Tomato drop, Fruit drop problem, production can be used spray, anti-dropping factor (tomato spirit) method to solve. But in the application must pay attention to the following four points: First, to grasp the nature of the drug 2,4-D compared with the anti-dropping agent, 2,4-D fast drug effect, flower protection and fruit protection effect is good, but the concentration is more difficult to grasp, It is easy to produce teratogenic fruit; anti-dropping agents are safer and less prone to malformation, but the efficacy is slower. Second, the application period should be accurate to spend the flowers to the top yellow, not fully open or flowers bell-shaped when the best. However, it is generally believed that the effect from 3 days before flowering to 2 days after flowering is effective. Premature application can easily cause burnout, but it is not effective when it is too late to be a lantern. Usually, it is better to sip the flowers in the sunny afternoon, and the concentration of the drug solution changes due to condensation on the surface of the stalks in the morning, which is prone to phytotoxicity. Third, the concentration should be suitable for the use of anti-dropping agent concentration is generally 20ppm ~ 40ppm, the effect is too low concentration is not significant, too high prone to deformed fruit, empty fruit. The concentration should also change with the change of the outside temperature. In general, the low limit is taken when the temperature is high, and the high limit is taken when the temperature is low. Before the application, it is best to carry out the pod flower test: Select a few normal flowers. If the ovary of the pods begins to swell in 4 to 5 days, it means that the concentration is appropriate. Premature enlargement indicates that the concentration is too large, and late enlargement indicates that the concentration is too small. Fourth, the method should be properly prevented from spraying the liquid to the young leaves or growing points, otherwise it will make the leaves into strips. Once phytotoxicity occurs, the supply of fertilizer and water should be strengthened and the phytotoxicity can be appropriately reduced. To avoid repeated flowering, it is best to add a little pigment as a marker in the liquid.
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