How to treat the yellow leaves of persimmon plants? What s going on with persimmon seedlings and yel

1. The yellowing of persimmon plants is likely to be due to poor light transmittance.

The leaves of the persimmon tree are yellow and curly.

Persimmon trees need to grow with plenty of light and full light, especially if the foliage is too dense during the growth process, especially the canopy.

Part of the sun is blocked, resulting in no light in the lower part, which may be one of the reasons for the yellow and curly leaves of the persimmon tree, and the branches of the persimmon tree should be dredged in time to ensure a certain degree of permeability.

2. Lack of nutrients.

The leaves of the persimmon tree are yellow and curly.

The lack of nutrients in the growth process of persimmon trees will cause many problems, such as the amount of fruit hanging, persimmon quality, trunk growth, etc. will be affected, including yellow leaves and curly hair, which is a manifestation of lack of nitrogen fertilizer in the growth process.

3. Pest and disease disasters.

The leaves of the persimmon tree are yellow and curly.

Persimmon tree leaves yellow hair curls This is an abnormal phenomenon, which may be caused by internal factors or external interference, and the main pest and disease disasters of persimmon trees are anthracnose.

Horn spot, powdery mildew, etc., persimmon trees infected with these diseases will appear yellow and curly to a certain extent, and some agents can be used to prevent and control.

4. Too dry.

The leaves of the persimmon tree are yellow and curly.

If most plants are not watered for a long time, the soil surface will be lumpy and dry, and the leaves of the plant will be yellow and curly, and the body of the plant is not sufficiently watery, and the leaves will be very easy to yellow and curly after being exposed to the sun for a long time, so it is necessary to keep the soil moist during the maintenance process, so as to avoid problems with the leaves.

In view of the above points, it is generally possible to turn persimmon plants yellow.

1.Proper fertilization of the roots, 2Fertilize outside the roots, spray a mixture of 1% urea and potassium dihydrogen phosphate.

3.Cut down the tall miscellaneous trees next to them to improve the lighting conditions of the persimmon trees.

The persimmon tree is also called monkey jujube, vermilion fruit, the tree is relatively tall, and the varieties are diverse. It is mainly distributed in the central region of China, Shandong, Henan, Beijing, Jiangsu and other places, and the fruit generally ripens in September and October. The persimmon fruit has certain medicinal properties.

The persimmon tree belongs to one of the deep-rooted tree species, the adult persimmon tree, the root system is developed, the underground extension is deeper, in general, the fruit is more, the ability to resist diseases and pests is stronger, and it belongs to one of the five major fruits in our country.

The yellow leaves of persimmon trees may be caused by the following reasons:

The growth of the persimmon tree needs to have sufficient and comprehensive light, if the branches and leaves are too dense in the process of growth, especially the crown part of the tree will block most of the sunlight, resulting in no light in the lower part, this may be one of the reasons for the yellow hair curls of the persimmon tree leaves, and the branches of the persimmon tree should be dredged in time to ensure a certain permeability.

The lack of nutrients in the growth process of persimmon trees will cause many problems, such as the amount of fruit hanging, persimmon quality, trunk growth, etc. will be affected, including yellow leaves and curly hair, which is a manifestation of lack of nitrogen fertilizer in the growth process.

Persimmon tree leaves yellow hair curls This is an abnormal phenomenon, may be caused by internal factors or external interference, persimmon tree main pest disasters are anthracnose, horn spot, powdery mildew, etc., persimmon tree infection of these disease leaves to a certain extent will appear yellow hair curls, can be used some agents to prevent and control.

If most plants are not watered for a long time, the soil surface will be lumpy and dry, and the leaves of the plant will be yellow and curly, and the body of the plant is not sufficiently watery, and the leaves will be very easy to yellow and curly after being exposed to the sun for a long time, so it is necessary to keep the soil moist during the maintenance process, so as to avoid problems with the leaves.

The yellowing of the leaves of the persimmon tree is related to the topography, water and pests and diseases, the persimmon tree is located in a low-lying terrain, and the stagnant water cannot be removed in time, and the leaves will turn yellow. During the maintenance period, the persimmon tree lacks water and cannot grow normally, and the leaves turn yellow. During the growth period of persimmon trees, unrotted farm fertilizer is applied, and the leaves of fruit trees will turn yellow a lot after the leaf disease of rehmannia leaves.

1. Waterlogging.

Although the persimmon tree takes deep roots into the ground, if the persimmon tree is planted in low terrain and encounters heavy rain, the rain cannot be removed in time, and the groundwater soaks the roots for a long time, the persimmon tree will lack oxygen and the leaves will turn yellow. Therefore, persimmon trees should be planted on higher hills, and they can be drained in time in case of waterlogging.

2. Drought and water shortage.

Although persimmon trees are drought resistant, they are not conducive to the growth of persimmon trees in the arid and water-scarce north, and the soil moisture content directly affects the development of fruits. In the dry summer season, the persimmon trees should be watered every day, and artificial irrigation can be adopted in the northern region to fully provide the growth needs of the persimmon trees.

3. Yellow leaf disease.

Yellow leaves of persimmon trees can also be yellow leaf disease. Every year when fertilizing the persimmon tree, the rotten farmhouse fertilizer should be applied, if the application is the unrotted farmhouse fertilizer, the heat and organic acids are produced in the unrotted farmhouse fertilizer, the capillary roots of the persimmon tree are extremely unsuitable for this kind of growth environment, and will not absorb nutrients to continue to grow, and the persimmon leaves will turn yellow and the fruit will fall off. You can also choose to apply water-soluble fertilizer to supplement nutrients and enhance resistance.

4. Fruit insect hazards.

The fruit insects on the persimmon tree are mainly scale insects, which not only make the leaves yellow, but also affect the economic value of the fruit trees. The time to prevent scale insects from harming fruit trees is in the larval stage of scale insects, and the waxy hard shells on the appearance of adults can block the damage of pesticides, so pesticide insecticides are generally carried out around May.

Leaf blight, leaf susceptibility is mostly seen at the tip of the leaf or leaf margin, the lesion is brown, the edge is not obvious, the middle of the lesion is dark brown, the spot is connected into a strip, expanding from the tip of the leaf downward, so that the leaf is partially dead. It can be sprayed with 500 times of 25% carbon trane wettable powder, 800 times of 80% anthrax Fumei wettable powder, 1500 times of 50 Suklin wettable powder, difenoconazole, pyraclostrobin, flusilazole, etherstrobin, etc.

This may be a scale insect on the branches and leaves, similar to white spots, a lot, and the leaves will turn yellow when they grow, which can be killed and controlled.

Like ammonia poisoning. It may be ammonia poisoning caused by chicken manure in the shed!

The yellowing of the leaves of the persimmon tree is mostly caused by three reasons. One is the lack of water, although the persimmon tree has a certain drought tolerance, but if it cannot absorb water for a long time during the growth period, the leaves will appear dry and yellow. The second is poor permeability, pruning in time during the management period, if the branches and leaves are too dense, resulting in the bottom of the leaves do not receive light, the leaves will turn yellow after a long time.

Third, if you are infected with insect pests, you should spray and treat them as soon as possible to avoid the deterioration of insect pests.

Solution:1Spraying magnesium fertilizer: Foliar fertilizer containing magnesium can be sprayed to supplement nutrients for crops, and attention should be paid to spraying the lower leaves when spraying.

2.Spraying foliar fertilizer containing iron or zinc: Foliar fertilizer can be sprayed to supplement iron, mainly spraying the upper leaves.

The general process starts from discovering the problem and raising the problem, and after discovering the problem, make assumptions about the answer to the problem according to their existing knowledge and life experience Design the first plan, including the selection of materials, design methods and steps, etc. After reaching a conclusion, it is also necessary to reflect on the whole process of the general methodological steps of the experiment: asking questions, making hypotheses, making plans, implementing plans, drawing conclusions, expressing and communicating

The most commonly used methods in science include observation method, experimental method, investigation method and data analysis method

Observation is a basic method of science Scientific observation can be made directly with the naked eye, with the help of magnifying glasses, microscopes and other instruments, or with the use of cameras, video recorders, video cameras and other tools, and sometimes it is also necessary to measure Scientific observation should have a clear purpose; Observations should be comprehensive, meticulous, and realistic, and recorded in a timely manner; Be planned and patient; Think positively and record in a timely manner; To exchange views and discuss The design of the experimental protocol should be carried out closely around the questions and hypotheses raised When studying the influence of one condition on the research object, the experiment carried out under the same conditions except for the different conditions is called a controlled experiment General steps: find and ask questions; gather information related to the issue; make assumptions; design of experimental protocols; Conduct experiments and record them; analysis of experimental phenomena; Conclusion Investigation is one of the common methods of science When investigating, we must first clarify the purpose of the investigation and the object of the investigation, and formulate a reasonable investigation plan During the investigation process, sometimes because the scope of the investigation is very large, it is necessary to select a part of the survey objects as samples During the investigation process, it is necessary to record truthfully The results of the investigation should be sorted out and analyzed, and sometimes the statistical methods should be used to collect and analyze data is also one of the common methods of science There are many ways to collect information Go to the library to consult books and newspapers, and visit relevant people, The form of information includes text, **, data, and audio-visual data, etc., and the information obtained should be sorted out and analyzed, and answers should be found from it.

During tomato planting, especially in autumn, yellowing of leaves often occurs. Tomato leaf yellowing is very common, we should not be too alarmed, the main reason is temperature discomfort, improper fertilization, pesticide damage, virus disease, etc., as long as the temperature management, balanced fertilization, disease prevention and control in a timely manner, you can prevent the appearance of tomato yellow leaves, even after the occurrence, you can also take measures to prevent temperature discomfort, deep cultivation, spraying foliar fertilizer and other measures to remedy.

The reason why tomatoes have yellow leaves.

1. The temperature is too high and too low: the most suitable temperature for the growth of tomato plants is 23-28 degrees during the day and 13-18 degrees at night, and when the ambient temperature exceeds 30 degrees, the photosynthesis of leaves is significantly reduced. In July, the number of high temperature weather increases, and in such high temperature weather, if the ventilation work is not in place, photosynthesis will be greatly affected, and it is easy to cause yellowing of leaves.

In addition, if there is a sudden large drop in temperature, it will also cause the tomato to be harmed by low temperature and the leaves will turn yellow.

2. Improper fertilization: now many farmers do not know where to learn fertilization technology, feel that nitrogen fertilizer will cause growth, in the application of base fertilizer, simply apply phosphorus and potassium fertilizer, rarely apply nitrogen fertilizer, the consequence of long-term this is: tomato plant nitrogen nutrition is seriously insufficient, the supply of medium and micro nutrients is insufficient, resulting in a very imbalance in nutrition, and eventually causes yellowing of leaves and premature plant aging.

3. Pesticide damage: In the process of tomato planting, pesticide damage occurs almost every year, and the main manifestations are leaf shrinkage, leaf edge brittleness, gray and yellow leaf color, leaf deformity, etc.

4. Viral diseases: Under the high temperature conditions in summer, it is easy to induce the occurrence of virus diseases such as tomato mosaic leaves, fern leaves, striped spots, yellowing and curl leaves, and tomato plants suffering from viral diseases are bound to have premature aging, resulting in yellowing of leaves.

Precautions for tomato yellow leaves.

1. Appropriate temperature management: In tomato cultivation, we should pay attention to shading, ventilation and cooling, control the temperature in the field, and avoid the phenomenon of high and low temperature.

2. Balanced fertilization: nitrogen is the basic condition for the good growth and development of tomato plants, while phosphorus can promote flower bud differentiation and enhance root absorption capacity, and potassium can promote the rapid expansion of fruits. In addition, a certain amount of calcium, magnesium and other medium elements have a promoting effect on the growth and development, high quality and high yield of tomato.

Therefore, we must consider the reasonable combination of organic fertilizer and various nutrient fertilizers, and we must not apply a single fertilizer.

3. Avoid pesticide damage and prevent and treat viral diseases: When using pesticides to protect flowers and fruits, we need to pay attention to the concentration of drugs, the time of use, the parts of drugs, the flowering state and the number of times, otherwise it is easy to cause the leaves to be distorted and yellow. The key to the prevention and control of tomato virus disease is prevention, first of all, we must adopt disease-resistant tomato varieties, cultivate disease-free seedlings, avoid high temperature and drought, and timely prevent and control toxic pests in daily management.

Persimmon leaves cure cough and asthma, flatulence.

Persimmon leaf tea is a non-toxic diuretic, regular drinking can enhance the body's metabolism, facilitate urination, clear stool, purify blood, and revive the body's tissue cells. Used as a medicine, it can treat cough and asthma, flatulence, and various internal bleeding.

Nowadays, China has also begun to produce persimmon leaf tea, ** market. Because persimmon tea contains tannins and aromatic substances similar to those in tea, it also contains a variety of vitamins, rutin, fertilizer, protein, minerals, sugars and flavonoid glycosides.

Its dried leaves contain the most vitamin C, containing 3,500 mg of vitamin C in 100 grams of dried leaves. Drinking persimmon leaf tea often has certain curative effects on stabilizing blood pressure, lowering blood pressure, softening blood vessels, clearing blood and reducing inflammation, and can also enhance human metabolism, which is conducive to urination, stool, toothache, moisturizing, eliminating freckles, deodorizing and sobering up.