The cause of yellowing of the leaves of Cymbidium and its treatment

1. Too much watering leads to rotting roots

Cymbidium is drought-resistant and not resistant to humidity. If it is watered too much, it will lead to stagnant water in the basin, make the root rot, and then cause the leaves to turn yellow.

Solving measures

If the root system does not rot, you can put the magnolia in a cool and ventilated place and stop water for 3-5 days to dry the basin soil before follow-up maintenance. If the root system has rotted, the magnolia should be removed, cut off, soaked in 0.1% potassium permanganate solution to dry, and then re-pot.

2. Excessive fertilization

If the magnolia is fertilized too much, the concentration is too high, or if the fertilizer is not mature, it will lead to yellow leaves.

Solving measures

First of all, stop fertilization and wash the soil with heavy water to reduce the soil concentration; if excessive fertilization has caused rotten roots, immediately change the soil, soak the roots with 0.1% potassium permanganate solution for about 20 minutes, rinse with clean water, cut off the rotten roots after drying, apply plant ash on the wound, and then replant.

3. Lack of light

If the magnolia is in a shady environment for a long time, it will cause the green of the leaves to gradually fade, and the leaves will gradually turn yellow.

Solving measures

You can use fluorescent lamps to replenish the light to the orchid, or transfer the orchid to the place of scattered light and slowly receive the light, and the yellowing leaves of the orchid can be restored soon.

After seeing the causes and solutions of the yellowing of the leaves of Cymbidium, let's take a look at the prevention and treatment of the common disease of Junzhi orchid-white silk disease.

Five reasons for the yellowing of Cymbidium leaves treatment of yellowing of Cymbidium leaves

Flower friends who cultivate Cymbidium may encounter the situation of yellowing leaves, but many people do not know how to deal with them. Let's take a look at the five reasons for the yellowing of Cymbidium leaves and the treatment of yellowing leaves.

Analysis of the reasons for the yellowing of the leaves of Cymbidium:

1. Temperature reason: the suitable temperature for the growth of Cymbidium is 1525 ℃. When the temperature difference between day and night is 8: 12 ℃, it is most suitable for the growth of Cymbidium. If the temperature is too high, the leaves will become shallow, yellow and even wilt.

2. humidity reason: Magnolia is a wetting plant, which requires high humidity of the growing environment. If the basin soil is too dry for a long time and the temperature is high, it is easy to make the leaves yellow.

3. Soil reasons: Magnolia likes loose and fertile sandy soil, soil consolidation and insufficient supply of fertilizer will make the leaves yellow and affect flowering.

4. Lighting reasons: Cymbidium is a semi-positive flower, which likes weak scattered light and is not resistant to strong light. Too strong light is easy to cause sunburn, light leaves change from green to yellow, heavy leaves dehydrate and dry up and die.

5, the reason of ventilation: the orchid is too dense and the surrounding environment is closed, which hinders the air circulation and makes the plant thin and yellow. Therefore, it is necessary to strengthen indoor ventilation to avoid excessive density.

The treatment of yellowing of the leaves of Cymbidium:

Phenomenon 1. The leaves of Cymbidium are yellow and the middle leaves are black and rotten.

Solution: toilet paper or facial Jack paper can be used to absorb rotten juice, use appropriate methods to remove dirt that can be cleaned, usually keep the environment relatively dry, it is recommended to use basin watering method.

Phenomenon 2. All the leaves of Cymbidium turn yellow.

Solution: all yellow, often the symptoms of fever, encounter this situation need to immediately shade, and cut off the yellow leaves.

Phenomenon 3. The leaves of Cymbidium are withered and sagging.

Solution: leaf withering or sagging is a symptom of lack of water, and the principle of no dry and no water in the basin should be mastered when watering in the future.

Phenomenon 4. The leaves of Cymbidium are partially yellowed.

Solution: local yellowing, it is likely to be fire, cold wind, hot water, acid and alkali erosion, and eliminate external causes in time. Sometimes, a lack of nitrogen fertilizer may cause plants to suffer from chlorosis, reducing chlorophyll and causing leaves to turn yellow. In this case, fermented cake fertilizer and water can be added.

Phenomenon 5. The leaves of Cymbidium are wrinkled and yellow spots.

Solution: burn roots caused by excessive fertilization, change the soil immediately, soak the roots with 0.1% potassium permanganate solution for 20-30 minutes, rinse with clean water, remove the rotten roots after drying, spread plant ash on the wound, and replant.

Phenomenon 6. Two outer leaves of Cymbidium turn yellow.

Solution: this is a normal new layer of metabolism, only need to prune the outer 2 leaves.

Phenomenon 7. The leaves of Cymbidium appear grayish yellow.

Solution: the reason for the grayish yellow leaves of Cymbidium is mainly due to the strong direct sunlight and the need for shade.

Phenomenon 8. The leaves of Cymbidium appear yellowing symptoms.

Solution: due to lack of light, if the room is very dark, gentleman orchid will yellowing, with fluorescent lamps to supplement the light.

Phenomenon 9. The leaves of Magnolia are yellow and weak

Solution: leaf yellow and weak is lack of fertilizer, thin fertilizer should be applied frequently; leaf yellowing is native and impermeable, and rotten leaf soil or pine needle soil should be replaced.

The above is the relevant introduction of this article, I believe you have a simple understanding of this after reading it, if necessary, you can continue to pay attention to the No. 1 home network to learn more information.

What about the yellowing of the leaves of Cymbidium, the causes and solutions of the yellowing of the leaves

The yellowing of orchid leaves often occurs in summer, and the yellowing of magnolia leaves greatly affects the ornamental value. I still remember that when I first planted the magnolia, when I saw that the thick leaves began to appear yellow, I was flustered at first and then impatient. That kind of mood was really too bad. At that time, the editor kept wondering what caused the leaves to turn yellow. Later, I collected a lot of information. Finally, prescribe the right medicine to solve the problem of yellowing leaves. If your gentleman orchid also has such symptoms, then hurry up according to the symptoms of the editor, give your orchid, prescribe the right medicine to the case!

The reason for the yellowing of the leaves of Cymbidium: temperature

The suitable temperature for the growth of Cymbidium is 1525 ℃. When the temperature difference between day and night is 8: 12 ℃, it is the most suitable for the growth of Cymbidium. When the summer temperature exceeds 30 ℃ for a long time, it goes into semi-dormancy. At this time, if the air humidity is less than 60%, the leaves of Cymbidium will become shallow, yellow and even wilted; if the humidity is higher than 90%, the stems and leaves will grow.

In order to prevent the occurrence of these bad phenomena, measures should be taken to cool down, and then ventilation and light transmission should be taken to control humidity. When the winter temperature dropped below 8 ℃, the growth of Cymbidium basically stopped. If the temperature drops below 6 ℃, freezing injury will occur, which will make the leaf tip and leaf edge fade to yellow, and even appear yellow-white necrotic marks.

The second reason for the yellowing of Cymbidium leaves: humidity

Magnolia is a humid plant, which requires high humidity of the growing environment. Its most suitable relative humidity range is 70% 80%. In this humidity environment, the leaves of Cymbidium are green, the veins are clear, the leaves are short, wide and neat, and the ornamental value is high. If the basin soil is too dry for a long time and the temperature is high, it is easy to make the leaves yellow. However, too much watering for a long time can easily lead to hypoxia, hinder the normal respiration of plants, and lead to root rot and even death.

The third reason for the yellowing of the leaves of Magnolia: soil fertilizer

Gentleman orchid likes loose and fertile sandy soil, soil consolidation and insufficient supply of fertilizer will make the leaves yellow and affect flowering. Generally, fertilizers can be applied in spring and autumn in one year. The rotten-resistant leaves must be fermented before they can be used. Without fermentation, the roots are easily burned. The magnolia must change the soil once a year. When the temperature of the maintenance site is above 25 ℃, it is necessary to lose weight or stop fertilizing properly, so as not to burn the fleshy roots with too much fertilization. if the temperature can be reduced to below 20 ℃, you can still apply fertilizer.

The solution to the yellowing of the leaves of Cymbidium:

1. The leaves of Cymbidium are yellow, and the middle leaves are black and rotten.

Solution: the emergence of this symptom requires the above nine methods to prescribe the right medicine to the case. While the middle small leaves blackened and rotten, we need to make a further judgment, break open the two leaves to check, if the gap between the leaves blackened out of festering juice. It can be judged that the formed gentleman orchid arrow did not have time to grow out of the leaves and rot directly in the middle of the leaves.

There are many reasons for flower and arrow rot: one is that too much water is sprayed in the hands of the florist, causing sewage to flow into the crevice and lead to bacterial infection, and the other is due to careless watering that causes sewage to splash into the crevice and cause rot. Consequences: under normal circumstances will not affect the life of the orchid, but if in high temperature and humidity weather, it is very easy to cause wiping head and the whole plant rot. Treatment: toilet paper or facial Jack paper can be used to absorb rotten juice, use appropriate methods to remove dirt that can be cleaned, and usually keep the environment relatively dry, it is recommended to use basin watering method.

two。 All the leaves of Magnolia turn yellow

Solution: all yellow, often the symptoms of fever, the solution: immediately shade, and cut off the yellow leaves.

3. The leaves of Cymbidium are withered and sagging.

Solution: withered or sagging leaves are symptoms of lack of water. Watering should grasp the principle of no dry, no watering, no stagnant water in the basin.

4. The leaves of Cymbidium are partially yellowed.

Solution: local yellowing, it is likely to be fire, cold wind, hot water, acid and alkali erosion. You can rule out external causes in time. Sometimes, the lack of nitrogen fertilizer may cause plants to suffer from chlorosis. The decrease of chlorophyll causes the leaves to turn yellow. In this case, fermented cake fertilizer and water can be added. (the methods of breeding vary with different seasons)

The above is the knowledge of gentleman orchid that I introduce to you. I hope it will be helpful to you. Please continue to pay attention to the succulent flower bed and learn more information.