Why does small leaved boxwood die? Does big leaved boxwood lose its leaves

The question you ask is vague and can cause its death for a variety of reasons, such as pests, diseases, and poor living conditions. Among the three sides, the living environment is the most basic and the most easily overlooked, among which the bad living environment includes:

Drought, waterlogging, lack of fertilizer, unsuitable temperature, environmental humidity, air content, etc.; Pest infestations are the simplest, because they are easy to see; The focus is on the disease, which is highly concealed and should be observed.

Small-leaved boxwood is not resistant to wind and cold, and it is easy to dry up in spring.

It is estimated that it has been caused by continuous high temperatures in the past few days.

The process of physiological dysfunction and destruction of tissue structure of plants under the influence of pathogens or unsuitable environmental conditions. Plant disease is an antagonistic symbiosis of the host plant and the pathogen; Its occurrence and prevalence are the result of interactions between host plants and pathogens. Diseases of crops and forests occur on a large scale, often causing serious losses to the country's economy and people's livelihood.

Some diseased crops can cause poisoning in humans and animals. Some high-quality and high-yielding varieties are often eliminated due to serious diseases. In addition to natural factors, the occurrence and prevalence of plant diseases are often related to human factors such as large-scale vegetation reclamation, blind hunting of biological resources, industrial pollution, and improper agricultural measures.

Plant diseases are divided into two categories: infectious and non-infective. The classification methods of infectious diseases caused by pathogens are: fungal, bacterial, viral and nematode diseases according to pathogens.

According to the host plant, it can be divided into crops, vegetables, fruit tree diseases and forest diseases, etc., and can also be divided into different crop diseases such as wheat, rice, cotton and so on according to the leaf epidermis of mandra. According to the symptoms, it can be divided into leaf spot, rot, wilting and so on. According to the location of the disease, it can be divided into root disease, stem disease, leaf disease, fruit disease, etc.

According to the mode of transmission, it can be divided into airborne transmission, water transmission, soil transmission, seedling transmission, insect mediator transmission, etc.

Big-leaved boxwood is a perennial evergreen shrub that does not lose its leavesIt is evergreen in all seasons, has good cold tolerance, and is suitable for growing in a semi-light environment, and is not good for full-light growth. It is often used for hedge seedlings, and can also be cultivated into shrub balls, which have good ornamental value.

Bigleaf boxwood can be cultivated in a variety of ways, such as cuttings, grafting, and strip propagation. Among them, cuttings are the main propagationAnd the memory lives.

Hard branch cuttings can be carried out in spring and autumn. Big-leaved boxwood can also be used for medicinal purposes, and because it is evergreen all year round, it can be picked all year round. It is done by cutting it off or drying the bark, indications:

Strong ossification and stasis, hemostasis and blood activation, rheumatic paralysis, bruises, swellings, fractures.

Big-leaved boxwood naturally likes a sunny environment, and is shade-tolerant, with more than 5 hours of light per day, and grows well in a semi-shady environment. Big-leaved boxwood is very cold-tolerant, the entire Yellow River Basin and Xinjiang, Gansu, Hebei, Northeast China can be planted, natural wintering in winter, tenacious vitality, rare evergreen plants in the north.

Big-leaved boxwood is an evergreen plant that does not lose its leaves.

No, it's an evergreen shrub in all seasons, but the normal peeling of old leaves doesn't count.

Take a closer look to see if there are any insect pests, the temperature is high in summer, the plant growth is not adaptable, there is a lot of rain, pay attention to drainage.

Large-leaved boxwood blightLarge-leaved boxwood wilt is a common and devastating disease of large-leaved boxwood in recent years, which is characterized by fierce onset, rapid infection rate, and great impact on greening effect.

Symptoms:At first, the upper leaves of individual branches lose water, and then the whole branch and the whole leaf branch lose water. In the later stage of the disease, the leaves are yellowish-white, and severe infection will lead to plant death.

The causative agent is Fusarium which is present in the soil. The germs mostly invade from root wounds, but can also directly invade plants. Generally, the onset of the disease begins in mid-May, and the peak of the disease is in July and August, and some plants do not exceed a week from the onset of disease to death.

Prevention and control measures:Irrigate the roots with 1500 times of ground color, and then spray with photosynthetic pigment + tetramycin 1000 times.

Evil mildew. Root irrigation was carried out with 600 to 800 times the solution of 80% oxazalin. Root rot: small-leaved boxwood.

When wilted due to blight and root rot, root rot can be used for treatment. Chlorothalonil.

When the plant is infected with downy mildew and viral disease, spray chlorothalonil every seven days. Maintenance method: Regularly apply rotted farmhouse fertilizer during the growing season.

1. Evil mildew

When the small-leaved boxwood wilts, it may be infected with leaf spot, leaf mold and other diseases, and it is necessary to irrigate the roots with 80% of the 600 to 800 times solution of oxazolin, and at the same time cooperate with the application of 2,000 times the liquid of ground color or 1,500 times the solution of strong seedlings, so as to prevent the occurrence of the wilting of the small-leaved boxwood.

2. Root rot

When the small-leaved boxwood is wilted due to blight and root rot, it can be treated with root rot, and in the process of applying pesticides, the soil is cultivated and weeded to ensure that the soil is loose and breathable, and the drainage is excellent, and then the root rot or ground color is watered for sterilization and disinfection, and the root is restored with the application of strong roots.

3. Chlorothalonil

Small-leaved boxwood wilting may be the cause of downy mildew and virus disease, in the early stage of the disease, spraying 75% chlorothalonil wettable powder 500 to 600 times the solution, spraying once every seven days, and using it two to three times in a row, can alleviate the phenomenon of plant wilting.

4. Maintenance management

In the process of maintaining small-leaved boxwood, timely watering to keep the soil moist, but can not appear waterlogged, in the growth period regularly apply well-rotted organic fertilizer or farm fertilizer, pay attention to the fertilization to take thin fertilizer diligent method, to avoid fertilizer damage, affect the normal growth of plants.

The causes of yellowing and drying of boxwood leaves are too low temperature, excessive watering, reduced light, and improper fertilization.

1. The temperature is too low

When cultivating boxwood, it is necessary to take cold and warm measures in time when encountering a low temperature environment, otherwise it is easy to cause the leaves to turn yellow and fall. If the temperature is lower than 0°C, it will also cause frostbite in the potting soil, and the cells of the plant will die one after another, and in severe cases, the whole plant will die. In response to this situation, some cold protection measures need to be taken.

If it is a home-grown boxwood, it can be moved indoors for maintenance.

2. Overwatering

Overwatering can also cause the leaves of boxwood to turn yellow. Overwatering can lead to water accumulation in the pot, which will further rot the root system of the plant and cause yellowing of the leaves. If it is in the growing season, it is necessary to appropriately reduce the amount of watering and reduce the frequency of watering, and it is best to choose a tile pot with good drainage for farming.

In winter, it is necessary to pay attention to reducing watering, otherwise it is not conducive to the growth of plants.

3. Reduce light

Sunlight is indispensable for the growth process of boxwood, and insufficient light can cause the leaves of boxwood to turn yellow. It is necessary to extend the sunshine time appropriately, and in summer and noon, it is necessary to shade at the right time, and avoid direct sunlight.

4. Improper fertilization

Boxwood likes fertilizer, but if the concentration of fertilizer applied is too high, it will cause the problem of burning roots and yellowing of leaves. If too little fertilizer is given to the boxwood, the lack of nutrients will also cause the leaves to turn yellow. For yellowing of leaves caused by high concentrations, it is best to move the plants to a new potting soil.

If the leaves are yellow due to insufficient nutrients, they need to be fertilized in time. In the process of breeding boxwood, we should pay attention to "thin fertilizer and more application", and must not apply thick fertilizer.