Vegetables grown in greenhouses often suffer from lack of light, temperature and humidity, and they cannot be pollinated properly. Correct application of 2,4-D, anti-falling, etc., and flowering can increase the fruit setting rate, accelerate fruit enlargement, and add output value. However, if you do not pay attention to certain details, it is easy to cause adverse effects on the plant, such as deformation. Fruit, resulting in reduced production.
How to choose anthraquinone
Both 2,4-D and anti-fallin can be used for solanaceous vegetables. Studies have shown that using 2,4-D has a higher fruit setting rate, but it has certain damage to the young shoots and young shoots of the solanaceous vegetables. Therefore, it is generally used for decorating flowers or altering flower handles; while the use of anti-fallin is very light on the young shoots of vegetables, and the dosage is appropriate and almost no damage. It can be sprayed, saves labor and labor, is safe and effective, but the ratio of fruit set is Use 2,4-D lower.
Practice has proved that the choice of which anthers should be based on the growth of the plant. For plants that are too strong or too weak, it is recommended to use 2,4-D to extract flowers. For medium-sized plants, it is recommended to use anti-fallin.
So, how do you distinguish the strength of the plant?
Generally, the plants are thick and thin, the leaves are large and thick, the leaves are dark green, and the plants with more water content in the stems and leaves are stronger; the stems are fine and thick, the leaves are small and thin, the leaves are yellowish green, and the stems are yellow. The plants with less water content in leaves have weaker growth; the stalks of the plants are uniform in thickness, the leaves are flat, and the leaves are green, indicating that the growth is moderate.
Do not spend too early
Many vegetable farmers use early flowering. As long as there are flowers, they often have poor flower bud differentiation. Even if they live, they will develop into deformed fruit later.
Suggestion: The vegetable seedling stage should be for the purpose of strong trees. Do not leave the fruit too early. For example, during the cultivation of autumn sorghum tomatoes, the top spikes can be removed to prevent the appearance of late-stage deformation fruit, and it is beneficial to strong seedlings.
About cucumber, you can start to stay in 12 leaves, from colonization to production, the best control in the high temperature season 35 to 40 days, late autumn and early spring 40 to 45 days, through the late fruit, late flowers, let more nutrients supply Roots and stems grow and cultivate strong trees. It is not advisable to use more flowers, because it will lead to a lot of "small yellow spots" on cucumber leaves (cucumber target spot disease), and there are currently no particularly effective drugs for the disease.
It is understood that the recent price of cucumber is relatively high. Some farmers have basically smashed the flowers on the plants in order to sit on the fruit. However, they did not expect to cause poor growth of the plants, and the resistance to the disease was reduced, resulting in more "small yellow spots". .
Suggestion: How much should be determined according to the growth of the plant? If the plant grows weakly, the vegetable farmers should try to minimize the flowers, first raise the stems, and do not let the nutrients supply reproductive growth, and the leaves of the plants are poorly developed, leading to multiple diseases.
The dressing should be tested first. The preparation requirements of the anthers are very strict. Some farmers prepare their own anthers. Because of the replacement of the 2,4-D products of the new manufacturers, if they are still prepared according to the original concentration, the eggplants that are pointed out will have many dead fruits, which will cause serious losses. .
Suggestion: Do not add hormone-containing foliar fertilizer when preparing anther, and change the concentration of the drug at different temperatures. However, when changing, you should first do a small area test. After the test is successful, it can be used in a large area to prevent it. huge loss.
Best time to spend
The best time to order flowers is to start when the top flower is 2 to 3 flowers open. When the flower petals of the female flower are completely opened and stretched to the bell mouth, the flower is most suitable. It is easy to cause stiff fruit too early, and it is easy to cause cracking fruit too late.
Do not order the stigma. The liquid directly affects the stigma and is prone to cracking, especially when repeating the flowering. Pay attention to the soil moisture before the flowering. If the soil in the shed is too dry, you should first sprinkle the water and then flower it to prevent the fruit from being sprinkled after the flowering.
Point flower and management
The top flower of each inflorescence is easy to develop into a deformed fruit, which should be discarded before the flower is spent. After fruit setting, the fruit growth rate is accelerated, it is necessary to release air and moisture in time, strengthen water and fertilizer management, and grasp the prevention and control of pests and diseases.
Precisely grasp the time spent
The best time for hormone treatment of flowers is only 3 days, that is, on the day of flowering and two days before opening, early treatment is easy to form a rigid fruit, and the rate of fruit set is reduced afterwards. Pick the eggplant flowers all day and turn them into purple, and handle them best.
Rational adjustment of plant growth
Plant growth is too weak, too strong will affect the hormone treatment. The pedicels of the weak plants are thin and thin, and it is easy to suffer from the hormone treatment. Plant nutrients are too strong, inhibiting reproductive growth, and will also affect the role of hormone treatment. Therefore, when planting, you should select strong seedlings, plant appropriate seedlings after planting, and control the water and fertilizer and temperature to balance nutrient growth and reproductive growth.
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