What s going on with brown spots What to do if there are spots in the gentleman s 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.

If there are spotted celery spots on the new leaves of the potted orchid, and the root system is also yellow, it means that the fertilizer has been applied too much. If the new leaves are narrow and thin and the color is particularly light, it is a sign of fertilizer deficiency.

If the fertilizer is too large and thick, the leaves will be infected by mold and will also lead to leaf rot. Immediately after the rotten leaves are found, control the water in time, cut off all the parts of the rotten leaves, carry out thorough disinfection, and put them in a ventilated and light-permeable place for maintenance.

The temperature between 15 and 20 degrees Celsius is the best time to grow. 0 below the leaves will be frozen, in winter to do a good job of keeping warm, in summer to prevent the scorching sun, so as not to be exposed to strong light, resulting in the yellowing and withering of the leaves, to half shade and half yang as well.

Junzi orchid is a plant that everyone loves, because of its high ornamental nature and is sought after by everyone, among which the ornamental nature of the leaves is prominent, but recently some friends have reported that the leaves of the Junzi orchid at home appear melasma, which greatly reduces its ornamentality.

What to do if melasma appears on the leaves of the orchid 1, cut off the yellow spots 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. Timely soil change for the problem of yellow spots on the leaves of the Junzi Orchid, in addition to cutting off the diseased leaves, you also need to change the soil in time, before changing the soil, clean the roots of the Junzi Orchid, if you find rotten roots, you can cut it off, and then plant it in the new soil.

3, spraying pesticides Junzi Orchid suffering from leaf spot disease can also be sprayed with pesticides to prevent and control, spraying fungi concentration of 500 1000 times the liquid, fungi can effectively prevent and control leaf spot disease and other diseases, but 15 days to spray Jinkai once, a continuous spray 3 4 times, until the leaves of Junzi Orchid recover.

1. Anthracnose In addition to leaf spot disease, anthracnose is also a common disease, anthrax is a small brown spot around the leaves at the beginning, if it is not for a long time, it will spread to the whole body of the monarch orchid, and gradually wither and die.

Prevention and control methods: If it is found to be anthracnose, you can not cut off the diseased leaves, just reduce the amount of watering, apply more fertilizer, and then put it in a sunny and well-ventilated place, spray 60% anthrax forme plus 1000 times the water solution every other week, spray 5 times each time, until recovery.

2. Scale insects are common insect pests of Monarch Orchid, which will gather on the leaves of Monarch Orchid, absorb nutrients and water in the leaves, and make the leaves wilt, and even the excrement secreted by Scale Worms can also produce a large number of bacteria, which will cause leaf spot, anthracnose and other diseases, which has a very great impact on Monarch Orchid.

Prevention and control methods Tongzao: If we find a small number of Jiexiang wheel call shell insects, you can use a toothpick to remove scale insects, clean it with water, if you find a large number of scale insects, directly spray 25% imidothion milk 1000 times the liquid, 3 days will be cleaned with water.

White silk disease occurs when this disease occurs, the stem near the root appears water-stained brown irregular lesions, the cortex is soft rot, and then white silky mycelium spreads on the rhizosphere soil surface, and later becomes a small sclerotia, and finally becomes rapeseed-like, expanding to the entire base of rot and necrosis. Prevention and control methods: Before potting, the culture soil should be disinfected.

The simpler method is to place the culture soil at a temperature of 60 for 24 hours; Always pay attention to the surface of the soil, and if you find the white fungus line, you will pick it out and burn it, and sprinkle some lime powder around the hole for disinfection; At the beginning of the disease, water 500 times of 50% carbendazim wettable powder on the base of the plant stem and the base insight and the surrounding soil, 1 time a week, 2-3 times. Soft rot Germs often invade from wounds. 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 5% potassium permanganate aqueous solution for 1 hour, rinsed with water to dry, smeared with plant ash at the incision, and planted in a new pot, placed in a ventilated place where the temperature is not high; Drugs** can be sprayed or smeared with penicillin or streptomycin or oxytetracycline plus 4000-5000 times aqueous solution, which has a certain curative effect. Anthrax This disease mostly occurs in the rainy, humid and hot season, and the onset is mostly at the tips and edges of the leaves.

At the beginning, the leaves appear moist brown spots, then expand into oval and main lesions with the same wave, and the surrounding area is yellow, and gradually shrank and dry up in the later stage. The potting soil is too wet, and the excess nitrogen fertilizer is prone to this disease. Prevention and control methods:

Give the pot a well-ventilated and sunny environment, and the potting soil should only be moist, not too much and too dense. Increase phosphorus and potassium fertilizers and control nitrogen fertilizers. When the signs of disease are found, a solution should be made immediately with 50% wettable carbendazim powder plus 800 times water, or sprayed with a solution of 60% anthrax formami plus 1000 times water, about 6 days 1 spray, 3-5 sprays can be effective.

It is very likely that the spot is caused by leaf spot, and the spot should be cut off as soon as possible, as it will endanger other healthy leaves if not pruned in time. Usually too much watering and fertilization can also cause leaf spots, so it is necessary to control the amount of water and fertilizer to avoid undesirable performance. 1. Causes of spots.

When it is found that the leaves of the spotted orchid are slippery, the leaves with the spotted should be cut off as soon as possible, and the maintenance method should be changed during daily maintenance. If not pruned as soon as possible, the diseased leaves will infect more healthy leaves, which will also affect the overall ornamentality. 2. Poor performance.

When the orchid is attacked by leaf spot, the leaves will show undesirable performance. At the beginning of the disease, there will be small brown spots on the leaves, and if not treated in time, large spots will appear.

3. Precautions.

If the amount of watering and fertilization is too large, there is also a possibility of spots on the leaves. The amount of watering should not be too large during maintenance, and it should not be allowed to grow in a relatively high humidity environment for a long time. When fertilizing, it should also be reasonable, do not apply too much fertilizer at once, and should apply thin fertilizer frequently.

Melasma leaves can be pruned, sprayed, soil replaced, and replanted.

1. Prune

At this time, you can prune the leaves of the orchid, use sterilized scissors, cut off the leaves with melasma, so as not to infect other healthy branches and leaves, and apply plant ash to the wound after pruning to help the wound heal.

2. Spray the agent

The leaves of the orchid have melasma, and they can also be sprayed. First of all, you need to buy a special sterilization and fungicide from the market, and then according to the use method on the package, mix the agent with water, spray it on the leaves of the Monarch Orchid, and spray it every other week, three times in a row to completely eliminate the disease.

3. Replace the soil

The brown spot disease may be caused by the fact that the soil is too moist and bacteria grow, so in the process of treating the orchid, it is necessary to replace the soil. When replacing the soil, humus soil with rich trace element content can be used, or loose and breathable sandy soil can be used.

4. Replant

Before replanting the orchid, you need to dry the soil in the sun for a day to eliminate the bacteria in the soil, or you can soak the orchid in carbendazim solution to eliminate the bacteria attached to the roots, and then plant the sterilized orchid in the new soil, and use fine soil to cover the roots.

The reason for the melasma of the gentleman's orchid

Orchid has leaf spot or anthrax, or has been infested with insect infestation. Let the leaves of the junzi orchid appear yellow-brown lesions, and even harm the entire leaf.

Pruning the diseased leaves: Cut off all the diseased leaves on the orchid, and then burn them intensively or bury them deep in the soil. Replacement of soil:

First, the plants are depotted, pruned with rotten roots, long roots, and weak roots, soaked and disinfected with carbendazim solution, and then replanted. Spraying agent: spray 500-1000 times of fungus once every 15 days until the leaves return to green color.

1. Prune off diseased leaves

In order to avoid endangering the whole plant, the diseased leaves on the orchid should be cut off first, and then burned or buried deep in the soil to prevent the spread of leaf spot.

2. Replace the soil

After pruning the diseased leaves for the orchid, it is also necessary to replace the soil for the plant immediately, because there may be potential germs in the soil, before changing the soil, depot the orchid, then prune the rotten roots, long roots, and weak roots, soak and disinfect with carbendazim solution and replant.

3. Spray the agent

After the potted planting of the Junzi Orchid, it is necessary to spray the agent to completely eliminate the pathogen of leaf spot disease, you can choose 500-1000 times of the fungus, and the frequency of the drug is once every 15 days, and the continuous spraying is 3-4 times until the leaves of the Junzi Orchid are restored to green again.

4. Later maintenance

In the later maintenance process of Junzi orchid, in order to prevent the continued invasion of germs, each watering should not be too much, to avoid the soil being too wet, try to follow the watering principle of seeing dry and wet, and to avoid applying thick fertilizer, and supplement phosphorus liquid fertilizer once every 10 days.