What about the yellowing of potted orchid leaves? the reason for the yellowing of orchid leaves / sunburn

What if the orchid leaves turn yellow and cut the diseased leaves?

Orchids are a kind of flowers that are easy to raise, but if they are not cultured properly, they will cause the leaves to turn yellow and wither. There are many reasons for the yellowing of orchid leaves, such as improper watering, lack of light and so on. What if the orchid leaves turn yellow? No matter which reason is mentioned above, we have to lose the yellowing leaves first.

Second, the causes and solutions of yellowing of orchid leaves.

1. Lighting

Orchids have more strict requirements for light, it likes a more shady growth environment, more afraid of the sun, but can not lack of sunshine. Therefore, the growth of orchids will be affected by insufficient or too strong light. Strong light, prone to sunburn, so that the leaves of orchids injured and yellowed. When the light is weak, the plant nutrients of orchids are not enough, and the leaves are easy to turn yellow, which is the reason why the leaves of most orchids turn yellow.

Solution: orchids like semi-shade, in addition to full sunshine maintenance in early spring and winter, put the plants in a well-ventilated place at other times to avoid direct sunlight.

2. Watering

Orchids like the moist growing environment and have high requirements for air humidity. Underwatering can cause root damage or when the air is too dry, it can cause orchid leaves to turn yellow. On the contrary, if too much watering, stagnant water in the basin and poor drainage, the roots of orchids will rot without oxygen, yellow leaves will appear, and even die.

Solution: watering should master the skills, watering should be carried out according to the drying condition of the basin soil, and the right amount should be watered at the right time. Avoid basin soil being too dry or too wet. Pay attention to the air humidity of the orchid growing environment. If the air is too dry, spray water frequently to maintain humidity.

3. Normal yellowing

The growth of orchids needs to be replaced by the new and old with the growth of the plant. Because of the need to develop new leaves, the old leaves will not continue to grow, but will turn yellow and wither and fall off. What if the orchid leaves turn yellow in this situation? This is the yellowing of leaves caused by metabolism, which is a normal phenomenon. There is no need to worry too much.

4. Diseases and insect pests

If orchids encounter diseases and insect pests, there will also be yellowing of leaves, such as leaf spot, anthrax and so on. Rotten roots will also lead to yellowing of leaves, even more harmful, which is also the reason for the yellowing of leaves of orchids.

Solution: in general, orchids have diseases and insect pests, affecting the leaves will be a gradual process. In the early stage of the onset of diseases and insect pests, if they can be found in time, measures can be taken. According to the symptoms of orchids, to judge what kind of diseases and insect pests orchids encountered, and choose the corresponding treatment measures, spraying pesticides or artificial control, will alleviate the yellowing of orchid leaves.

5. Fertilization

If the orchid leaves are yellow caused by fertilization, it is generally due to excessive fertilization at one time, resulting in orchid rhizome burns and leaves yellow. Because the growth of orchids does not need big fertilizer, fertilizer should be applied thinly.

Solution: in terms of fertilization, orchids need to apply thin fertilizer skillfully, and do not apply thick fertilizer, large fertilizer and unrotten liquid fertilizer. On the second day after fertilization, clear water should be irrigated once to dilute the fertilizer and avoid fertilizer damage. The above is the orchid leaves yellowing how to do, orchid leaves yellowing reasons and solutions, I hope to help you.

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Orchids are loved by many flower friends, whether from her appreciation value or from her function of purifying air, it is also a good choice for home potted plants. But what if the leaves of orchids turn yellow and black due to improper maintenance? If the leaves are yellow, it will greatly reduce the ornamental value, here are some orchid leaves yellow and black how to do? The solution: I hope I can help you. [reasons for yellowing and blackening of orchid leaves] first: too much or too little water: orchids like humid climate. if they are short of water for a long time, it will cause drying and shrinking of the part, lack of moisture, and leaves will turn yellow and black. Too much watering of orchid pot soil will also cause root rot, yellow leaves, and even death. Second: the temperature is too high: the yellowing of orchid leaves has a lot to do with the temperature. If the indoor temperature is too high or too muggy, the leaves will turn yellow. Third: too little light: orchids like the sun, if the sun is too little, it will also cause poor plant growth and yellow leaves. In particular, orchids placed indoors must be placed where the sun can shine. Fourth: too much fertilization: many friends think that more fertilization is very helpful to the growth of plants, but this is not the case. Orchids do not need too much fertilizer. If you apply too much fertilizer, it will cause burns in this part, leading to yellowing and blackening of the leaves. Chlorosis can also cause yellowing and shedding of leaves and, in severe cases, plant death. Fifth: the harm of diseases and pests: any plant pests will appear the phenomenon of yellow and black leaves, orchids suffer from diseases and insect pests will cause leaf damage, the emergence of yellow leaves, black leaves. There is not suitable for the use of high pH soil is prone to root rot, root rot black, leaves will also lead to yellowing and shedding.

[orchid leaves yellow and black how to do] 1, watering should be appropriate, after the basin soil is dry, one-time watering should not be too much, nor can it be left unwatered for a long time because of drought. 2, the temperature should be kept stable, but high or too low, 5-10 ℃ is the most suitable, the temperature rises, the muggy environment should pay attention to ventilation, and strengthen humidity management. 3, the white orchid is suitable for planting in the courtyard or home balcony, windowsill and other places, need sufficient sunshine, but can not be exposed to the sun, the summer sun should pay attention to shade. 4. The white orchid pot soil should choose slightly acidic soil, and should not apply more alkaline inorganic fertilizer or water. 0.2% ferrous sulfate should be sprayed on the leaf surface once a week. 5, root rot is mainly caused by too much water, usually wait until the basin soil surface whitening before watering, and often loosen the soil. When Mei Yu dies or Rain Water is too much, it is appropriate to move under the eaves or indoors to take shelter from the rain.

Conclusion: the above is the solution to the yellowing and blackening of orchid leaves. I hope many flower friends can help. The ornamental value of orchids is very high, so we must cultivate orchids well. If you want to know a lot about how to cultivate indoor plants, please continue to pay attention to love nests.

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What to do about orchid leaves yellowing? orchids are indoor plants that many flower friends like to choose to grow, because orchids have high ornamental value, with white and elegant colors and elegant green branches. Putting them indoors can add more vitality to the home and beautify the environment. No matter from the appreciation value of orchids or from her function of purifying air, it is also a good choice for home potted plants. Orchid leaves yellowing, in order to solve this problem, we need to find the causes of orchid leaves yellowing, can not be solved blindly, because the maintenance environment of orchid friends are different, so this paper analyzes and summarizes some common reasons for orchid leaves yellowing. How do orchid leaves yellowing? the cause of orchid leaf tip yellowing is caused by overwatering, which is characterized by no obvious change in old leaves and yellowing in young leaves; this should be controlled immediately. It is that too much water causes the soil to accumulate water for a long time, poor air permeability and even some fibrous roots rot, showing that the young leaves are dark yellow and dull, and the new shoots are shrinking. Too much or too little moisture: orchids like humid climates. if they lack water for a long time, it will cause dry shrinkage, lack of moisture, and leaves will turn yellow and black. Too much watering of orchid pot soil will also cause root rot, yellow leaves, and even death. Drought and yellow is caused by water shortage and drought, which is characterized by the yellow of the old leaves from the bottom to the top. If the water shortage time is a little longer, the yellow leaves of the whole plant, or even death, should be watered in time. Due to the lack of water or dehydration for a long time, although the color of the new leaves is normal, the lower leaves gradually dry yellow and fall off and age. The yellowing of the leaves of sunburned orchids has a lot to do with the temperature. if the indoor temperature is too high or too muggy, the leaves will turn yellow. Strong direct sunlight, especially after summer, leaves have macula, known as sunburn disease. When the high temperature is above 30 degrees, the leaves are also easy to yellowing. The orchid leaves turn yellow and the new buds are smaller, resulting in excessive light, lack of nitrogen fertilizer and necessary humidity. The placement of orchids should be ventilated to overcome the direct sunlight. If the orchid leaves are yellowed and grow normally, it may be caused by excessive light. The solution is to avoid exposure to the sun, regularly wipe the leaves with beer with a rag, and the gentleman orchid scrubbed with beer is not only good-looking but also not easy to lose the moisture of the leaves. Orchid leaves yellowing how to light too little orchids like the sun, if the sun is too little, it will also cause poor plant growth, leaves yellowing. In particular, orchids placed indoors must be placed where the sun can shine. Freezing injury occurs when the orchid is below 0 degrees, and the symptom is still yellow leaves. Fat yellow is caused by excessive fertilization or high concentration, which is characterized by thick, shiny and uneven young leaves; fertilizer, ploughing and watering should be controlled. It is fat and rich, showing that the tip of the old leaf turns yellow and falls off, and the new leaf is thick and shiny, but it is generally concave and convex. If it is a precious flower, you can sprinkle a layer of pakchoi or radish seeds and pull it out a few days after emergence to consume nutrients. Many friends think that more fertilization is very helpful to the growth of plants, but this is not the case. Orchids do not need too much fertilizer. If you apply too much fertilizer, it will cause burns in this part, which will lead to yellowing and blackening of leaves. Chlorosis can also cause yellowing and shedding of leaves and, in severe cases, plant death. Hungry yellow is caused by insufficient fertilizer, low fertilization concentration and long fertilization interval, which is characterized by yellow young leaves and tender stems. If you do not apply fertilizer in time after seeing this phenomenon, it will also cause yellow leaves and even death of the whole plant. For flowers that lack fertilizer, do not apply a large amount of thick fertilizer at one time, so as not to cause root burning. How to deal with the yellowing of orchid leaves? alkali yellow, especially some southern flowers like acidic soil, while the northern water quality is alkaline, the leaves gradually fade, yellowing or even fall off. The easiest way is to pour fermented rice washing water or Rain Water. Due to the great change of soil fertility conditions, woody flowers and plants in iron-deficient yellow leaf greenhouse often appear yellow leaves, which are characterized by obvious young leaves, light old leaves, yellow mesophyll and green veins, and form a typical network, which can be solved by using ferrous sulfate solution. The method is as follows: 7 parts of cake fertilizer, 5 parts of ferrous sulfate and 200 parts of water. If there is a lack of iron in the chlorosis basin soil, the top of the leaf turns yellow first. If there is a lack of nitrogen, the new leaves are yellowish white. Contaminated orchid leaves should be kept clean. If splashed with dirt, the contaminated area may turn yellow. The potted orchids bought directly are newly potted by businessmen, and the orchids do not adapt to the soil, temporarily affecting the absorption of nutrients and leading to yellow leaves. The newly bought orchids are not suitable for orchids to grow in the watering and placement environment. Before buying orchids, they are newly potted, and orchids do not adapt to the soil, which temporarily affects nutrient absorption. The environment of orchids has changed, resulting in poor absorption of water by leaves. The old leaves are yellowed and fall off, which is caused by normal aging or turning the basin. The old leaves yellowed and fell off quickly, watered too often and planted improperly. In addition, flower friends can check whether the rotten roots of orchids or plants are not clean, if the rotten roots are disinfected as soon as possible, dry maintenance in ventilation. What about the yellowing of orchid leaves? leaf spot disease is caused by bacterial infection, which is mainly caused by the change of unmature raw soil, the application of unfermented fertilizer, the long-term failure of basin soil, the imbalance of nitrogen, phosphorus and potassium, and the excessive amount of fertilizer. can happen this disease. In the early stage of the disease, small yellow-brown spots appeared on the leaves, and then the color of the spots gradually deepened, and the area of the spots continued to expand, resulting in festering, so that the whole plant rotted away. Solution: the placement of flowers should be ventilated to overcome the direct sunlight. Orchids often experience leaf tip dryness, or even whole leaf wilt. Flower friends who raise orchids for the first time do not know what to do. Orchid leaf tip dryness is mainly caused by orchid anthracnose and round spot disease. When orchids suffer frost damage or late frost, it is also easy to form leaf tip dryness or discoloration. Let's take a look at the specific solutions. Caused by orchid anthracnose and round spot. The disease occurs in large numbers during the rainy season or when it is hot and rainy at the turn of summer and autumn. The solution is to spray 50% carbendazim or 50% grams of carbendazim 1000 times in the disease-prone period, once every 10 days, for 4 times. Any plant pests will appear the phenomenon of yellow and black leaves, orchids suffer from diseases and pests will cause leaf damage, the emergence of yellow leaves, black leaves. There is not suitable for the use of high pH soil is prone to root rot, root rot black, leaves will also lead to yellowing and shedding. Caused by orchid anthracnose and round spot. The disease occurs in large numbers during the rainy season or when it is hot and rainy at the turn of summer and autumn. The solution is to spray 1000 times of 50% carbendazim or 50% carbendan in the disease-prone period, once every 10 days, 3-4 times in a row. In addition, when orchids suffer from frost injury or late frost, it is also easy to form leaf tip drying or discoloration. Therefore, in areas where the winter temperature is below 0 ℃, orchids should be moved to indoor ventilation and sunny places for maintenance before winter. When you move outside in spring, you should pay attention to avoid the harm of late frost. The traditional experience of "no wind in spring, no days in summer, no dryness in autumn, and no dampness in winter" is of great benefit in preventing orchid leaves from drying up. Orchid leaves yellow how to do orchid leaves dry reason 1, the basin is too dry or air humidity is too small, basin too dry, this kind of situation generally orchid leaves shrink head can not be shown immediately, the first reflection is that the orchid leaves show dehydration, after watering recovery, it is easy to walk grass from the old seedlings, orchid leaves start to go down yellow leaves, if water injury in the basin, orchid leaves yellowing, yellow leaves from the bottom to the top, grass walking time is slow. 2. Langen fungus damage or Langen crystal head affected by water stain should be the same, water stain is a process, crystal head rot is the result, leaf tip coke head is a surface phenomenon. Such a coke tip, as Fei Xiang said, the leaf tip is black, after the treatment in the basin, the general coke head is no longer extended. 3. The focal point is caused by fertilizer damage, and the focal tip is brown or black. The boundary with the non-fat damage orchid leaf is very obvious, and the normal tissue of the orchid leaf is also prone to fat spots, such irregular round spots, the center of the spot is brown, and the place where it comes into contact with the normal tissue is a circle of black spots with uneven thickness, and the boundary is also very obvious. 4. Many of the bacteria damage caused by the orchid strain are shown from the coke tip phenomenon. For example, the blight tip is white-brown, the junction with the normal blue leaf tissue is dark brown, the white brown is the dead dry withered area, the black brown is the fungus outbreak area; the leaf blight, the leaf tip light brown is the dead dry withered area, the dark brown is the fungus damage outbreak area, and most of the contact areas with normal blue leaf tissue are yellowish green, this yellow-green area is the infection area of normal orchid leaf tissue, which is different from the blight tip disease. Anthracnose is also easy to show the focal tip, the leaf tip shows a dark brown, a light brown, alternately to the lower part of the blue leaf, and independent or connected dark-brown patches appear in the leaves, and the periphery of the plaque is yellowish. Solution: when orchids suffer from frost injury or late frost, it is also easy to form leaf tip drying or discoloration. Therefore, in areas where the winter temperature is below 0 ℃, orchids should be moved to indoor ventilation and sunny places for maintenance before winter. When you move outside in spring, you should pay attention to avoid the harm of late frost. Traditional spring is not windy, summer is not day, autumn is not dry, winter is not wet to prevent orchid leaves from drying up. For the orchid leaves that have been withered at the tip, if the situation is not too serious, the method of manual cutting can be used, with scissors, preferably by alcohol disinfection. Cut off about 10 mm below the dry part, so that you can still keep the basin full of green. It would be better if you spray fungicide after pruning. Orchid leaves yellowing how to do orchid leaves yellowing precautions when the wound wants to prevent bacteria changing pots or ramets, there is a wound at the root, you should first smear the wound with fungicide to prevent bacteria from invading. The pot should not be too large and small, and the amount of plant material is too large, which can easily lead to poor ventilation and watering is not easy to control. If watering absorbs too much water, the plant material is not easy to dry, and bacteria invade and cause rotten roots. Orchids should be planted shallowly and orchid plants should not be too deep, otherwise long-term moisture will rot. When planting, filling the root, base, or pseudobulb must be exposed. When planting orchids, the roots should be spread evenly and should not be squeezed together, so that each root can touch the plant material and ventilation is good. If the newly planted orchids are not watered for several days, the roots may be injured, and the wound is coated with fungicides and left unwatered for 3-5 days in order to achieve efficacy and promote the growth of new buds and roots. To avoid strong light, newly planted orchids must avoid direct sunlight to prevent dehydration. They should be placed in a warm and shady place and spray can be used to increase the humidity in the air until the orchids return to normal growth. How to deal with the yellowing of orchid leaves? 1. Watering should be appropriate. After the basin soil is dry, the amount of water should not be too much at one time, nor should it be watered for a long time because of drought. 2, the temperature should be kept stable, but high or too low, 5-10 ℃ is the most suitable, the temperature rises, the muggy environment should pay attention to ventilation, and strengthen humidity management. 3, the white orchid is suitable for planting in the courtyard or home balcony, windowsill and other places, need sufficient sunshine, but can not be exposed to the sun, the summer sun should pay attention to shade. 4. The white orchid pot soil should choose slightly acidic soil, and should not apply more alkaline inorganic fertilizer or water. 0.2% ferrous sulfate should be sprayed on the leaf surface once a week. 5, root rot is mainly caused by too much water, usually wait until the basin soil surface whitening before watering, and often loosen the soil. When Mei Yu dies or Rain Water is too much, it is appropriate to move under the eaves or indoors to take shelter from the rain. For the orchid leaves that have been withered at the tip, if the situation is not too serious, the method of manual cutting can be used, using scissors (preferably by alcohol disinfection) by "∧" in the shape of about 10 mm below the dry part, so that it can still be kept full of green, and it is better to spray on the fungicide after pruning. Note: "not windy in spring, not dry in summer, not dry in autumn, not wet in winter" refers to not moving outdoors too early in spring to avoid strong winds; proper shade in summer to protect against scorching sun exposure; frequent watering in autumn to prevent drought; basin soil should not be too wet in winter to prevent freezing and rotting roots.