. In the sunny afternoon, the flowers are better. In the morning, the scent of the flowers will change due to the condensation on the surface of the plants, causing phytotoxicity.
3. Treat the treated area with a brush to lightly spread the solution on the flower stalk or peduncle, or soak the whole inflorescence in the solution. Do not sprinkle the solution on the young leaves or growth points of the plant, otherwise the leaves will be It becomes a strip-shaped fern leaf and grows slowly, especially 2,4-D, which is most susceptible to phytotoxicity.
4. Fertilizer and water supply using hormones and flowers can prevent falling flowers and promote fruit hypertrophy, but there is no fertilizer effect. Therefore, after using hormones, it is necessary to scientifically and reasonably topdress and strengthen management. In addition, after the first ear fruit is used with the fruit hormone, the other ear fruits should be used. Otherwise, the fruit below absorbs a lot of nutrients, and the above-mentioned ear does not receive the necessary nutrients, and the phenomenon of falling flowers and falling fruits will occur.
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