Peach tree fruit drop prevention measures, peach tree fruit drop what to do

How to prevent peach trees from falling flowers and fruits? The main reason is that pollinator trees are not configured when the garden is not configured or pollinators are not properly configured.

Buckle the shed to heat up too early: In order to make the product go to market early, some fruit farmers prematurely buckle the shed to heat up without meeting the cooling needs of peach trees, resulting in uneven budding and flowering of peach trees, low fruit setting rate or dead buds falling off. Improper temperature regulation:

First, the heating rate is too fast after buckling the shed, resulting in abnormal growth of the tree; Second, the temperature is too high and the ground temperature is too low, which causes the growth of the aboveground and underground parts of the tree body to be out of balance; Third, the day temperature is too high and the night temperature is too low, and the tree body is difficult to adapt to large temperature changes, which is easy to cause the flowers to freeze and cause poor fruit set; Fourth, the humidity in the shed is too high, which is not conducive to the spread of pollen, resulting in poor pollination and fertilization, causing flower and fruit drop. Poor soil: excessive soil moisture and poor aeration can easily cause hypoxia in the root system, inhibit the absorption of nutrients and water, and cause a large number of flowers and fruits.

Improper application of pesticides: such as the application of unrotted chicken manure or ammonium bicarbonate and other chemical fertilizers, the release of a large amount of ammonia, so that the peach tree is damaged, resulting in flower and fruit drop, or the application of inferior chemical fertilizers, causing root damage.

The solution attaches importance to pollination: rational allocation of pollination trees, artificial pollination or bee release during the flowering period, especially for varieties with low self-flowering and seed setting rate, 2 3 times with chicken feather duster rolling during the flowering period or 1 2 boxes of bees or 120 150 wall bees in each shed. Accurately grasp the heating time of the buckle shed:

The appropriate heating time of the canopy must be determined according to the local climatic conditions and the cooling capacity of the peach tree variety. Adjust the temperature in the shed: the temperature is not easy to rise too fast after buckling the shed, generally the temperature rises 1 2 per day, and the daytime temperature rises to 20 for about 20 days.

While maintaining a suitable temperature, the ground temperature should not be ignored. Ways to increase ground temperature: First, hoe in time after watering and cover the mulch film as soon as possible; Second, do not water after buckling the shed to the flowering period; the third is to open the curtain in time after sunrise in the morning; Fourth, increase the application of organic fertilizer.

Control the humidity in the shed: control the relative humidity of the air at 50% during the flowering period, and strengthen ventilation on the premise of maintaining the temperature in the facility. It can also be sprinkled with quicklime, plant ash, cinder, etc. in the shed to absorb moisture.

The relative humidity of the soil is kept at 60% 70%, and the water is poured once before the shed, and the soil is hoeed after the ground is dry, and then covered with mulch. Spraying should be cautious: choose high-efficiency, low-toxicity, pollution-free high-quality pesticides, and strictly grasp the concentration of pesticides, the concentration is slightly lower than that in the open field, especially the agents containing hormones.

Fertilization should be scientific: in addition to selecting high-quality fertilizers, it is necessary to focus on fully decomposed organic fertilizers and minimize the application of chemical fertilizers. When fertilizing, it is necessary to open a ditch or dig a hole to apply it, and cover the soil, and it is not suitable to spread on the ground.

The application of chemical fertilizers should be mastered in small quantities, multiple times, and evenly dispersed.

Peach fruit drop control measures: high concentration of ethephon, organophosphorus pesticides in the water ammonia thion, methamidophos, trichlorfon, dichlorvos, monocrotophos before and after the flowering period often cause apples, peaches and some vegetables to fall flowers and fruits.

After flowering, phosphorus and potassium fertilizers should be added to top dressing to reduce early fruit drop. Apply 150 grams of urea, 200-250 grams of superphosphate, 250 grams of potassium chloride or 10-15 kg of plant ash per fruiting tree.

With the expansion of fruit and the development of seed embryos, it is necessary to enhance the absorption of nutrients, and in the nuclear hardening stage, the manure of decaying and livestock is used to apply available phosphorus and potassium.

fertilizer, or compound fertilizer is more effective. For peach trees with large crowns, the amount of fertilizer should be increased as appropriate.

During the first fruit thinning, the thin, damaged, and pest-resistant fruits should be removed, and the second fruit thinning should be controlled at about 12,000 per mu. 3. Post-management: After fruit thinning, phosphorus and potassium fertilizer should be applied to the peach tree.

1. Fruit thinning time

The fruit thinning time of peach trees is between two weeks after flowering and hard core period, which is generally carried out twice, the first time is carried out after the peach tree is slowly buried and the flowers are withered 20 days later, and the second fruit thinning is carried out after the flowers wither for 5-6 weeks, which is conducive to improving the fruit setting rate of peach trees.

2. Fruit thinning method

When thinning the peach tree for the first time, it is necessary to remove the fruit that grows thin and deformed, and suffers from pests and diseases on the branch, and then remove the liquid deficiency fruit on the fruit branch and the leafless fruit branch, and retain the high-quality fruit with correct shape and larger size, and when thinning the fruit for the second time, it is necessary to remove too many fruits to ensure that the amount of fruit left per mu is about 12,000.

3. Post-management

After the fruit thinning is completed, it is necessary to increase the application of phosphorus fertilizer and potassium fertilizer for the peach tree, which is conducive to the growth and development of the fruit, and the peach tree is prone to root cancer, peach flow gum disease, peach aphid and other pests and diseases during the fruiting period.

Generally continue to copy 2-3 weeks, the weight of the fruit drop varies from variety to variety, but also affected by the cultivation conditions, according to the survey, the peach fruit with more fruit drop often has the phenomenon of cracking the core, the main reason for the cracking of the core is: the tree is vigorous, excess nutrition or less fruit set; The tree is weak, the new shoots stop growing, or the fruit is thinned too much; Climatic factors, such as heavy rains after a long period of drought, heavy soil clay and poor drainage, hinder root development, and can also aggravate fruit drop.

The main measures to prevent the physiological fruit drop of peach trees are: the initial fruit tree should balance the tree potential, do not make the growth too vigorous, the tree strength should be lightly pruned, and the fruit thinning should be properly controlled, so that the long branches are more fruity, and the long branches are cut off 1 2-1 3 after harvesting, and the tree potential should be enhanced for the adult weak trees. In the early stage of hard core (late May to early June), if the new shoots stop growing, indicating that the tree is too weak, flower thinning, fruit thinning, and fertilizer and water management should be taken to enhance the tree strength.

However, it is necessary not to thin too many fruits, and to prevent the growth of secondary shoots from being too vigorous. After fruit picking, the nutrients of the tree should be increased, and deep ploughing should be carried out in autumn and winter, combined with the application of organic fertilizer. During the hard-core period, it is necessary to prevent rapid changes in climatic conditions, and appropriate irrigation should be carried out during droughts, and drainage should be paid attention to when there is a lot of rain.

1. The branches of peach trees grow rapidly and the fruit development period is short, so fertilization should be timely and reasonable. Fertilization in spring mainly refers to the pre-germination appearance.

The fertilization time should not exceed the end of February, and it is better to apply it early in advance. The types of fertilizers are chemical ammonium carbonate, phosphate fertilizer, potassium fertilizer and organic household fertilizer. Fertilization method:

Under the canopy, close to the root distribution area, dig 2-3 fertilization pits, fully mix organic fertilizer with nitrogen, phosphorus and potassium fertilizers and apply them, and cover the soil in time after application. In case of drought and rain before germination, light manure should be irrigated to resist drought and drainage. 2. Timely use of Kao No. 1 to prevent physiological fruit drop, which is an important problem in the growth of peach trees, especially in rainy conditions.

There are three stages of physiological fruit drop in peach trees: the first stage occurs after flowering, which is mainly caused by incomplete development of pistil and pollen and poor pollination; The second stage is in the young fruit stage, which is mainly caused by poor nutrition of the tree; The third stage is the hard core stage, which is mainly caused by the competition between the new shoots and the fruit for nutrients and water. It is also necessary to pay attention to factors such as pest and disease damage and soil water.

When is the fruit-setting period of peach trees?

In extremely frozen years, it is easy to cause damage to the trunk cortex, and in severe cases, it will cause dead branches and dead trees. Whitening the trunk is the most effective means of anti-freezing. It can greatly reduce the drastic changes in cortical temperature and protect cortical cells from damage. to achieve safe wintering.

Before the arrival of extremely cold weather, you can spray JFN raw powder 1000 times, which can prevent frostbite of fruiting branches, if you do not do a good job of prevention, spray JFN raw powder 1000 times immediately after freezing can make the branches recover quickly.

If a large wound (more than 1 cm) is caused during winter shearing, it is necessary to apply a healing agent to protect it from frostbite and the resulting glue flow.

In the cold winter in northern China, for seedlings planted from the south to the north, newly transplanted seedlings, two-year flowers cultivated in the open field, and non-cold-tolerant perennial flowers, it is necessary to prevent cold to avoid low temperature hazards. According to the many years of work experience of Zhongwei Kuaihuo Forest experts, we now introduce several common seedling cold protection measures in northern areas.

1. Adapt measures to local conditions and suitable trees: according to local climatic conditions, plant trees and flowers with strong cold resistance.

2. Strengthen cultivation management and enhance the cold resistance of seedlings: through reasonable watering of seedlings, scientific fertilization (such as less nitrogen fertilizer in autumn to control the growth of seedlings), spraying antifreeze and other measures to promote the growth of seedlings and enhance their own cold resistance.

3. Watering and sealing permeable and green water: after watering permeable water before the soil freezes, after the soil contains more water, the surface ground temperature will not drop too low or too fast in severe winter, and the surface ground temperature will rise slowly in spring. Watering back to green water is generally carried out in early spring, due to the large temperature difference between day and night in early spring, timely watering back green water can make the surface temperature difference between day and night relatively small, to avoid spring cold damage to plant roots.

Fourth, set up wind barriers: for newly planted or introduced tree species, there are main wind sides or plant periphery with plastic cloth to make wind barriers to prevent cold, and some varieties also need to be covered with grass curtains (such as the south, northward migration of large-leaved boxwood can generally be adapted after 1 to 2 years).

5. Trunk protection: It is common to wrap and paint white trunks. 1.

Trunk wrapping: Mostly carried out before winter, the trunk of newly planted trees or cold-tolerant varieties is wound or wrapped with straw rope or sack sheets, etc., and the height can be up to about 2 meters. 2.

Whitening of the trunk: Generally carried out in autumn, the trunk is whitened with the whitening agent of the happy forest, and the white reflects the sunlight to reduce the absorption of solar radiation heat by the trunk, thereby reducing the temperature difference between day and night of the trunk and preventing the bark from freezing. In addition, this method also has a certain effect on the prevention of pests.

Sixth, mulching: mostly used for the garden open field flowers, before frost, on the ground covered with hay, straw mats, horse manure, etc., this method is both economic and good, the application is very common. In addition, it can also be covered with materials such as plastic film, but it needs to have certain economic conditions.

7. Smoke method: often used in the open field flowers in the nursery, generally carried out in the night of a sunny day, light the haystack, use smoke to reduce the loss of soil heat, the effect of this method is not obvious when the temperature is too low, and cause a certain amount of pollution to the environment, so this kind of cold-proof measures should be avoided as much as possible in the place close to the urban area.

8. Pile soil to prevent cold: For some root-based flowers or flower shrubs, pile up a 30 to 40 cm high mound around their rhizomes after watering frozen water (the mound should be solid).

9. Spray antifreeze agent to enhance the water retention and frost resistance of plants.

Peach trees are easy to grow vigorously and flow gum, which affects the growth of fruit trees and the fruiting rate of the next year. It can be used to promote Kao No. 3 to completely improve the flow of gum disease, control the vigorous growth of the strip, and improve the fruit setting rate. It is mainly used to bandage the main trunk and main branches of young trees and cultivate soil at the root neck. Measures such as whitening the trunk of mature trees and cultivating soil at the root neck can prevent sun burning, frost damage, and pests and diseases.

Trunk bandaging and root neck soiling. It is mostly used for young trees. Locally, from the beginning to the end of October.

Materials can be used straw, waste agricultural film, straw rope and other materials, the trunk, the big branches and branches are tightly wrapped, the focus is on the south side of the trunk and the big branches, after bandaging, a small mound is cultivated at the base of the trunk to protect the root neck and strengthen the bandage. Remove cold-proof materials in mid-to-late April of the following year. The trunk is painted white.

It is mostly used for mature fruit trees. The whitening of the trunk can slow down the drastic temperature change caused by direct sunlight, prevent the peach bark from freezing and the separation of the wood, and at the same time kill some insect eggs and germs, and can also prevent livestock from eating the trunk. The method is to use a brush dipped in whitening agent along the trunk and main branches from top to bottom, and apply it from the inside to the outside.

Whitening formula, 10 kg of quicklime plus 60 kg of water, plus an appropriate amount of stone sulfur mixture and a small amount of soybean flour or soybean oil. Clearing the garden, no matter what kind of orchard, should be thoroughly cleaned after winter, burning dead branches, fallen leaves, weeds or piling up fertilizer, and combined with winter pruning, remove dead buds, dead fruits, paper bags, etc., and completely remove the habitat of overwintering pests and diseases. Scraping, it is best to do it at the beginning of winter, scraping the bark to master the small tree and the weak tree to scrape lightly, only scrape off the dead and warped bark; The big tree is scraped again, scraped until the cortex is slightly exposed yellow-green, and then the general tree lotion is applied to the lesions, so that the lesions quickly dry up and fall off, and remove the source of bacteria.

Thermal insulation and anti-freezing, pay attention to reducing frost damage in winter, and eliminate overwintering diseases and insects under the bark and in the cracks. After the garden is cleared, the whole garden is sprayed with tree guards, disinfection and sterilization, heat preservation and anti-freezing, and the tree body is protected from wintering. Pesticide control, peach trees are best to spray targeted pesticides and new high-lipid film twice after pruning and before and after germination.

The peach tree is a relatively hardy fruit tree. In the usual winter, the peach tree is frost-proof, mainly to coat the surface of the root with a layer of coating, which can not only prevent freezing and keep warm, but also prevent diseases and insects. The specific operation of the peach tree antifreeze coating is to use stone sulfur mixture and lime powder, press 1:

1 ratio, plus 1 2% edible salt, 1 2% engine oil or diesel, add an appropriate amount of water according to the actual operation, stir into a thin paste, easy to apply to the degree. Generally, the main trunk of the peach tree, after applying a layer of coating, can put on a layer of anti-freezing and cold-proof, thermal and warm coat for the peach tree, which can not only prevent freezing and cold, but also prevent diseases and insects.

The main purpose of the peach tree is to protect the main trunk well, and the branches do not need to be protected, even in the cold north, the adult peach tree can be more resistant to severe cold, and will not suffer from frost damage. If special bad weather hits, you can use straw, dead weeds, waste plastic film, etc., bundle them into small handfuls, and hang them on the branches of trees, which can play a certain role in anti-freezing and warmth, and resist wind and cold.

In short, the peach tree is a relatively cold-tolerant fruit tree, in winter, the use of stone sulfur mixture and lime mixture to apply a protective layer to the trunk of the peach tree, it can play a role in freezing and cold protection, and can kill insects and diseases.