What to do if the edges of a camellia leaf turn brown and fall?

The edges of the leaves of the camellia turn brown and fall off, probably infected with anthracnose, you can cut off the diseased branches and leaves, gather them and burn them, and spray 65% zeb zinc wettable powder 800 times liquid and other fungicidal drugs on the camellia.

It may also be that the roots are rotten due to improper water and fertilizer, so you can take out the camellia plants, prune off the rotten roots, disinfect and sterilize them and replant them. It may also be that it has been exposed to the sun, avoid strong light, and move the camellia to a cool and ventilated place to promote leaf recovery.

1. Infection with anthrax.

Reason: Camellia is a very beautiful flower, if you are accidentally infected with Colloidal Anthracnose, it will cause anthracnose, and the edges of the leaves will turn brown and fall off. In the early stage of infection, the diseased part of the leaf will appear green water-stained lesions, and then gradually turn brown, the lesions will expand, and there will be many small black spots, so that the whole leaf will be infected with the disease, and eventually lead to water loss and fall off, affecting the growth of the entire camellia plant.

Solution: For the already infected camellia, you can cut off the diseased branches and leaves, gather them and burn them. Spray 800 times of 65% zebsen wettable powder, 800 times of 50% wettable tobuzin, 800 times of 50% carbendazim wettable powder, etc., spray once a week or so, and continuously cross-spray.

2. Root rot.

Reason: If the camellia is not watered and fertilized properly during growth and maintenance, it may cause root rot, so that the edges of the leaves will turn brown and fall off.

Solution: After the rotten roots are found, they should be treated in time, take out the camellia, cut off the rotten roots in time, disinfect and sterilize and replant.

History. The history of camellia cultivation in China can be traced back to the Shu Han dynasty (221-263 AD). At that time, people attached great importance to the status of camellia, and camellia was listed as "seven products and three lives".

According to the data, there are more than 20,000 registered camellia varieties in the world. There are 883 varieties of camellia in China.

In the Three Kingdoms period, camellia was already cultivated artificially. However, until the Northern and Southern Dynasties and the Sui Dynasty, the imperial court and the aristocratic courtyards were still wild and primitive camellias, with single-petaled red flowers. At that time, the literature about camellia and the poems of "camellia" and "sea pomegranate" chanted by literati did not involve the name of the variety.

The above content reference: Encyclopedia - Anthrax.

1. Overwatering. Camellia is drought-tolerant, afraid of waterlogging, excessive watering will make the roots rot, leaves black and fall off, drain the stagnant water and put it in a ventilated place, or replace the potting soil, the soil is dry and watering, avoid waterlogging, rainy weather is not suitable for watering.

2. Pests and diseases. The blackening of the camellia leaves may be infected with anthrax.

Cut off the diseased leaves in time and destroy them in a centralized manner, and spray 25% carbendazim wettable powder to avoid reinfection.

3. Improper fertilization. During the growth period, the appropriate amount of top dressing should not be applied too much potassium.

Fertilizer, otherwise the leaves will turn black and fall off, water to dilute the fertility, turn the soil or change the culture soil.

Soil compaction:

Camellia. It is suitable for growing in fertile and loose soil, and the planting soil is compacted, which will lead to damage to the roots of camellias, and the leaves can not absorb enough nutrients, resulting in the phenomenon of drying up and falling.

Camellia leaves turn brown and dry and fall off, which may be caused by too much light. Camellia is suitable for growing in a sunny environment, too strong light will make the camellia leaves fall off, at this time the camellia needs to be transferred to a ventilated and cool place for maintenance, later maintenance, need to weaken the intensity of light, in the light is too strong to build a shade net.

Camellia leaves turn brown and fall off, which may also be caused by excessive fertilization. Camellia has a low demand for nutrients during the growth period, and too much fertilization will cause fertilizer damage to the camellia, resulting in dry and falling leaves. Pots need to be watered with plenty of water to dilute the fertilizer in the soil.

Camellia is suitable for growing in loose and breathable soil, and if the soil is compacted, the roots of the camellia will be damaged, and the leaves will not be able to absorb nutrients, and it will dry up and fall. In this case, you need to use a shovel to loosen the surrounding soil and improve the air permeability of the soil.

Notes:

1. Camellia should avoid strong light, so we must pay attention to sunlight when planting, and require sufficient light in spring and autumn, but in summer, we must avoid being exposed to direct sunlight, as long as the camellia is exposed to strong light for too long, it is easy to die.

2. Camellia is not cold-tolerant or heat-resistant, its most suitable temperature is 18-25 degrees, so the ambient temperature is not too high and too low, otherwise it will affect its growth, especially in winter, the indoor temperature must be above 3 degrees, if it is lower than 0 degrees, it will be frostbitten.

1. The black spots on the leaves of camellia may be infected with leaf spot disease, leaf spot disease is also a problem that many farmers have encountered, this is a disease that specifically harms the leaves of plants, the initial symptoms of the disease are black-brown spots on the leaves, and then slowly increase, expand to the surroundings, and finally more and more, and then grow the entire leaf, causing the leaf to die and fall off, and then infect other leaves.

2. Some lesions also have gray-brown and gray-white lesions. Most of the reasons why camellia will be infected with leaf spot disease are due to the air is too humid and hot, not ventilated, so that the bacteria have the conditions to breed, too much watering is also one of the reasons, once the water will cause the root system to rot, and the bacteria will take advantage of the weakness at this time to infect the plant. These pathogens can spread through many pathways, causing more leaves and plants to be infected with leaf spot.

Camellia likes sunlight when the light is too strong, but it can't tolerate strong light. In the summer, when the temperature is high, if you keep it in a location with strong sunlight, the leaves may be burned by strong light, causing the leaves to turn yellow and brown, and the leaves will dry up and fall off. In summer, it should be shaded in time to avoid long-term exposure to the scorching sun, and after careful exposure, it should be moved to a cool and ventilated place in time.

Second, the lack of water and fertilizer for the normal growth of camellia needs sufficient water and nutrients, sufficient water and fertilizer to promote the vigorous growth of the withered stead. Camellia likes to grow in a humid environment, and there is a certain demand for fertilizer, and when maintaining, if the watering and fertilization are insufficient, it will lead to poor growth and affected growth, thus causing the leaves to turn brown and dry and fall off. When camellia grows, it should be watered in time, keep the soil slightly moist, top dressing for camellia in time, and apply thin fertilizer to supplement nutrients frequently.

3. Root rot camellia is not only a lack of water and fertilizer, but also when watering and fertilizing too much during maintenance, it may cause damage and rot to the roots, so that it can not absorb water and nutrients normally in the later stage, and it will also lead to problems with the leaves. The amount of watering and fertilization should be controlled, and all the rotten roots should be cut off after rotten roots are found. Fourth, another reason for soil discomfort is that the soil is impermeable.

The emerald green leaves of twist flowers will fall because of seasonal changes or lack of moisture.

The surface of the camellia leaf, which is brown when exposed to sunlight. Camellias prefer semi-shady environments and do not like sunlight. If there are black spots on the leaves, it is possible that the leaf spot disease has been preceded. If the edges of the leaves turn brown and fall off, you are infected with anthrax.