What if the leaves of banyan bonsai turn yellow and lose their leaves?

The banyan bonsai refers to the banyan potted plant which is molded by various means with the banyan tree as the material and for the purpose of ornamental. The vitality of the banyan tree is very strong, very good maintenance and management, but sometimes encounter some problems, such as yellowing leaves, falling leaves and so on. The following editor introduces the reasons and solutions for the yellowing and falling leaves of banyan bonsai leaves.

The yellowing of banyan bonsai leaves:

1. High humidity

Improper water does great harm to the banyan tree, too much watering or high environmental humidity will cause the root system of the banyan tree to rot and cause a large area of fallen leaves. It is difficult for banyan trees to be cultured in the north, and the humidity should be controlled in the family. Too low humidity will also cause yellow leaves.

2. the temperature difference is large.

The banyan tree is suitable to grow in an environment with small temperature difference between day and night, and the environment of wearing leather jacket and gauze at noon is not suitable for the growth of banyan tree at all. When the temperature difference is more than 10 ℃, there will be a large area of yellow leaves and black leaves.

Therefore, in the usual maintenance process, the potted plants should be placed in a ventilated and transparent position and shaded in time in summer.

3. Improper fertilization

The banyan tree likes fertilizer, but the times of fertilization or more will do harm to the growth of the banyan tree. The light leaves are yellow and the heavy ones are rotten roots. During the growth period of the banyan tree, the amount of fertilizer varies according to the season, and fertilization is reduced or not in winter. Once a month in other seasons, choose to use thin fat and water, mainly to class fees, rather light than thick.

4. Diseases and insect pests

Aphids, red spiders, scale insects and so on, when diseases and insect pests occur, plants will be damaged to varying degrees, resulting in root rot or damage, leaves will be yellow. When the leaves of the plant turn yellow, check the growth of the roots to see if there are dead roots, rotten roots, root injuries and so on. Spray chemicals in time for prevention and control.

The loss of leaves in banyan bonsai:

1. Lack of light

The banyan tree grows well in the environment with sufficient light, and the leaf color is greener if it can shade 30-50% of the sun in summer, but it is best not to shade the sun when the temperature is lower than 32 ℃, so as not to lose the leaves.

2. Improper watering

Watering too much will lead to water yellow, long-term lack of water will be dry yellow, these two situations will lead to banyan leaves, so banyan watering must adhere to the principle of not drying, watering thoroughly, the drying here refers to the dry surface of the basin soil, not the basin soil is dry thoroughly, of course, even if it is dry, it will not cause great damage to the banyan tree in a short time, because the leaves of the banyan tree are thick and small, and have a certain degree of drought tolerance.

3. Improper fertilization

Too much fertilization in banyan trees will lead to fat yellow and leaf loss, and lack of fertilizer will also make the old leaves green to yellow, so it is necessary to apply thin fertilizer frequently to avoid the application of high concentration chemical fertilizer or unfermented organic fertilizer, otherwise it will cause fertilizer damage, the light ones will lose the leaves, and the heavy ones will die.

4. Caused by insect pests

Aphids, red spiders, scale insects and so on, when diseases and insect pests occur, plants will be damaged to varying degrees, resulting in root rot or damage, leaves will be yellow. When the leaves of the plant turn yellow, check the growth of the roots to see if there are dead roots, rotten roots, root injuries and so on. Spray chemicals in time for prevention and control.

The main pests that lead to defoliation of banyan trees are red spiders and shell insects, although there are also "thrips". This kind of insect only rolls leaves to absorb juice, which is less harmful than the above two kinds, and thrips are easy to control and can only be removed and destroyed. The individual red spider is relatively small, and the general harmful part is the back of the leaf, which is caused by poor ventilation and dry air. The whole plant can be washed with water and sprayed with special mites, such as mites, acaroid mites and so on. The harmful parts of shell insects are mainly stems and petioles, with different size and color, round and oval in shape, and generally do not move, but they are harmful and need to be prevented and treated in time. They can be wiped clean with a toothbrush or dishcloth, or 0.2% solution of detergent and essential oil can be sprayed, or pesticides such as methamphetamidophos are sprayed with good results.

5. New banyan trees are planted in pots.

It may be that the banyan tree itself is not healthy enough, or it does not adapt to the environment when it is bought. Therefore, when buying, we should choose a healthy bonsai with stretched leaves, bright green, and the whole plant free of diseases and insect pests, and the basin soil should be loose, fertile and breathable, and put it in a brighter room after buying it, or in the courtyard, the temperature is between 10 °C and 30 °C and does not change much, no less than 5 degrees in winter and no more than three or five degrees in summer, and pay attention to ventilation. Often spray water to the leaves and so on.

In addition to the above cases, there is another possibility, that is, the branches or roots of the banyan tree are damaged, and the branches can decide whether to cut them according to the situation, while the roots can only find ways to heal the wound as soon as possible. fertilizing the root system before the wound is fully healed, the root system not only cannot absorb it, but the excessive fertilizer will force the water in the root cells to flow back into the substrate. Four weeks later, it is recommended to use the nutrient solution sold in the flower market. In this process, too much water will increase the probability of wound decay on the root system, the drier substrate is conducive to the growth of new roots, in order to make it have enough water and fertilizer, we can only spray more foliar water.

Finally, the editor reminds you that banyan bonsai should generally be placed in a ventilated and transparent place, and daily attention should be paid to watering, fertilization, pruning, prevention and control of diseases and insect pests, so that banyan trees have a certain degree of space humidity, otherwise the sun is not sufficient, ventilation is not smooth, there is no certain space humidity, it is easy to make the plants yellow and dry, leading to the occurrence of diseases and insect pests and even death.

Time: 2019-06-01 Click: