The tips of the potted kumquat leaves are yellow and wilted, the leaves are fine, and some of the le

1. Natural deciduous leaves.

Under normal circumstances, healthy kumquat is not defoliating all year round, it likes high temperatures, the optimal growth temperature is about 22-29, and the temperature below 8 degrees will cause leaf drop. If it is in the north, the old leaves of the kumquat tree are concentrated in the middle and lower parts of the branches, resulting in natural yellowing and falling, then it is not a big problem.

Solution: Daily maintenance of the heart, pay attention to cold and warmth, and new leaves will grow. If you find it unpleasant, just remove the yellowing kumquat leaves.

2. The soil is alkaline.

Kumquat is a plant that prefers acidic soil, and the alkalinization of potting soil can cause the leaves to turn yellow and fall off.

Solution: Replace the acidic soil, or replace the compacted or alkalized soil, and pay attention to the regular application of acidic dilution when watering in the north, so as to prevent the alkalizing of the potting soil and maintain a soil environment suitable for the growth of kumquat trees.

3. Stagnant water or drought.

Ponding in potted kumquat trees can easily lead to root rot, resulting in yellowing and leaf loss; When the weather is dry, the yellowing part of the leaves of the kumquat tree gradually develops from old leaves to new leaves.

Solution: Kumquat pot soil should be fertile and loose, good drainage, can not accumulate water, water when the surface of the soil is white, watering must be thorough, not only half of the water; When the weather is dry, pay attention to watering more.

4. Fertilizer damage or drug damage.

Too much or too little fertilization can lead to yellow leaves; In addition, after the kumquat tree is infected with pests and diseases, the concentration of the sprayed solution is too large, causing the leaves of the plant to turn yellow.

Solution: You can alleviate the pesticide damage by changing the potting soil, and pay attention to proper fertilization.

5. Element deficiency or pests and diseases.

Iron, nitrogen, zinc, manganese, boron, or red spider mites and other pests and diseases will cause the leaves to turn yellow and fall.

Solution: Apply targeted fertilizer or compound fertilizer, Bika water-soluble fertilizer, etc., and pay attention to the prevention and control of pests and diseases.

The leaves of the money tree are yellow and wilted, so the right medicine is prescribed, and the leaves are green in 15 days.

There are several reasons why leaves turn yellow.

1. Yellow because of flooding Due to excessive watering or too much rain, poor drainage and irrigation cause poor respiration and even rot of the root system. The symptoms are: the old leaves do not change much or darken, and the young leaves turn yellowish.

For this situation, the symptoms can be loosened and ditched and watering can be controlled. Second, because the cause of drought is characterized by the gradual development of yellowing leaves from old leaves to new leaves. This situation is generally caused by dry weather, soil surface runoff can not retain rainwater, etc. Third, it is caused by excessive fertilization or excessive concentration. It is characterized by the gradual yellowing and shedding of the old leaves, while the new leaves are thick and shiny.

Fourth, because of the lack of fertilizer caused by this includes two aspects: one is due to insufficient fertilization, soil compaction can be overcome by turning the soil in time and increasing fertilizer. Second, it is caused by the lack of light, which can be used to strengthen the light Fifth, the water in the north is alkaline, which is easy to make the leaves of trees yellow Sixth, the yellow leaves caused by pesticide damage After some plants are infected with pests and diseases, the concentration of the sprayed liquid is too large, causing the leaves of the plants to turn yellow.

The leaves of the money tree are dry and curled, and the locust is curled? Solve these 3 original Kaiming limb causes in a reasonable and timely manner, and quickly restore the world.

This is Shanrang imitation Hu cherry, also known as winter coral, Solanaceae plant, please refer to the encyclopedia for detailed maintenance of Qin macro method. Tan Shou Fiber.

There are yellow spots on kumquat leaves, what is this disease? How to do a good job in prevention and control?

This condition is actually canker disease, and once the fruit tree is infected with this disease, it has a great impact on the quality of citrus. Citrus canker is caused by pathogenic bacteria, which is generally concentrated when the temperature is suitable and the temperature is high, and it is more common in late spring and early summer, which will have a great impact on the leaves and fruits of citrus. At present, citrus canker disease is easy to prevent, but it is more difficult canker disease can occur from April to October, May is the peak incidence of spring shoots, the peak incidence of summer shoots is the peak of autumn shoots, and the incidence of fruits is high from June to early July.

This situation is actually a canker disease of citrus, and once the fruit tree is infected with this disease, it will have a great impact on the quality of citrus. Citrus canker is caused by pathogenic bacteria, which is generally concentrated when the temperature is suitable and the temperature is high, and it is more common in late spring and early summer, which will have a great impact on the leaves and fruits of citrus.

Canker disease can occur from April to October, with the peak incidence of spring shoots in May, the peak incidence of summer shoots in summer, the peak incidence of autumn shoots in January, and the peak incidence of fruits from June to early July. It can be said that it is very difficult to prevent and control citrus canker, and the task is long and heavy.

So how to prevent citrus canker disease, in fact, it is the same as huanglongbing, and it needs to be started from many aspects. Citrus canker and huanglongbing are both caused by bacterial infection, and it is very difficult to think about it, so it is necessary to solve it from the source.

First of all, when fruit farmers buy seedlings, they must ensure that the seedlings are reliable, and do not buy diseased seedlings, which will only continue to infect other fruit trees.

And when the spring shoots begin to emerge, it is necessary to pay attention to it, it is necessary to spray pesticides for prevention and control, as for what pesticides to fight, there are still many varieties, you can buy them when you go to the agricultural store, the key is to play pesticides in a timely manner and continue, after all, citrus canker disease is easy to be infected in 4-10 months, and it is necessary to strengthen management during this time.

Once it is found that the leaves are infected with citrus canker, it must be cleaned up in time, together with the weeds, fallen leaves, fallen fruits and peels in the garden, and the sporadic diseased plants are dug up, and burned intensively, and the canopy is carefully sprayed with Bordeaux liquid once after pruning.

At present, it is very difficult to get citrus canker once it is infected, and it has to fight with huanglongbing, and when you encounter citrus canker, fruit trees can only be pruned and cut down to spray.

Potted kumquat is cold and drought tolerant, is an evergreen vine shrub, with many branches, aerial roots at the stem nodes, palmate compound leaves alternate, and small leaves. Sheets, oblong-elliptic, dark green, petioles thin. The flowers are pale yellowish-green, blooming in autumn and winter, the berries are reddish-yellow, ripening in spring.

Suitable for garden landscaping or potted plants.

If it is a natural phenomenon of yellowing, just remove its leaves, don't worry too much. If it's too cold, you should move it inside. It is not good if the soil in the pot is too wet or too dry, so use breathable soil and water appropriately.

If you are sick, you can't use medicine that is too large.

As an ornamental plant with auspicious meaning, kumquat is often made into bonsai for ornamentation, and is deeply loved by many families. Especially during the New Year's holidays, many people will buy a pot of kumquat trees to go home. However, some people buy and do not maintain it properly, and there will be various problems, such as yellowing and falling leaves, falling flowers and fruits, etc.

So, do you know what causes kumquat bonsai to turn yellow and fall leaves? What should we do when we encounter this kind of problem? Uncle Gardener under Kumquat Bonsai will analyze the causes of yellowing and falling leaves of Kumquat Bonsai and how to rescue you:

1。Natural defoliation. Under normal circumstances, healthy kumquat does not lose its leaves all year round.

It likes high temperatures, and the optimal growth temperature is about 22-29. If the temperature is below 8, it will cause defoliation. If it is in the north, and the old leaves of the kumquat tree are concentrated in the middle and lower branches, causing the natural yellowing and shedding, then it is not a big problem.

Solution: Pay attention to daily maintenance, keep warm and cold, and new leaves will grow. If you think it's not good for viewing, remove the yellow kumquat leaves.

2.Soil Alkaline Kumquat is a plant that prefers acidic soil, and the alkalinization of the potting soil will cause the leaves to turn yellow and fall off. Workaround:

Replace with acidic soil, or replace hardened or alkalized soil. When watering in the north, pay attention to the regular application of acidic diluents to prevent alkalizing of the potting soil and maintain a soil environment suitable for the growth of kumquat trees. Kumquat potted plants are dry and stupid and yellow3, and the weather is dry, and the water or stagnant water of kumquat potted plants can easily lead to root rot, resulting in yellowing and leaf fall; When the weather is dry, the yellow part of the kumquat leaves gradually develops from old leaves to new leaves.

Solution: The soil of the kumquat pot should be fertile and loose, well drained, and should not accumulate water. When the soil surface is white, it should be watered thoroughly, not only half of the water; When the weather is dry, pay attention to watering more.

4.Too much or too little fertilizer or pesticide damage can cause the leaves to turn yellow; In addition, after the kumquat tree is infected with pests and diseases, the concentration of the spraying solution is too high, causing the leaves of the plant to turn yellow. Workaround:

You can change the potting soil to alleviate the pesticide damage, and pay attention to proper fertilization. The lack of elements causes the kumquat leaves to turn yellow. 5.

Elemental deficiencies or pests and diseases. Iron, nitrogen, zinc, manganese, boron, or red spider mites and other pests and diseases can cause yellow leaves to fall off. Workaround:

Apply targeted fertilizers or compound fertilizers, fertilizer water, etc. Posture and pay attention to insect prevention. Tip: If all the leaves of a kumquat are falling off, check to see if it's still alive.

The method of inspection is to cover the branches with nails. Peeling off the outer bark, the branches are green and full of moisture, indicating that the branches have not died. As long as it is properly maintained, there is still hope for it to grow leaves.

If the bark of the kumquat tree is green, but there is a lack of water, it is dead.

1. Under normal circumstances, healthy kumquat is not defoliating all year round, it likes high temperature, the best growth temperature is about 22-29, and the temperature below 8 degrees will lead to defoliation. If it is in the north, the old leaves of the kumquat tree are concentrated in the middle and lower parts of the branches, resulting in natural yellowing and falling, then it is not a big problem. 2. Soil alkaline kumquat is a plant that likes acidic soil, and the alkalinization of potting soil will cause the leaves to yellow and fall off.

3. Stagnant water or water accumulation in potted kumquat trees is easy to lead to root rot, resulting in yellowing and leaf loss; When the weather is dry, the yellowing part of the leaves of kumquat trees gradually develops from old leaves to new leaves. 4. Too much or too little fertilizer is applied to fertilizer or pesticide damage, which may lead to yellow leaves; In addition, after the kumquat tree is infected with pests and diseases, the concentration of the sprayed solution is too large, causing the leaves of the plant to turn yellow. 5. Lack of elements or pests and diseases Kumquat trees are deficient in iron, nitrogen, zinc, manganese, boron, or red spiders and other pests and diseases will cause the leaves to yellow and fall.

Kumquat defoliation control measures.

1. Kumquat should have sufficient sunlight, because any plant without light will have no photosynthetic nutrient production, no evaporation, no physiological cycle between branches, leaves and roots. Second, the watering of the growth period needs to be in line with the natural law of rain and rain, "not dry and not watering, watering is watering thoroughly" watering principle, wintering belongs to the dormant period due to small evaporation and less water, move into the room to absolutely control the watering, just keep it slightly moist, in order to prevent waterlogging and rotten roots. 3. Overwintering belongs to the dormant period that has stopped growing, and must not be fertilized; In the growth period should be used light slightly acidic organic fertilizer is appropriate, any plant balance lead substrate is afraid of thick fertilizer "burning roots" fertilizer is an inorganic neutral or alkaline fertilizer, long-term application will make the potting soil compacted, improper application is easy to burn the roots and die plants.

Fourth, in order to promote growth and more fruit, during the growth period, it is necessary to place it in a sunny place to receive more sunlight at the same time, and it is necessary to do a good job of shading the pot, so as to prevent the root system in the potting soil from exceeding 37 degrees in direct sunlight and heat stroke and dead roots.