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Celery mosaic disease can occur throughout the growing season of celery, so prevention is extremely important. Celery mosaic disease is infected at the seedling stage, yellow mosaic leaves or systematic mosaic leaves, early onset, mottled or mosaic leaves appear on the young leaves, the diseased leaves are small, some are twisted or the leaves are narrowed; petioles are slender and the plant is dwarfed; Late onset is more common in the flowering leaves with thick and light green leaves, and the plants are normal. This seriously affects the yield and quality of celery, so how to prevent and control celery mosaic disease?
The first is to strengthen field management, scientific water and fertilizer, and improve the resistance of plants. Second, if the seedlings are found, they should be removed in time to prevent infection. The third is to insist on aphid control during the growth of celery to reduce the spread of the virus.
The fourth is to spray antiviral preparations such as 1000 times of phytolingling emulsion or 100 times of 83 anti-agent for drug prevention and control, and spray 1 3 times in a row.
The main reason for the drying up of rhododendron leaves is that the air humidity is too low.
Rhododendron likes sunlight, but also afraid of strong direct light, shade tolerant, the growth environment is generally semi-shaded, summer high temperature period, the sun is also strong, need to be dormant maintenance, placed in a semi-shaded and ventilated place, increase air humidity, potting soil dry and wet alternately, not too wet or dry; During the growing season, it is necessary to keep the potting soil moist, and it is easy to fall leaves when it is dry, and it affects the growth and development.
In summer, due to high temperatures, try not to fertilize, and it is not too late to fertilize in autumn when the weather turns cooler. Fertilization is based on the principle of thin fertilizer and diligent application, and it is not possible to be greedy, otherwise it is difficult to damage fertilizer.
Because the rhododendron likes a humid environment, there can be a breeze in the environment, but it must not be placed at the tuyere of the wind, otherwise too much water will be lost, and the leaves will dry up.
Celery mosaic disease can occur throughout the growing season of celery, so prevention is extremely important. Celery mosaic disease is infected at the seedling stage, yellow mosaic leaves or systematic mosaic leaves, early onset, mottled or mosaic leaves appear on the young leaves, the diseased leaves are small, some are twisted or the leaves are narrowed; petioles are slender and the plant is dwarfed; Late onset is more common in the flowering leaves with thick and light green leaves, and the plants are normal. This seriously affects the yield and quality of celery, so how to prevent and control celery mosaic disease?
The first is to strengthen field management, scientific water and fertilizer, and improve the resistance of plants. Second, if the seedlings are found, they should be removed in time to prevent infection. The third is to insist on aphid control during the growth of celery to reduce the spread of the virus.
The fourth is to spray antiviral preparations such as 1000 times of phytolingling emulsion or 100 times of 83 anti-agent for drug prevention and control, and spray 1 3 times in a row.
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The edges of the flowers and leaves are scorched and dry due to insufficient humidity, low ambient humidity or when the plant is kept close to a heater or stove, which can cause the leaves to dry up. In addition, too much fertilization of plants usually leads to root burning, disease and insect damage, or too strong light causes sunburn on leaves, which will cause plant leaves to dry up and burn.
1. Insufficient humidity.
Lack of humidity is one of the main reasons why the edges of the flowers and leaves are scorched and dry, and this can happen if the ambient humidity of the cultivated plants is very low, or if the plants are cultivated too close to the heating or stove in winter. This is by spraying the plant with some water to increase the humidity, or by placing a pot of water directly next to the plant.
2. Too much fertilization.
The edges of the flowers and leaves may be scorched and dried up due to too much fertilization, too much fertilization or too high fertilizer concentration will cause the plant to burn the roots, and the root system of the plant will not be able to absorb nutrients and water, and the leaves will also be stored. This situation necessitates the replacement of new soil and the cutting of burnt rhizomes.
3. Pest and disease infestation.
In addition, the edges of pothos leaves are scorched and dried up like fire, which may also be caused by pests and diseases, which will gradually absorb the nutrients of the plant, and the leaves will dry up or fall out. In this case, you can scrape off the insect pests on the leaves of the plant by hand, and if there are more insects, you need to spray pesticides to kill them.
4. The light is strong.
Strong sunlight is also a common cause of burnt and dry edges of plant leaves, and if the plant is exposed to strong sunlight, the leaves are prone to burns, and the leaves will turn yellow and dry. In this case, the plant needs to be moved to a place with good astigmatism in time for maintenance.
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If you want to raise flowers indoors, there is a possibility that the outer ring of flowers and leaves will dry up, and the following will also talk about what causes it:
1. If you don't have enough water, you don't have it, just water.
2. If the light is too strong, the transpiration will not be able to reduce the temperature of the petals in time, and the edge of the petals will wither first, and then the whole petal will wither.
3. The humidity is not suitable and too low.
4. The temperature is too high.
5. A large amount of phosphorus and potassium fertilizer is needed during the flowering period, if the soil is not enough, the potassium will be transferred from the old leaves, it is recommended to use the potassium dihydrogen phosphate of the Vosch Wo leaf for spraying, the absorption rate is high, and the effect is good.
6. The fertilization is too heavy, and the seedlings are burned.
Flower. First, the humidity is not enough.
Reason: If the humidity of the cultivated plant is too low, or the winter maintenance location is too close to the heating or stove, its leaves are prone to scorching.
Treatment: To increase the humidity quickly, you can put a pot of water next to the plant, or spray some water. If it's too close to the heat, move out in time. Be careful not to water it too much, too much water will harm the plant.
2. Insect infestation.
Reason: If there is a pest on the leaves of the plant, it will slowly absorb the nutrients from the leaves, causing the leaves to slowly scorch and wither from the edges. Over time, there may be a phenomenon of leaf loss.
Treatment: Observe the number of insects on the leaves, a small amount can be manually scraped, if the number of insects is relatively large, then it should be sprayed as soon as possible.
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This is due to the lack of nutrients in the leaves, which causes the outer ring of the flowers and leaves to dry up. You can fertilize the flowers and then take care of them, and they should return to normal in no time.
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Is there heating or air conditioning in the home? It may be caused by the indoor air being too dry, and it may be better to spray the foliage a little bit every day, and spray it several times a day.
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The main reason for indoor flower raising, the outer circle of flowers and leaves, and dry leaves is the high indoor temperature, and the solution is to prepare a small spray can to spray the front and back of the flowers and leaves every morning and evening, which will have a certain effect.
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After the leaves do not appear in the outer circle of dry leaves, then this, there are many reasons, firstly, it is winter, the temperature is reduced, dry leaves and yellow leaves are a normal phenomenon, secondly, if placed indoors, do not get a certain amount of sunlight, such a phenomenon is also a lack of nutrition, you can use some nutritious compound fertilizer to water.
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The outer ring of the leaves is dry when the flowers are raised indoors.
If it is under the normal metabolism.
If it appears above.
In the case of making sure that there is no shortage of water.
That's the water is rotten.
Remember not to be too diligent in raising flowers.
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This should be if the humidity in the house is not up to the standard.
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Lack of nutrients, lack of water. It's not long lived.
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It's not that the flowers raised indoors are not good enough, not as healthy and vibrant as the outdoors, but the indoor environment is not as good as the outdoors, we can also see some flower friends, their own sun room, light, ventilation and other very good control, indoor flowers are still very splendid, not at all outdoor flowers, but this requires extremely high maintenance skills and rich experience in planting flowers, after all, we are most often in contact with outdoor naturally growing plants, and we are accustomed to outdoor plants. Therefore, there is a certain cognitive bias against the fresh flowers in the greenhouse as soon as they are moved outdoors for maintenance.