How does pomegranate protect flowers and fruits?

When planting pomegranate trees, especially in flowering period, attention should be paid to protecting flowers and fruits. The key is to master good technical methods. What are the specific methods to protect flowers and fruits? Let's take a look at what I have carefully recommended to you, hoping to help you.

Techniques for flower and fruit protection of pomegranate

Method 1, foliar spraying fertilizer:

Spraying 0.5% urea solution, 1% calcium superphosphate extract, 0.3% potassium dihydrogen phosphate solution or 0.3% borax solution on pomegranate leaves at the initial flowering stage can increase the fruit setting rate by 7%~ 10%.

Method 2, thinning flowers and fruits:

Degraded flowers not only can't bear fruit normally, but also consume a lot of nutrients in the tree. Therefore, after pomegranate buds appear, most bell-shaped flowers should be removed to reduce nutrient consumption if they can be distinguished from bell-shaped flowers.

After fruit setting, small fruit, deformed fruit, late fruit and string fruit should be eliminated in time. The amount of fruit thinning depends on the potential of the tree. Generally, fruits will be scattered when they grow. When the fruit is few, it will only be sparse, not normal fruit. Old and weak trees are rare, and strong trees are rare.

Method 3, artificial pollination:

When the self-pollination rate of pomegranate is very low, the flowering period is low and rainy, and there are few pollinators, artificial pollination is needed. Artificial pollination can improve the fruit setting rate of pomegranate by 9.6%.

The method of artificial pollination is: in the case of few trees and small pollination, you can directly pollinate tubular flowers with newly opened bell flowers, or you can collect pollen from the normal flowers of pollinated trees with a brush, and then pollinate the stigma of the newly opened normal flowers of the main varieties, and the pollinated flowers can be marked by removing petals.

The amount of pollination depends on the tree, the crown is large and the tree is strong. Young trees and flourishing trees should pollinate more to promote more fruits. Trees with small crown, weak tree vigor and old trees can pollinate less to restore tree vigor and improve fruit quality.

Method 4, timely control pests and diseases:

The main disease that harms pomegranate fruit is dry rot, and July is the peak. It can be controlled by spraying 1: 1: 160 bordeaux solution or 40% carbendazim gel suspension 800 times. The main pests are peach fruit borer and peach fruit borer, both of which feed on larvae, affecting fruit yield and quality.

To control peach moth, 50% phoxim or 50% phoxim EC 1000 times solution can be sprayed during the adult occurrence and spawning peak period, or 50% phoxim EC 1 part or 90% trichlorfon crystal 100 part fine soil can be added to make medicinal mud to block sepals.

The control of peach moth can be achieved by spraying 300 times of 50% phoxim EC on the ground under the tree crown during the emergence period from June to July, and then hoeing the tree tray shallowly, or spraying 3000 times of 2.5% fenvalerate or 20% fenvalerate during the adult growth period.

Reasons why pomegranate trees don't bear fruit

First of all, insufficient light can lead to:

Pomegranate is a light-loving plant. During its vegetative growth and flowering, insufficient light or rainy weather will cause pomegranate trees to bear no fruit. Insufficient light will cause plants to grow relatively vigorously, which is not conducive to the accumulation of nutrients in the body, thus affecting reproductive growth, so they will fall off immediately after flowering; If it encounters continuous rainy weather during flowering, the pistil will not be fertilized normally, resulting in its flowering and fruitlessness.

Second, the reason of unreasonable fertilization:

Pomegranate is very sensitive to water and nitrogen fertilizer at flowering stage. Many people think that pomegranate needs more water and nutrients during flowering, so a lot of fertilizer and water are applied, which leads to excessive vegetative growth of pomegranate and a large number of flowers and fruits falling.

Third, the reasons of pomegranate flower organ degradation:

The development of flower organs and fruit growth are largely controlled by nutritional status. Insufficient nutrition makes the flower organs of fruit trees stunted, forming degenerated flowers and deformed flowers, which will fall off after flowering.

Fourth, pomegranate branches are too dense:

Pomegranate grows fast and can be picked twice a year. Dense and straight branches not only affect ventilation and light transmission, but also compete with flowers and fruits, affect fruit setting and reduce quality. At the same time, pomegranate is prone to pests and diseases.

Causes of pomegranate fruit cracking

1. variety: pomegranate varieties under different cultivation conditions have fruit cracking phenomenon. Generally, the mid-mature varieties in rainy season are large in fruit shape, thin and smooth in skin, and easy to crack in red and white skin. Such as Yicheng red pomegranate, Tian Hongdan and pink sweet pomegranate in Lintong, Shaanxi.

2. Soil fertilizer: cohesive soil, black soil, acid clay and clay in low-lying areas have high water retention and poor air permeability, which not only leads to poor fruit quality, but also is easy to crack. Excessive application of nitrogen fertilizer or inorganic fertilizer leads to the lack of trace elements such as calcium, potassium and boron, serious soil erosion, soil hardening and easy fruit cracking.

3. Moisture: When the soil humidity is too high or the humidity changes too much, such as high temperature, drought, sudden rainstorm or even rainy day, the fruit will absorb too much water and crack easily. Excessive air humidity can also lead to fruit cracking.

4. Temperature: There is a certain correlation between temperature and humidity. Fruit expands rapidly in high temperature and high humidity environment, and it is easy to crack when it suddenly cools down.

5. Illumination: improper pruning during the growth period, partial exposure of the fruit, large temperature difference between day and night or easy fruit cracking after rain, and fruit cracking is often sunny.

6. Growth period: Fruit cracking generally occurs in the late stage and mature stage of fruit expansion, and it is more serious when it rains or cools down.

7. Harvesting: Harvesting at low temperature in the morning or after rain, over-harvesting at maturity and collision during harvesting and transportation are all easy to cause fruit cracking. Pomegranate fruit cracking is often caused by a variety of comprehensive factors, especially in the middle and late stage of pomegranate expansion, material accumulation and transformation are going on, seeds expand rapidly, plasma cells in seeds have large vacuoles, loose structure, strong water absorption, large expansion rate, pericarp gradually thinning, and pericarp cells are small and dense; The expansion rate is small, and the fibrosis is not enough at this time, and the texture is crisp and tender. If it is in the hot and dry season, heavy rain, continuous rain or cooling will lead to fruit cracking. Variety is the genetic factor and the decisive factor of pomegranate fruit cracking. Mature pomegranate is easy to crack, and the more cracked pomegranate seeds are, the more delicious they are. All kinds of birds compete to peck, making pomegranate offspring blossom everywhere, which is also the result of natural selection.