The leaves of the junzi orchid appear yellow spots, slowly expand, and the leaves rot, what should I

The reason for the yellow leaves of the Gentleman's Orchid is mainly due to improper management. There are several reasons for the yellow leaves of Junzi orchid: 1. The water is too big:

If the pot is waterlogged for too long, the leaves are prone to infiltration yellowing, which occurs at the tip of the young leaves, and the symptoms develop from top to bottom. 2. Lack of water: too dry, or watering half of the water every time, the old leaves should be yellow tips.

3. Hypertrophy: too much fertilizer is too concentrated, which will cause root burning and yellow tips of leaves. 4. Lack of elements and loss of green:

If there is a lack of iron in the potting soil, the tips of the leaves will turn yellow first. If nitrogen is deficient, the new leaves are yellowish-white. 5. Sunburn:

After strong direct sunlight (summer), yellow spots develop on the leaves, which is called sunburn. When dry at high temperatures (above 30), the leaves are also prone to yellowing. 6. Pollution:

The leaves should be kept clean, if they are splashed with dirt, the contaminated area may turn yellow. 7. Frost damage: Frost damage occurs when the orchid is below 0, and the symptoms are still yellow leaves.

In order to restore the normal growth of the monarch orchid after yellow leaves, it is necessary to find out the source of the disease and take corresponding measures. The method is: dig out the whole Junzi orchid to check the roots, such as rotten roots, remove the rotten parts, re-cultivate with new soil, and pad a layer of fine sand under the roots.

The potting soil should be loose humus, and the pH value (pH value) should be neutral. The soil is not dry or wet, and it has good aeration. Junzi orchid likes weak light, except for winter, summer should be placed in a place of half shade and half yang, avoid direct sunlight.

If it happens"Lack of green disease"Liquid fertilizer (such as alum fertilizer water) can be added, the main point is that the amount is less and more often, be careful not to splash the fertilizer or mud on the leaves, and the stems, such as splashing on the leaves, should be washed off with water in time. Solid fertilizers should also be applied in direct contact with fleshy roots as well.

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

1. Cut off the diseased leaves.

The yellow spot on the leaves of the orchid is mostly caused by leaf spot, the spread of leaf spot is very fast, you can first cut off all the diseased leaves of the orchid, and then burn them all and bury them deep in the soil to prevent the spread of leaf spot.

2. Change the soil in time.

Before changing the soil, the roots of the orchid should be cleaned, and if the diseased roots are found, they should be cut off in time and planted in new soil.

3. Spray the agent.

Spraying the concentration of 500 1000 times the liquid, the fungus can effectively prevent and control leaf spot and other diseases, but it is best to spray once every 15 days, spray 3 or 4 times at a time, until the leaves of the orchid recover.

The leaves of the orchid are yellow.

There are generally several situations.

Since, if the bottom leaf grows new roots from the leaf axil, it is normal metabolism to make the leaf yellow. One situation is that the leaf axils do not grow new roots and the leaves turn yellow, which is mostly due to soil quality, poor air permeability, too much fertilizer or poor watering and humidity control of the roots, which may make the leaves of the Junzi orchid yellow. Water can not be watered, the root tip lacks water, it will make the leaf tip turn yellow and dry tip, in this case, it must be watered thoroughly, in summer, every 7 10 days at the bottom of the pot can sit a small pot of water, so that you can ensure that the water is watered, this is called the water immersion method.

Another condition is the appearance of yellow spots of varying sizes on both sides of the leaves, called brown spots. This is mainly due to the fact that the soil is relatively grown, and the amount of fertilizer applied is too large. Generally speaking, the potting soil should be made of humus, with good air permeability, especially in summer fertilization, thin fertilizer should be applied frequently, and fertilizer water should not be dripped onto the leaves, so as to prevent the occurrence of spot removal.

In another case, due to the abundant sunshine and high temperature in summer, if the orchid is exposed to the sun, solar fever will also occur, and the leaves will turn yellow and wilt in the heavy. In summer, shading should be taken, a ventilated place should be placed, the shade avoidance degree should be 50, and the south window of the home can be shaded with a layer of gauze.

Soft rot. Germs often invade from the wound. At the onset of the disease, light yellow water-stained spots appear on the leaves, and then expand into regular lesions, so that the leaves become brown soft rot compounds, and there is fungal liquid flowing out of the lesion wounds.

Prevention and control methods: Once the disease is found, the diseased plants should be separated immediately, the culture soil around the plants should be peeled off, the diseased parts should be exposed, the rotten leaves should be broken, the rotten parts should be scraped off with a sterilization knife, and the sunlight should be properly irradiated to keep the ventilation and dryness; If there are many decayed plants, all diseased tissues must be removed, soaked in potassium permanganate aqueous solution for hours, rinsed with water to dry, smeared with plant ash at the incision, and planted in a new pot, placed in a ventilated place with low temperature; Drugs** can be sprayed or smeared with penicillin or streptomycin or oxytetracycline plus double water solution, which has a certain effect.

Most of the reasons for just changing pots, spray some potion to avoid dispersion of the disease, you can have sunlight, but not exposure to the sun.

The middle part of the leaf is bai

The macula with "numb-skinned du" appears on the surface of zhi, which is the backstain of foliar pathogens from the surface, and the essence is the root.

A: The above symptoms will occur if the potting soil is too dry and wet, or placed in a hot and unventilated place, or unfermented "raw fertilizer" and thick fertilizer are applied.

Rescue method: If there is a problem with fertilization, it should be repotted immediately and replanted. If it is not placed in the same environment, the place should be changed. Usually, the potting soil should be dry, not too wet, and cut off the macula part to allow new leaves to grow.

After changing the pot, the leaves of the junzi orchid have yellow spots, curled edges, and split ends, what should I do?

Causes of leaf spot disease:

1) Nutrition is too raw. Horse manure soil or leaf soil must be fully fermented.

3) The potting soil is not well disinfected. If possible, the soil can be steamed or fried to achieve the purpose of disinfection. Or dilute the water with sterilel and spray it to mix and sterilize thoroughly.

4) Lack of nutrition. Purple-brown and yellow-green spots on the leaves are a sign of fertilizer deficiency, especially potassium deficiency.

5) The rust spots on individual leaves are often caused by the direct contact of fertilizer with a fleshy root or the mechanical contusion of a fleshy root.

There is no need to panic when leaf spot occurs, it can be solved by soil exchange. When changing the soil, wash the fleshy roots with clean water, dry them and then put them on the pot. If any of the leaves are rotten and unsightly, simply cut them off.

In addition, it is an organic sulfur arsenic compound fungicide, which can prevent and control a variety of true grate diseases, such as white rot, brown spot, stem spot, etc. Use a concentration of 500 1000 times the liquid, spray once every half month, and spray 3 or 4 times in a row to collect effect. Antibacterial is unique to toxicity, pay attention to safety when using.

In addition, you can use magnetized water to water the orchid all year round, which can also effectively avoid the leaf spot disease of the orchid.

The small yellow spots on the leaves of the orchid are yellow spot or brown spot, which is caused by poor maintenance environment during growth, to avoid this phenomenon, it should be avoided from direct sunlight in summer, placed in a ventilated and cool place, and often sprinkled water on the ground to increase air humidity and improve the small environment. In winter, try to get as much sunlight as possible to accumulate nutrients and provide more energy for flowering and growing new leaves.

Prevention and control methods: If the yellow spots in the leaves are dense, you can cut off the damaged leaves, and spray 800-1000 times of 50% carbendazim wettable powder on the whole plant, spray it once every 7 days or so, and spray it about 3 times in a row to stabilize the condition. or methyl tobuzin, antibacterium, zebsen zinc and other bactericidal drugs.

It also has good effects with potassium permanganate. If the yellow spots are not very serious, they can be directly sprayed to prevent and control, but the yellow spots may still appear on the leaves, which can only control the disease from developing and deteriorating, which is a common disease. It is recommended to focus on prevention in the future, try to let it grow under relatively good environmental conditions, and the plants are robust in order to resist the infection of pests and diseases.

Watering should be controlled in a dry state, but the supply of water-based fertilizers should be appropriately increased during the arrow period. Excessive watering and insufficient light are important reasons for the low disease resistance of plants, so to avoid mutual infection between diseased plants, they should be isolated and maintained, and then concentrated and co-cultivated after recovery.

Orchid leaf spot: It is a small yellow spot on the leaf, and the lesion is enlarged, and the diameter can reach 3?about 5 mm, round; When the lesions spread and become connected, the leaves will turn yellow.

The other is that the lesions on the leaves are large, irregular in shape, yellow-brown to gray-brown, slightly whorled, and small black spots appear on the back of the lesions in the later stage. Both of the above diseases are caused by poor ventilation and parasitism of scale insects, resulting in weak plant growth. The prevention and control methods are:

Apply the lesions with potassium permanganate solution, or spray with 50 carbendazim 1000 times solution; If the disease is severe, the damaged leaves should be removed, burned, and dried with sterile absorbent cotton at the wound.

Put it in a ventilated place and look slowly. If it continues to deteriorate, it is necessary to turn over the pot to disinfect and change the soil.

If the leaves continue to rot, it is considered that there is a problem with the roots, and carbendazim is sprayed and watered, so as not to get on the leaves.

There are spots on the leaves of the orchid, and if you want to solve it, it is very easy to operate, and several methods can be completely improved.