Tomato use hormones to pay attention

In order to prevent tomatoes from falling, the use of more fruit hormones in the production of 2,4-D and anti-dropping hormone two. Farmers should pay particular attention to the following during use: 1. Use concentration: 2,4-D use concentration, generally 10-20PPm; use concentration of anti-dropping agent, generally 20-40PPm. Take the lower limit of concentration at high temperature and the upper limit of concentration at low temperature. Before the use, we should first carry out the pod flower test and select a few normal flowers. If the ovaries begin to swell after 4-5 days, it means that the concentration is appropriate. If it swells within 3 days, it means the concentration is too high, if within a week. No ovary enlargement was observed, indicating that the concentration was too low. 2, the use of time: when the flowers to the top of the flower to see the yellow is not fully open or the flower was "sudden bell mouth" like the best. It is easy to cause burnout prematurely and it does not work too late to become a “lantern”. In the sunny afternoon, it is better to sip the flowers, and the morning squid changes the liquid concentration due to condensation on the surface of the plants, resulting in phytotoxicity. 3. Treatment site: Use a brush to lightly coat the prepared solution on the pedicel or pedicel, or dip the whole inflorescence in the solution. Do not spill the solution on the young leaves or growing points of the plant when processing. Otherwise, it will The leaves become bar-shaped fern leaves, which grow slowly, especially 2,4-D, and are most susceptible to phytotoxicity. 4. Fertilizer supply: Application of hormones to decorate flowers can prevent flowering and promote fruit hypertrophy, but it has no fertilizer effect. Moreover, due to the accelerated fruit hypertrophy, it requires a lot of nutrition. Therefore, after using hormones, it is necessary to scientifically and reasonably top-dress and strengthen management. In addition, the use of fruit hormones in the first fruit, the other fruit should be used, otherwise, the following fruit to absorb large amounts of nutrients, the top of the fruit can not get the necessary nutrients, resulting in serious flowering and fruit drop.

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