How to prevent flower and fruit fall? How to prevent persimmon trees from falling flowers and fruits

There are many reasons for eggplant flower and fruit dropping, such as insufficient light, dry soil, malnutrition, low temperature (below 15) or too high (above 35), and defective flower structure. The method of preventing flower and fruit dropping, in addition to strengthening field management for the cause, can use hormones to point flowers and protect fruits. At present, 2,4-d, compound 2,4-d (trial product), solana fruit (trial product), and anti-falling hormone dot flower and fruit preservation are mainly used in the suburban vegetable area of Hangzhou.

The first three drugs are mainly used during the low temperature period (December to April of the following year), and the anti-falling hormone can be used after May. The concentrations and methods of use of different hormones are shown in Table 1. The best time to spot flowers is when the buds are purple and ready to bud.

The concentration of the hormone dilution can be reasonably adjusted with the temperature and slightly concentrated when the temperature is low.

Table 1 The use of common hormones in eggplant spotting and fruit preservation.

Some flowers and trees often fall flowers and fruits in the process of cultivation, which greatly reduces the ornamental value of flowers and trees. At this time, it is likely to be a warning that the flowers and trees are sick, so be sure to find out the cause and treat the symptoms**. I will introduce you to how to prevent the fall of flowers and fruits.

Camellia 1, before the spring flowers and trees germinate or in the late autumn and early winter of the previous year, the flowers and trees are re-cut; For flowers and trees that bloom in early spring, they should be re-pruned after flowering.

2. Watering should be carried out according to the habits of flowers and trees, and less watering should be done during the flowering period and fruit setting period.

3. Before flowering, try to apply more phosphorus and potassium fertilizers, and nitrogen fertilizers should not be applied.

4. Cut off the over-dense branches, inner branches, and diseased branches of flowers and trees in time, so that nutrients can be supplied to fruiting branches in a centralized manner; In the flowering period and fruit-setting period of flowers and trees, flowers and fruits should be appropriately thinned to concentrate the nutrient supply and have the effect of preserving flowers and fruits.

Persimmon tree flower and fruit drop method:Strengthen fertilizer and water, reasonable pruning, flowering ring stripping, and pest control.

1. Strengthen fertilizer and water

The demand for water and nutrients during the flowering and fruiting period of persimmon trees will increase greatly, and they should be watered and fertilized in time. At this time, it is necessary to ensure that the fertilizer and water are sufficient, so as to promote better flowering, fruiting, and improve the fruit setting rate. Fertilizer can be used as compound fertilizer to supplement a variety of nutrients.

The application time can be done in May and July during the fruit expansion period, so as to increase the fruit set. If the soil is poor or lacks moisture, it is easy to lead to flower and fruit drops.

2. Reasonable pruning

Pruning should be carried out in time during the growth of the persimmon tree, especially in the summer. It is necessary to cut off overly dense branches, long branches, diseased and insect branches, reduce nutrient consumption, and make nutrients more concentrated, so as to promote better growth and fruit in the later stage. In addition, it is necessary to thin flowers and fruits in time, and the amount of fruit must be carried out according to the tree potential, and the excess flowers and young fruits should be thinned out in time.

3. Ring peeling during flowering

Persimmon trees can be peeled at any time from the beginning of flowering to the full flowering period, and the ring stripping is mainly for strong branches, strong trees or large fruiting branches. The width of the ring strip diameter is millimeters. After peeling, wrap the peel with a plastic strip to ensure that the peel is moist, which can promote faster healing.

Fourth, pest control

During the growth of persimmon trees, diseased fruits and insect fruits should be disposed of in time. About mid-June, it is necessary to spray a drug, spray Bordeaux liquid, and dyzeb zinc can prevent infection with round spot disease, horn spot and so on. It is easy to be infected with insect pests in mid-to-late May and late July, so it is necessary to spray pesticides in time to prevent it, which can also improve the fruit setting rate.

Persimmon tree maintenance method:

1. Temperature: The temperature suitable for growth is between nine degrees and twenty-three degrees, and the temperature when the fruit is ripe should be maintained at 19 degrees to 23 degrees.

2. Watering: more drought tolerant, if the annual rainfall is more than 500 ml, there is no need to give it additional irrigation, if it is a potted plant, generally watered once a week, the amount of each watering is not too much, to ensure that the soil is completely moist.

3. Fertilization: can tolerate barrenness, but does not mean that there is no need for fertilization, under normal circumstances, fertilization is done once every two weeks during the growth period, and no fertilization is required during the non-growth period, and fertilization is required once before the winter to ensure that it can be safely wintered.

4. Light: I like to live in a sunny environment, if it is an indoor maintenance plant, it can be allowed to receive all-day sunlight without human intervention. If it is an indoor maintenance plant, it needs to be maintained in a sunny place, and the light time should not be less than eight hours a day.

The amount of flowers of the persimmon tree is larger, it is impossible for all the flowers to sit on the fruit, and it is inevitable that the flowers and fruits will fall, and technical measures can only be taken to improve the fruit setting rate.

The measures to improve the fruit setting rate of persimmon trees are: 1. Strengthen soil, fertilizer and water management and pest control, especially in autumn, do a good job of leaf preservation, and improve the nutrient level of tree storage; 2. Reasonable pruning and retaining an appropriate amount of flower buds; 3. Do a good job of thinning flowers and fruits, concentrate nutrition, and promote fruit setting; 4. Do a good job of spraying boron during the flowering period to improve the fruit setting rate; 5. If the growth of the tree is too vigorous, the main trunk should be circumcised once or twice during the full flowering period, which can also improve the fruit setting rate.

One is due to the physiological disorder of the persimmon tree, and the other is caused by anthracnose or other pests and diseases such as persimmon insects.

Prevention and control methods: 1Strengthen field management, thin out overly dense branches and ineffective branches during the growth period, leave more branches on the windward side and fewer branches on the leeward side, so that the branches are reasonably distributed, the leaf-fruit ratio is coordinated, the orchard is ventilated and light-transmitting, and the relationship between reproductive growth and vegetative growth is balanced.

timely cultivation and weeding, reduce soil moisture evaporation, and reduce the air humidity of persimmon orchards; It is strictly forbidden to intercrop, increase the application of organic fertilizer, and at the same time control the amount of nitrogen fertilizer for young persimmon trees, and pay attention to the use of medium and trace elements. 2.Thinning of flower buds 3

Chemical regulation 4Disease prevention and insect treatment 5The most important thing is to apply micro-fertilizer in seedlings, supplement persimmon calcium, molybdenum, zinc, copper, boron and other nutrients, mediate the balanced absorption of persimmon's own nutrients, promote flowering and fruiting, healthy growth, lush flowers, will not occur the phenomenon of falling flowers and fruits, so that persimmon yield increases, effectively increase the ability to resist diseases and pests.

Is the eggplant falling flowers and fruits serious? As long as one move, a single tree will burst full of fruit in the later stage, and the effect will be remarkable in just a few days.

My persimmon tree has bloomed for 2 consecutive years, and it has all fallen, and there is no one left, and this year is like this again, the harvest is out, and the persimmon stalk on the tree is still thicker normally, I don't know how, can the author tell me? Thank you.

Dear, hello, I am happy to answer your questions, I have found for you: grape anti-flower and fruit drop can use growth regulators, such as jasmine acid, ethephon, etc., these growth regulators can promote the growth and development of plants, enhance stress resistance, and reduce the phenomenon of flower and fruit fall. However, it is necessary to follow the method of use and dosage when using growth regulators to avoid negative effects on the plants.

At the same time, it is important to choose the right varieties and good management practices to improve the yield and quality of the grapes. Thank you for your patience, I am happy to answer your questions, if you are satisfied, give a like and support it, I wish you a happy life<>

Reasonable fertilization can reduce fig fruit drop to a certain extent. The branches of figs grow intermittently, and flowering and fruiting are carried out at the same time, so we should pay attention to reasonable fertilization, apply some nitrogen fertilizer in the juvenile period of the fruit tree to promote the growth of branches and leaves, do not need to fertilize too much, as long as it can make the figs grow healthily. Fruit trees that are three or four years old do not need to apply organic fertilizer, and some urea can be applied before the fig fruit expands rapidly.

Figs are a drought-tolerant plant, its root system is very strong, but it is not waterlogged, so we must pay attention to drainage when planting fig trees. Because the leaves of fig trees are very large, the transpiration ability of leaf water is also very strong, so it is necessary to pay attention to providing sufficient water for figs in summer, and to water them in time in the dry season or after fertilization, and to water the appropriate amount of frozen water before wintering in winter.

Reasonable watering and reasonable drainage can make the fig tree healthier and stronger, and it is less likely to drop fruit, in addition, in the rainy season and when the fruit is about to ripen, we should pay attention to reasonable drainage, too much water will increase the weight of figs, and it is easier to drop fruits.

Pests and diseases can weaken the fig tree, affecting the nutrient absorption of the fig tree, and malnourished fig trees are prone to fruit drop. Therefore, we should always observe the fig tree to see if there are any insect pests, once the insect pest occurs, it is necessary to deal with it immediately, use relevant insecticides, and kill the pests in time according to the instructions to prevent and control fig fruit drop.

When there is a sudden drop in temperature, the ripening time of figs will be delayed, which will cause figs to fall fruit. In this case, we can spray the relevant auxin to promote the ripening of the fig fruit at a reasonable time, which can not only prevent the fig from falling, but also improve the quality of the fig fruit.

1. The reason why cherry tomatoes fall into flowers and fruits.

1. Cloudy and rainy day, insufficient light.

2. Improper cultivation management. In addition, when planting, the seedlings are too long, the plant injury is too heavy, the watering is uneven, the soil is dry and wet, the water imbalance during the flowering period, the formation of separation at the flower stalk, and the lack of water and fertilizer will cause malnutrition and flower drop.

2. Preventive measures.

1. Comprehensive agricultural control measures, such as cultivating strong seedlings, planting in a timely manner, and avoiding low temperatures; Prune and prune in time to prevent the plant from growing; Timely topdressing and watering to prevent and control diseases, pests and mechanical damage.

2. The application of plant growth regulators is commonly used in tomatolen, 2,4-d. The appropriate concentration of tomato is 25-50 micrograms, and 2,4-d is 15-20 micrograms, which should be applied to the flower peduncle separation or the stigma of the flower during the flowering stage.

Strengthen field management, make the branches reasonably distributed, strengthen ventilation, reduce the air humidity of persimmon orchards, strictly prohibit interplanting, increase organic fertilizer, mediate the balanced absorption of persimmon nutrients, flowering and promoting fruit, and healthy growth.

Some pesticides should be sprayed, and there are special pesticides that can enhance the fruit drop rate of fruits.

In order to avoid the occurrence of flower and fruit drop due to the unsuitable temperature and environment of tomatoes, the temperature can be controlled at 22-28 degrees during the day and about 18-20 degrees at night during the flowering and fruit period, the maximum temperature during the day shall not exceed 35 degrees, the minimum temperature shall not be lower than 22 degrees (25-28 degrees is appropriate), the maximum temperature at night shall not exceed 22 degrees, the minimum temperature shall not be lower than 15 degrees (about 18-20 degrees is appropriate), and the temperature difference between day and night shall be mastered at about 8-10 degrees.

(1) Pay attention to autumn fertilization, especially to apply sufficient base fertilizer, and skillfully use nitrogen fertilizer.

Winter topdressing of grapes is an important measure to ensure the nutrient storage of the tree, keep the tree healthy, ensure the flowering and fruit setting in spring, and reduce physiological fruit drop. Therefore, according to the law of grape fertilizer demand, the amount of fertilizer required for different yields, the amount of fertilizer required should be applied in September and October. The autumn application of basal fertilizer should be combined with fertilization soil fertility to increase soil organic matter, and fermented and rotted farmhouse fertilizer or high-quality commercial organic fertilizer should be the main fertilizer.

If a small amount of nitrogen fertilizer is required, it should be combined with autumn basal fertilizer. The grapes bloom 20 to 50 days later than the large cherry, apricot, peach, apple, pear and other fruit trees, and the grapes only bloom and set fruit when the branches are at their peak. Therefore, if the basal fertilizer applied to grapes in autumn is insufficient, top dressing must be carried out in spring, and a small amount of nitrogen fertilizer must be added, which can still play a good role in improving fruit setting rate and reducing physiological fruit drop.

After the grape flowering, that is, June and August is the high temperature and rainy season, the top dressing should be mainly high potassium and low nitrogen fertilizer, and the application of urea or high nitrogen fertilizer should be controlled to prevent the growth of branches, resulting in physiological fruit drop, affecting fruit expansion and flower bud formation.

2) Foliar spraying fertilizer to supplement nutrients.

Before grape germination, 500 times of Pliden fish protein was added to 2% urea; After germination and flowering, combined with spraying neutral pesticides, 500 600 times of Pliden fish protein and urea were sprayed many times. Boron-deficient and calcium-deficient vineyards, with borax calcium nitrate, can supplement the nutrients stored in the tree, promote the improvement of fruit setting rate, and reduce the physiological fruit drop of grapes.

3) Scientific watering to prevent physiological fruit drop caused by water.

Grapes should be watered for drought protection and should be watered before bud break and before flowering. Within 30-40 days of entering the flowering period and the nutrient transition period after flowering, attention should be paid to water control. If the drought is severe without watering before flowering, you can only water a small amount of water, not a large amount of water.

If there is heavy watering or heavy rain within 30 to 40 days after flowering, it will cause the branches to grow and compete for nutrients, and there will be serious physiological fruit drop, which is also an important reason for grape fruit drop.

4) Reduce consumption and try to save nutrients stored in the tree.

Grape management should be done at all times to remove the grape whiskers. After the fruit ear is extracted, 7 8 large leaves are left in front of the ear, and the topping is plucked, the secondary panicle is removed, and the tip of the ear is pinched (1 3 1 4). As a result, 7 8 large leaves were left in front of the new branch and fruit spike, and only two secondary tips were left at the top after topping, and the lower secondary tips were erased in time.

In the flowering period, fruit setting can be improved by artificial or bee pollination, and fruit thinning can be carried out in time 7 to 10 days after flowering. Through the above-mentioned measures such as flower thinning, grape topping, wiping of secondary shoots, removal of secondary ears, pinching of ear tips and early fruit thinning, the consumption of stored nutrients can be reduced, and the physiological fruit drop of grapes can be reduced.