The reason for the yellowing of the leaves of the rubber tree, what if the rubber tree loses its leaves?

Rubber tree is a common potted plant, because the leaf shape is unique, a lot of flower friends are farmed, when raising rubber tree, it is inevitable to encounter rubber tree leaf yellowing, losing leaves and other phenomena, so the ornamental value of rubber tree is greatly reduced, but when you encounter rubber tree leaves yellowing, do not worry about falling leaves, to analyze the causes of rubber tree leaves yellowing, the following finishing rubber tree leaves, leaf yellow common 5 reasons.

Analysis on the causes of yellowing and falling leaves of rubber trees 1. Leaves yellowed without changing pots for a long time

Rubber trees usually need to change their pots once a year. Bonsai is a little bigger every year, and can be changed every three years after growing for 6 to 8 years. If you do not change the basin for a long time, it will make the soil hardening, the soil ventilation condition is not good, will lead to rubber tree whisker root asphyxiation and necrosis, can not absorb water and nutrients, resulting in leaf fall.

Solution method

If the temperature reaches above 15 ℃ in spring, change the basin in time. Cut off the dead roots and shake off most of the persistent soil. Remove the yellowed leaves, truncate the stem, and replace it with fertile soil. After changing the basin, keep the basin soil moist, loosen the soil once every 15-20 days, so as to avoid repeated watering leading to basin soil consolidation and cause rotten roots or root atrophy.

2. Malnutrition leads to leaf yellowing

Rubber trees like big fat and water, and long-term non-fertilization and watering will cause malnutrition, resulting in yellowing and falling leaves.

Solution method

When changing the basin, add the base fertilizer, remove the yellow leaves in time, and apply fertilizer once a month, mainly phosphorus and potassium fertilizer. During maintenance, we often observe the wetting degree of the basin soil, replenish water in time, and spray water to the leaves every morning and evening. Note that the water temperature is basically the same as the soil temperature, so as to avoid excessive disparity, resulting in poor plant growth.

3. Excessive watering or fertilization leads to yellowing of leaves.

Although rubber trees like water and fertilizer, if there is too much watering and fertilization, especially from August to September, the weather is muggy, too much watering, the basin is easy to accumulate water, or overwintering, the plant is in a dormant period, and the transpiration is weak, the water in the basin can not be discharged in time. Or mistakenly apply raw fertilizer, big fertilizer, thick fertilizer, will cause plant water damage, fertilizer damage.

Solution.

Cut off the rotting root system, and white milk will flow out from the mouth. Then use plant ash to dry the milk, reduce water evaporation, wait for the cut to dry and then replant. After replanting, pay attention to control watering and fertilization, you can spray water to the leaves sooner or later.

4. Lack of ventilation leads to yellowing of leaves

The indoor wind is different for a long time, the environment is muggy, accumulating a large number of harmful gases, even if the rubber tree has the role of purifying the air, it is difficult to face this situation.

Solution.

Open the window in time to keep the indoor air fresh. In winter, windows can be opened to change indoor air at noon when the temperature is high.

5. Diseases lead to yellowing of leaves.

The conservation environment is not suitable, and rubber trees are vulnerable to Botrytis cinerea, which needs timely prevention and control.

Solution.

Timely removal and destruction of diseased leaves and timely cleaning of withered leaves. Appropriately increase indoor light and increase room temperature. When diseased leaves are found, spraying 600 times of chlorothalonil wettable powder solution in time, 7: 10 can be sprayed once for 2 or 3 times in a row, which can effectively control the spread of bacteria.

What if the leaves of the rubber tree turn yellow and lose the leaves?

Rubber tree leaves are large, glossy, dark green leaves, placed in the home is very vibrant. However, in the process of breeding, it is also easy to have all kinds of problems, so what if the leaves of rubber trees turn yellow and lose their leaves?

The reason why the rubber tree yellowed and lost its leaves

Soil hardening caused by not changing basins for a long time

Rubber trees usually need to change their pots once a year. Bonsai is a little bigger every year, and can be changed every three years after growing for 6 to 8 years. If you do not change the basin for a long time, it will make the soil hardening, the soil ventilation condition is not good, will lead to rubber tree whisker root asphyxiation and necrosis, can not absorb water and nutrients, resulting in leaf fall.

Solution method

If the temperature reaches above 15 ℃ in spring, change the basin in time. Cut off the dead roots and shake off most of the persistent soil. Remove the yellowed leaves, truncate the stem, and replace it with fertile soil.

After changing the basin, keep the basin soil moist, loosen the soil once every 15-20 days, so as to avoid repeated watering leading to basin soil consolidation and cause rotten roots or root atrophy.

The second reason for the yellowing and falling leaves of rubber trees

The yield has not been watered for a long time.

Rubber trees like big fat and water, and long-term non-fertilization and watering will cause malnutrition, resulting in yellowing and falling leaves.

Solution method

When changing the basin, add the base fertilizer, remove the yellow leaves in time, and apply fertilizer once a month, mainly phosphorus and potassium fertilizer.

During maintenance, we often observe the wetting degree of the basin soil, replenish water in time, and spray water to the leaves every morning and evening. Note that the water temperature is basically the same as the soil temperature, so as to avoid excessive disparity, resulting in poor plant growth.

Three reasons for the yellowing and falling leaves of rubber trees

To water or fertilize too much.

Although rubber trees like water and fertilizer, if there is too much watering and fertilization, especially from August to September, the weather is muggy, too much watering, the basin is easy to accumulate water, or overwintering, the plant is in a dormant period, and the transpiration is weak, the water in the basin can not be discharged in time. Or mistakenly apply raw fertilizer, big fertilizer, thick fertilizer, will cause plant water damage, fertilizer damage.

Solution.

Cut off the rotting root system, and white milk will flow out from the mouth. Then use plant ash to dry the milk, reduce water evaporation, wait for the cut to dry and then replant. After replanting, pay attention to control watering and fertilization, you can spray water to the leaves sooner or later.

Reasons for yellowing and losing leaves of rubber trees

Improper ventilation

The indoor wind is different for a long time, the environment is muggy, accumulating a large number of harmful gases, even if the rubber tree has the role of purifying the air, it is difficult to face this situation.

Solution.

Open the window in time to keep the indoor air fresh. In winter, windows can be opened to change indoor air at noon when the temperature is higher.

The fifth reason why rubber trees turn yellow and lose their leaves

Infected with Botrytis cinerea

The conservation environment is not suitable, and rubber trees are vulnerable to Botrytis cinerea, which needs timely prevention and control.

Solution.

Timely removal and destruction of diseased leaves and timely cleaning of withered leaves. Appropriately increase indoor light and increase room temperature.

When diseased leaves are found, spraying 600 times of chlorothalonil wettable powder solution in time, 7: 10 can be sprayed once for 2 or 3 times in a row, which can effectively control the spread of bacteria.

What to do with the yellowing leaves of rubber trees? maintenance methods of rubber trees

What if the leaves of the rubber tree turn yellow? The trunk of the rubber tree is obvious, less branched and has air roots. Rubber tree is a famous potted foliage plant with high ornamental value. Small and medium-sized plants are often used to beautify the living room and study; medium and large plants are suitable to be arranged on both sides of the foyer of large buildings and in the center of the lobby, which is magnificent and can reflect the tropical scenery.

What if the leaves of the rubber tree turn yellow

1. Do not change the basin in time: if the rubber tree is planted in a pot, change the pot in time, because over time, the soil will harden, and the soil will lack nutrients, drainage and ventilation will not become very good, then the leaves will turn yellow or even fall off.

Solution: in the spring, change or turn the basin, then subtract four and yellow leaves, then change the soil, and water it properly.

2. Lack of fertilizer: if there is a lack of fertilizer, especially during the growing period, if it lacks fertilizer, it will cause the leaves to turn yellow.

Solution: when changing the soil, add appropriate fertilizer, in the growing period can be appropriate fertilization.

3. Low temperature: if the temperature is low in winter, then the rubber tree will turn yellow, especially in the north, it will be very cold in autumn.

Solution: so be sure to keep the temperature above 5 degrees Celsius.

4. Stagnant water or lack of water: although rubber trees like warm and humid environment and more fertilizer, more fertilizer and more watering will cause root rot, and will turn yellow quickly if water is scarce, especially in summer.

Solution: cut off the rotten roots and yellow leaves, then change the basin, and wait for the roots to grow before watering.

5. Low humidity: if the humidity is too low, it will cause transpiration to be very important, so if you do not replenish water in time, it will turn yellow.

Solution: watering and replenishing water in time.

6, indoor is not ventilated: dirty air, also cause leaves yellowing, if carbon dioxide is high, will also cause this situation.

Solution: put it in a well-ventilated place.

7. Do not receive light: if there is no light, then the leaves lack chlorophyll and are bound to turn yellow.

Solution: to carry out a certain amount of light every day.

8. May be infected with Botrytis cinerea Botrytis cinerea is a common fungal disease of crops in open field and protected field, which is difficult to control. It is a low temperature and high humidity disease. The high incidence period is when the growth temperature of the pathogen is 20: 30 ℃, the temperature is 20: 25 ℃, and the humidity is more than 90%.

Solution: diseased leaves should be picked and burned in time. Increase indoor light and increase room temperature. Or use 50% nonglidine (ethylene sclerotium) wettable powder 1200 times liquid, or 40% chlorothalonil wettable powder 600 times liquid, alternately spraying, 7 to 10 days once, continuous spraying 2 to 3 times, can effectively control the spread of the disease.

II. Management of rubber trees

1. Temperature: like warmth, the most suitable temperature for growth is 20-25 °. It is resistant to high temperature and can grow well when the temperature is above 30 °. The cold tolerance of variegated leaf varieties with 5 °overwintering temperature was slightly worse, and the overwintering temperature was better maintained above 8 °0. A large number of fallen leaves will be produced when the temperature is low.

two。 Lighting: like bright scattered light, have a certain ability to withstand shade. Can not bear the exposure of strong sunlight, when the light is too strong, it will burn the leaves and appear yellowing and scorched leaves. Should not be too overcast, otherwise it will cause a large number of fallen leaves and dilute the beautiful patches of variegated varieties. From May to September, shade should be provided, or the plant should be placed in a place with sufficient scattered light. The rest of the time should be given plenty of sunshine.

3. Watering: like the moist soil environment, during the growth period should fully supply water, keep the basin soil moist. Watering needs to be controlled in winter. when the basin soil is too wet at low temperature, it will easily lead to root rot.

4. Environmental humidity: like the humid environment, the growing season is sunny and the air is dry, we should often spray water to the branches and leaves and the surrounding environment to improve the relative humidity of the air.

5. Fertilization: due to rapid growth, nutrients should be supplied in time to make the plant flourish and grow. Nitrogen-based fertilizer should be applied 2-3 times a month. The species with colored markings grow slowly, which can reduce the number of fertilization and increase the application of potash fertilizer to make the speckle color on the leaf surface bright. If excessive or simple application of nitrogen fertilizer, the color of the markings will become lighter, or even disappear. In September, the application of nitrogen fertilizer should be stopped and only phosphorus and potassium fertilizer should be applied to improve the cold resistance of the plant. Plant dormancy in winter, fertilizer should be stopped.

6. Pruning: pruning is combined with coming out of the shed in spring, removing the bifurcations, introverted branches, withered branches and weak branches inside the crown, and truncating the branches protruding from the crown, so as to make the interior of the plant ventilated and light permeable and keep the tree shape round. If the crown is too large, the outer branches can be truncated as a whole. Dense branches and short truncated branches should be removed at any time during growth.

7. Turn the basin: usually turn the basin once every 2 years. Like the sandy loam with fertile, loose and good drainage, the matrix can be prepared with garden soil, rotten leaf soil and plain sand, and mixed with farm manure as base fertilizer.

III. Maintenance and pruning

The matrix can be mixed with peat soil, rotten leaf soil, river sand and so on. It is better to be slightly acidic. The leaves of rubber trees are thick, and the requirement for moisture is not very high. In the environment of high temperature in summer and dry in autumn, pay attention to watering and keep the substrate moist. It can also spray water on the leaf surface. After the beginning of winter, the temperature drops, to control watering, the substrate can be slightly drier. Rubber trees do not have high requirements for fertilizer. In the peak growing season, compound fertilizer can be used once a month, but no fertilizer is applied in winter. The optimum growth temperature is 20: 30 ℃. [5]

Pruning

It is generally carried out in late spring and early summer combined with pruning. Select the middle branch of annual Lignification as cuttings, cut off the lower leaf with three buds, close the upper two leaves and tie them with plastic, or cut off half of the upper leaves to reduce water evaporation; in order to prevent the loss of too much milk from the cutting mouth and affect survival, the wound should be smeared with plant ash in time; the treated cuttings should be cut in a bed based on river sand or vermiculite. Keep the plug-in bed with high humidity after insertion, and often sprinkle water to the ground (but not stagnant water) to improve air humidity. Under the condition of 18-25 ℃ and semi-overcast, it can take root after about 2-3 weeks.