Vegetables grown in greenhouses often suffer from insufficient light, temperature and humidity, and cannot be pollinated properly. Proper application of 2,4-D, anti-fallin, etc., can increase the fruit set rate, accelerate fruit enlargement, increase yield, but if you do not pay attention to certain details, it is easy to adversely affect the plant, such as the appearance of deformed fruit, Lead to production cuts, etc.

How to choose anthers?

1

Both 2,4-D and anti-fallin can be used for solanaceous vegetables. Studies have shown that the application of 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 scenting or smearing the flower handle; while the anti-falling agent is very light on the tissue of the young shoots of the vegetables, and the amount of the tissue is almost harmless, and it can be sprayed, saves labor and troubles, is safe and effective, but the fruit set ratio is 2 , 4-D is lower.

Practice has proved that the choice of which anthers should be determined according to the growth of the plants. For plants that are too strong or too weak, it is recommended to use 2,4-D to decorate flowers. For medium-sized plants, it is recommended to use anti-fallin.

So how do you distinguish the strength of the plant? The plants on the stems of 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, and the leaves are small. The plants with thin, yellow-green leaves and less water content in stems and leaves are weaker; the culms of the plants are uniform in thickness, the leaves are flat, and the leaves are green, indicating that the growth is moderate.

2

蘸花 practical experience

1. It is not advisable to plant a lot of tomatoes in the early stage. It is very early in flower growers. As long as there are flowers, the first flowering buds are poorly differentiated. Even if they are lived, they will develop into deformed fruits in the later stage.

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 oak, the first spike can be removed to avoid the appearance of deformed fruit in the later stage, and it is beneficial to strong seedlings. For cucumbers, it is possible to leave melons above 12 leaves. From colonization to production, it is best to control 35 to 40 days in the hot season, 40 to 45 days in the late autumn and early spring, and to provide more nutrients through the late leaves and late flowers. And stems and leaves grow, cultivate strong trees.

2. The flower is not suitable. Recently, the master of the vegetable farmer Wang found that the "small yellow spot" on the cucumber leaf is particularly serious (that is, the cucumber target spot disease), because there is no particularly effective drug for the treatment of the disease, and the spread is very rapid. In the conversation with Master Wang, I learned that the price of cucumber is high recently. In order to have more fruit, the flowers on the plant are basically paralyzed, but I did not expect the plant to grow poorly, and the resistance to the disease is reduced, resulting in a rapid "small yellow spot". spread.

Suggestion: How much should be judged according to the growth of the plant? If the plant grows weakly, the vegetable farmers should try to reduce the amount of melons, first raise the stems, and do not let the nutrients supply reproductive growth, which causes the leaves of the plants to develop poorly, leading to multiple diseases.

3. Change the medicine first. The preparation of the anthers is very important. 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 appear out have many dead fruits, causing serious losses. Wang Shifu, who grows cucumbers, said that the clams of his clams were very serious recently. Later, he recalled that a new foliar fertilizer was added to the anthers, and the foliar fertilizer contained hormones, which caused melons. The suede is severe.

Suggestion: Do not add hormone-containing foliar fertilizer to the anthers, and change the concentration of the drug at different temperatures. However, you should first do a small-area experiment when changing. Only after the experiment is successful, can it be applied in a large area to avoid causing huge loss.

The flower should be timely. When the first spike flower opens 2 to 3 flowers, the flower can be started. When the flower petals of the female flower are fully unfolded, the flower is most suitable when it is elongated to the bell mouth shape. It is easy to form a stiff fruit too early, and it is easy to cause cracking fruit too late.

Be cautious in your operation. If the medicine drops fall on the twigs, young leaves and growth points when the flowers are spotted, it is prone to phytotoxicity, resulting in atrophy or necrosis of the affected parts.

Do not order the stigma. The liquid directly stimulates the stigma to be prone to cracking, especially when the repeated flowering is severe, it almost causes no harvest.

Pay attention to soil moisture. If the soil in the shed is too dry, you should first water the flowers and then avoid the watering caused by the flowers.

Point flower and management combined. The first flower of each inflorescence is prone to malformation and should be removed before the flowering. 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 do a good job in pest control.

Grasp the principle of "combination of speed and slowness". That is, the time when the female flower is immersed in the anther is not too long, one can be used; when the female flower is taken out from the anther, do not rush to squat, but should play the female flower or stick the female flower with the bottle of the anther The drops on the medicine are "recycled" into the bottle.

If the medicinal bottle contains up to 1/3 of the medicinal bottle, do not squeeze the squeezing or tilting the vial to complete the sputum. Refill the sputum and then operate. Otherwise, the liquid will be spilled to other parts of the plant due to improper operation, causing phytotoxicity. If the flower is finished, the remaining liquid can be transferred to a small container for further use.

In order to avoid repeated flowering, it is best to add a small amount of red pigment to the anthers to distinguish them by color, and also to add flavonoids to prevent gray mold and sclerotinia.

Accurately master the time spent on the flower. Hormone treatment of flowers only 3 days, that is, the day of flowering and two days before the opening, the early treatment is easy to form a rigid fruit, and the rate of fruit set after treatment is reduced. It is best to choose the day when the eggplant flowers are all purple and open.

Accurately grasp the temperature of the greenhouse when the flower is cut. In high temperature conditions, silk flowers are prone to deformed fruit, and low temperature treatment is easy to produce stiff fruit. Generally, the temperature of silk flower should be between 15 °C and 25 °C.

Reasonably adjust the growth of plants. Plant growth is too weak, too strong will affect the hormone treatment effect. The peduncles of the weak plants are thin and small, and it is easy to produce the fruit by hormone treatment. Plant vegetative growth is too strong, inhibiting reproductive growth, and will also affect the hormone treatment effect. Therefore, when planting, you should choose strong seedlings, plant appropriate seedlings after slowing down the seedlings, control the water and fertilizer and temperature, and balance the vegetative growth and reproductive growth.