What s the matter with black lines on the leaves of the Gentleman s Orchid?

Infected with leaf spot. At the beginning of the disease, the spots are yellow-brown and grayish-brown, and in severe cases, they will turn black. It is generally caused by poor ventilation, and potassium permanganate or carbendazim can be used after discovery**.

If it is more serious, the diseased leaves should be pruned, the plants should be isolated, and the diseased leaves should be burned intensively, otherwise there will be residues of germs.

The leaves of the orchid are blackened, which may be caused by excessive watering, and it is necessary to cut off the rotten roots and water them every 2-3 days, and the soil needs to be replaced with excessive fertilization, and the fertile leaves should be applied every 10-15 days with high nitrogen water-soluble fertilizer.

Orchid maintenance methods.

1 Soil: The native habitat of the Orchid is under large trees in the high-altitude forests of southern Africa, and its roots are rooted in the decaying leaf layer that has accumulated over many years. Gentleman's orchid should be made of loose and fertile neutral or weakly acidic humus soil, and the cultivation soil can be mixed according to humus soil 65, clean sand 20, fine furnace ash 15.

The relative humidity of the soil should be around 40. If the soil is compacted and the drainage is not smooth, it will lead to root rot.

2 Fertilization: Solid fertilizer should be applied once in winter, less nitrogen fertilizer, and more water-soluble fertilizer of potassium dihydrogen phosphate in fertile leaves. Nitrogen, phosphorus and potassium compound fertilizers can also be applied to promote the germination of more new plants and leaves.

Fertilization must be appropriate, do not apply thick fertilizer and unfermented and rotted raw fertilizer, otherwise, it is easy to cause leaf tip scorch or rot. In winter, if the new leaves are spotted and the roots are yellow, it means that too much fertilizer has been applied, and the new leaves are narrow, thin and particularly light in color, which is a sign of fertilizer deficiency.

3. Watering: The soil should not be too dry or too wet, and must be watered thoroughly every time, and more water after the buds. It can be combined with watering every 20 days or so, combining watering and fertilization.

When the room temperature is low, the watering should be controlled to prevent the potting soil from being too wet, which will cause the plant to rot and die, but it should not make the potting soil too dry.

Mainly in the roots, pour out the pot to see the next roots, if there are rotten roots, cut off the rotten roots and replant.

1. If there is a lot of water and rotten roots, is there too much water?

2. The fertilizer is too thick, so it should be applied diligently.

It is also abnormal if the leaves of the orchid are dark green, which is mainly caused by the maintenance environment being too dark. This problem does not occur when there is good or scattered light, especially in winter.

Most of the blackening of orchid leaves is caused by fungal diseases, and then there are fattening, medicine injuries and insect drugs, as long as the mesophyll cells of orchid leaves are damaged, the leaf tissue at the damaged site will rot, so that the leaves appear black spots or patches.

It is a common phenomenon that the edges of the leaves of the orchid are yellow. According to my practice of planting Junzi Orchid, I believe that there are mainly the following reasons: one is the natural aging metabolism of the leaves of Junzi Orchid, the other is that the fertility of Junzi Orchid is too large, especially the use of raw fertilizer that is not ripe and rotten, the third is that the pot is not changed in time, the fourth is strong light burns, and the fifth is the leaf spot lesion of Junzi Orchid.

Spring and summer are the main seasons for the yellowing of the leaves of the orchid. A single leaf of the orchid, after growing for two to four years, will naturally senesce, the senescent leaves, lost the absorption function and photosynthesis, so start from the yellow edge, for the bottom of the aging yellow edge of the old leaves, can be cut from the base three centimeters up, and so on after the remaining leaves wilt, you can remove it, you can also let it fall off naturally, it is best not to tear it off, so as not to infect and rot the wound at the base.

If the fertility of Junzi orchid is too large, especially if it is suitable for organic liquid fertilizer that is not well decomposed, it will easily cause yellow edges of the leaves, which will start from the old leaves, and then spread to the new leaves, and in severe cases, the whole leaf will be yellowed. The yellow edge of the leaf is only a symptom of a problem, in fact, the main cause is a serious problem in the root. Most of the root system has rotted.

In this case, it is necessary to change the soil and replant the roots. The plants can be planted in sandy soil to raise roots, and after the new roots grow and mature, they can be transplanted into nutrient soil for maintenance.

The third point is that it is likely that the pot is not changed in time, the nutrients are insufficient, and the leaves lack nutrients, which will also cause yellow edges. The root system of Junzi orchid is developed, and a large number of new roots will germinate in spring and autumn, and the newly germinated root system likes to grow close to the inner edge of the pot. Therefore, both young seedlings and mature plants must be repotted once a year.

Indoors-planted Junzi orchid is suddenly exposed to strong direct light, or yellow leaves appear, but the yellowing of the leaves caused by this reason does not start from the edge of the leaves, and generally shows spots and patches.

Leaf cotyledon spot disease is a high incidence period in late spring and midsummer. Leaf spot disease is the main disease that affects the leaves of Orchid junigra, and in the early stage of the disease, it also starts from the yellow edge of the old leaves, and then spreads to the new leaves. Once leaf spot disease occurs, methyl tobuzin can be mixed into a paste with less water, and the diseased leaves can be smeared with a small brush.

Attention should be paid to both sides of the diseased leaf should be applied.

The leaves of the junzi orchid are yellow, find the cause and then treat the symptoms, and the leaves are green and long.

Monarch orchid is partially yellow.

Manifestations and causes.

The leaves of the orchid will also have yellowing at the edges of the leaves, and the tips of the leaves will turn yellow or scorch.

The phenomenon of local leaf yellowing is mostly caused by excessive watering. This is due to the improper maintenance of the orchid in daily maintenance, and the lack of oxygen in the root system caused by excessive watering. It may also be because of incorrect fertilization, the fertilizer is too thick, causing root burning and causing local yellowing of the leaves of Junzi Orchid.

and the soil is not aerated, the roots are not breathing well and the drainage is not good, or the maintenance environment is not ventilated enough.

How to fix it. In fact, most of the local leaf yellow of Junzi Orchid is due to improper daily maintenance, and it is necessary to do a good job in the daily maintenance of Junzi Orchid. Do a good job in water and fertilizer management, reasonable watering and fertilization, avoid excessive potting soil or thick fertilizer to burn the roots, so that the leaves of Junzi Orchid are yellow. It is also necessary to pay attention to the frequent ventilation of the orchid so that it grows in a well-ventilated environment, and pay attention to the choice of soil.

Summary. If the humidity is high, see if there are any insect pests, go to the flower shop to see if you buy a package of plant insecticides, spray the leaves with a watering can and spray the leaves, and water the rest of the potting soil three times in a row.

The humidity is high, see if there are any pests in Xianxingyu, go to the flower shop to see if you buy a package of plant insecticides, spray the leaves with a watering can, and pour the rest of the potting soil.

What should I do if a 10 cm long nematode appears in the root of the orchid?

There are insects in the soil of Junzi Orchid, which is generally the reason why the soil is not clean, and it can be changed in time to expose to the sun. Depot the orchid plants from the pot and remove the soil attached to the roots, taking care not to harm the root system. Prepare to keep an eye on the new soil, spread the new soil under the scorching sun, dry the eggs and pests in the soil through exposure to the sun, and then replant it into the soil.

Do you use pesticides?

OK. Insects in the roots are best controlled from the soil.

The self-healing ability of the orchid is relatively weak, and if there is a rotten root, it seems that it is not possible to repair itself on its own, and soon the whole plant will become wilted.

The first thing to do is to open the pot completely, gently pat the pot with your hand for 4 weeks to loosen the soil inside, and then completely remove the soil from the pot. When taking soil, be careful not to hurt its rhizome, and at the same time ensure that there is a part of the soil on its rhizome.

When the whole plant is taken out of the pot, it is obvious what its rhizome looks like. Healthy rhizomes are pale white in color and very resilient. Gently pulling with your hand will not break.

If there is a rotten rhizome, it smells pungent and foul. If you pinch it with your hand, it will fall off. What we need to do is to use scissors to cut off these rhizomes that have become obviously rotten, and only in this way can the problem of rotten roots be fundamentally solved.

After cutting, the rhizome of the orchid should be soaked in carbendazim solution for a few minutes, the purpose of which is to destroy the insects and bacteria parasitic in its rhizome, and then prepare fertile soil for it to plant again.

After a simple operation, Junzi Lan's vitality was so damaged that it took a week to recover. During this time, you should take extra care, do not water and fertilize it casually, just observe it quietly. In a few days, new leaves will grow at its roots.

1. The blackening of the leaves of the orchid may be caused by stagnant water and rotten roots, so it is necessary to remove the orchid from the soil and cut off the rotten roots, replace the soil again to control the amount of watering and carefully maintain, usually you can water it every 2 3 days to keep the soil moist.

2. Although it is said that the orchid needs to provide sufficient nutrients, the amount of fertilizer should not be too much each time, otherwise it will also make the leaves of the orchid black and reduce the ornamental value of the orchid, we can replace the soil for the orchid, and apply nitrogen fertilizer every 10 15 days to make the orchid gradually recover.

3. If the light is too strong, it will also make the leaves of the orchid black, so what should I do if the leaves of the orchid are black, you need to move the orchid to a cool place for maintenance, and provide moisture to the orchid in time, and do a good job of shade and sun protection.

4. The leaves of the orchid are blackened, in addition to the usual maintenance problems, it may also be caused by diseases, it is necessary to improve the growth environment of the orchid, and strengthen the management of it, and also deal with the diseased branches and leaves, spraying pesticides to make the leaves gradually recover their vitality.

If you want to ** Junzi Orchid with a black leaf heart, you first need to cut off all the blackened parts and then disinfect them. The blackening of the center of the leaves may be caused by overwatering, so reduce watering afterwards. It also needs to be kept in a semi-shaded and ventilated environment, during which it is best to control the temperature at about 20 so that it can grow new shoots.

1. Pruning and disinfection

If you want to ** Junzi Orchid with a black leaf heart, we first need to cut off all the black and rotten leaf cores, and destroy them, so as to prevent the spread of germs.

2. Reduce watering

The blackening of the leaf center of the Junzi orchid is likely to be caused by excessive watering, so after cutting off the blackened leaf center, you also need to reduce watering, observe the dryness and humidity of the soil before watering each time, so that the soil is in a slightly moist state is the best, and you also need to avoid splashing water on the surface of the plant.

3. Maintenance method

After pruning the blackened Junzi orchid, it is also necessary to do a good job of maintenance management, at this time, the plant needs to be moved to a semi-shaded and ventilated environment for maintenance, so that it has an appropriate amount of scattered light irradiation, and temperature control measures are also needed during the period, it is best to control the temperature at about 20, so that it can grow new shoots.