After citrus planting, the leaves are seriously yellowed, how can they turn green?

After citrus planting, the leaves are seriously yellowed, how can they turn green?

The organ in which the leaves are most sensitive to drought.

When citrus is short of water, the leaf response is the most obvious, generally water stress more than 4-5 hours, the leaves will curl, when the drought is severe, citrus leaves will not only curl, but also may fall leaves. However, it can be alleviated by watering and other methods, and it is not recommended to apply fertilizer with too high concentration when the drought is severe, and it is recommended to drench water first and then supplement fertility. After a period of drought, the sugar orange tree itself lacks the trace elements that carry out photosynthesis, and the leaves begin to turn yellow.

In this way, even if the farmer has replenished the sugar orange tree with water, it is necessary to fertilize it again to increase the trace elements in the orange tree.

The effects of drought on the root system.

When the root system is short of water, the root cells are damaged, and the branches can not grow, and when the drought is severe, the root absorption function will be damaged, and the root system will also be limited in the absorption of mineral nutrients and water at this time, and the damage to the tree body is greater at this time, which may cause the death of the entire tree.

In the fruit veraison period, the appropriate veraison is conducive to the crust of citrus color and sweetness, but the drought is excessive, but it is not conducive to the fruit veraison sweetening, the sugar content is difficult to improve, if the citrus begins to drought from the expansion period, the fruit is difficult to expand, this year in some places sugar orange, mandarin orange fruit is relatively small, which is not conducive to the improvement of fruit quality in the later stage, after all, the fruit is too small, and it is difficult to sell well.

Drought creates other problems.

When the drought is severe, it may cause difficulties in citrus flowering, reducing citrus production, some people say that drought is good for promoting flowering, and it is indeed possible in the short term, but long-term drought is not conducive to promoting flowering.

How can I remedy it?

Timely irrigation is conducive to citrus water replenishment, retaining some grass is also conducive to storing water sources, spraying potassium dihydrogen phosphate is conducive to improving drought resistance, for citrus trees that have been yellowed, you can apply 1-2 sea elves in real time to repair the root system, of course, the premise is to find ways to replenish water.

It is very likely that the plant lacks nutrients, and nitrogen and potassium fertilizers should be supplemented in time to promote the growth of plant rhizomes, and appropriate watering should be used to keep the soil moist. After a while, it should turn green.

Syndrome differentiation and treatment is the most effective method, and the yellowing of citrus leaves is nothing more than related to disease, insects, fertilizers and water hazards.

How to solve the yellowing of citrus leaves?

1. In terms of diseases, the pathogens that cause leaf yellowing are confirmed, and the pathogens of leaf yellowing usually appear as huanglongbing, yellow vein madness, leaf crushing, split skin disease, atrophy disease, root rot, gum disease, nematode, etc.

2. In terms of insect pests, the pathogens that cause leaf yellowing are confirmed, and the pathogens that usually appear leaf yellowing are red and yellow spiders, scale insects, longhorn beetles, etc.

3. In terms of fertilizer damage and nutrient deficiency, fertilizer damage caused by excessive fertilization (ammonium poisoning, high soil salt concentration) is usually the main reason for leaf yellowing, and the growth and development of branches and leaves caused by insufficient supply of various nutrients are stunted.

Fourth, in terms of moisture, the continuous abnormal high temperature causes an imbalance in the water supply of citrus. In the same way, rain will also cause soil moisture to be too wet and cause damage, and the lack of oxygen in the soil after continuous rainfall will lead to abnormal root metabolism and root rooting.

Written by: Qian Yongyan (Meishan Youth Entrepreneurship Mentor).

The best way to turn green is to graft, through a special way and some plants grafted, you will find that it will not be yellow, and it will grow very green, very strong.

The establishment of disease-free nurseries in citrus orchard production areas and the cultivation and planting of disease-free seedlings are the primary measures for the prevention and control of citrus huanglongbing. The establishment of disease-free nurseries should be selected in areas where there is no occurrence of citrus psyllids, if the seedlings are raised in the diseased area or in the area where citrus psyllids occur, it is necessary to pay attention to the selection of places where citrus plants are not planted within three kilometers, and it is best to use net sheds to raise seedlings.

Etiolation.

Yellowing is a general term for the phenomenon of green and yellowing of the leaves during the growth of citrus, and its appearance marks the beginning of the decline of the tree.

Yellowing is an adaptation of plants to the environment. When seeds or other persistent organs germinate under the dark-free soil layer, the limited amount of organic nutrients can be used most effectively for the elongation of the hypocotyl or stem, ensuring that the seedlings can see the light when they are unearthed. People often use the method of shading to produce yellowed seedlings as food, such as leeks, garlic and bean sprouts, etc., which are tender and delicious because of the lack of cellulose.

Causes of yellowing of citrus

First, the soil is unsuitable.

Yellowing of citrus can be caused by soil discomfort. Severe soil compaction and poor air permeability will hinder root respiration, so that the leaves are prone to yellowing. In this case, it is necessary to loosen the soil frequently to increase the aeration capacity of the soil.

It is also necessary to fertilize it regularly to ensure that it is well nourished, so that it can recover faster.

Second, the lack of elements.

Citrus requires a lot of nutrients during the growth period, especially various elemental fertilizers. If nitrogen fertilizer is lacking, the leaves tend to turn yellow and the leaves become thinner. It should not be nitrogen fertilizer in time to ensure adequate nutrition.

If there is a lack of calcium fertilizer, the leaves and veins will turn yellow, and calcium fertilizer should be applied appropriately. Fertilizer treatment should be carried out according to different growth conditions.

Yellowing is a general name for the phenomenon of leaf loss and yellowing in the process of citrus growth and development, and its production means the gradual decline of plant type. After the beginning of autumn, the phenomenon of citrus autumn yellow will follow, because the photosynthesis efficiency of yellowing trees will decrease sharply, which will lead to weak autumn shoots and difficult to expand citrus fruits, and will also harm the production of flowers and fresh fruitsIf it can't be corrected immediately, it will be very complicated. This time, let's talk about the common factors that cause citrus autumn yellow and the corresponding improvement countermeasures, in order to give some help to orange friends.

Nutritional deficiency is the root cause of the nutrient consumption of citrus spring shoots to veraison most of the links come from the nutrient accumulation of last year's tree stems, after entering the autumn shoot puffing link, the previous inventory commodities have long disappeared, and this period of tapping, puffing fruit, long roots will produce greater nutrient consumption, so it is not filled as soon as possible, <>

From the past work experience, it seems that the proportion of nutrient imbalance in various citrus is actually higher. For example, after the fruit is gradually expanded, "V" yellow dots appear on the leaves around the fruit, that is, the magnesium deficiency is more serious; After the autumn shoots spread their leaves, the yellowing of the new shoots is caused by calcium deficiency; If the new shoots gradually turn yellow from the leaf and expand to the leaf edge, the probability of calcium deficiency is high. Although many farmers chased the autumn shoot puffing fruit fertilizer, but because only the balanced fertilizer or high potassium fertilizer was supplemented, ignoring the filling of medium and trace element fertilizers, this measure aggravated the lack of calcium, magnesium and other elements, so in the fertilization, the effective application of nutrients is very important, at the same time, it should also be integrated with leaf topdressing, zinc source bank, etc., to improve fertility.

Once damaged, the versatility will be blocked, and the lack of nutrients will lead to secondary damage to the root system, and finally fall into a vicious circle, this kind of tree is more difficult to get than pure nutrient deficiency, and the field is more accompanied by the yellowing of petioles or the coexistence of a variety of nutrient deficiency syndromes. There are many factors that lead to citrus root damage, rain and waterlogging roots, drought and dry roots, fertilizer and burning roots, unreasonable ring cutting of hungry roots, pests and roots are all possible, in the correction, we must first identify the cause, reduce the coercion, and then repair the roots and raise the roots, from the source to solve the difficulties.

Yellowing is a general name for the phenomenon of leaf loss and yellowing in the process of citrus growth and development, and its production means the gradual decline of plant type. Yellowing is a kind of integration of green plants into the natural environment. When seeds or other persistent human organs germinate under a dull soil layer, the limited amount of organic chemical trophic chemicals can be used most effectively for the extension of the hypocotyl or stemBao Xiaomiao unearthed cultural relics to see the light.

The common way to block light is to produce and manufacture yellowed seedlings as food, such as leeks, garlic and bean sprouts, etc., which are tender and refreshing because of the lack of fiber.

This is actually the yellowing phenomenon of citrus, and the root cause is caused by insufficient nutrition.

In the process of citrus growth, a large amount of nutrients are sucked away from the tree, and all the nutrients are basically supplied to the citrus, and the tree will gradually show signs of weakness, so the leaves will gradually turn yellow.

The phenomenon of green and yellow leaves is usually due to insufficient nutrient intake or insect infestation, and these two causes can be investigated.

Summary. Hello, glad for your question. Causes and treatment methods of citrus leaves losing green and yellowing: the causes of yellow leaves of citrus trees.

1. Causes of insect pests. 2. Causes of diseases. 3. Nutrient reasons. 4. Lighting reasons. Citrus tree yellow leaf treatment method.

1. Insect infestation.

1) After the citrus is harvested, the dead and diseased branches are taken out of the orchard in time and incinerated to reduce the number of insect eggs in the orchard. At the same time, according to the specific insect pest, choose the appropriate insecticide for control, and use a whitening agent to coat the trunk around May.

Citrus leaves lose their green and turn yellow.

Hello, glad for your question. Causes and treatment methods of citrus leaves losing green and yellowing: the causes of citrus tree yellow leaves 1, the causes of insect pests.

2. Causes of diseases. 3. Nutrient reasons. Ridge 4, light cause.

Citrus tree yellow leaf treatment method 1, insect noise bridge attack 1) After the citrus is harvested, the dead branches and diseased branches are taken out of the orchard in time and incinerated to reduce the number of insect eggs in the orchard. At the same time, according to the specific insect pest, choose the appropriate insecticide for control, and use a whitening agent to coat the trunk around May.

2) Citrus psyllid: avermectin, cyfluthrin, bifenthrin, thiamethoxam, acetamiprid, and imidacloprid, sulfoxapyr, nano mineral oil and other agents can be used for prevention and control, generally 1-2 days before the beginning of the adult period, and re-medication after 7-10 days. (3) Citrus longhorn beetle:

From June to August, inspect the trunk, and when foamy material is found, scrape it off with a knife, and then apply 5 times the solution of trichlorfon or Nongwan sulfur mixture to prevent larvae from burying the xylem. If the larvae have been bored into the wood, use cotton dipped in 80% dichlorvos EC or 40% dimethoate EC 5-10 times and stuff it into the worm hole. (4) Red spider:

You can use 20-250 times of 99% mineral oil (forbidden in high temperature season), 1000-1500 times of 2% avermectin, and 2000 times of 57% gitete for control. (5) Scale insects: In the peak stage of young larvae, use 1000-1200 times of 40% quick-culling EC or 800-1000 times of 48% Lesben EC for control.

If it is not the yellowing caused by citrus huanglongbing, it should not be a big problem, find the cause of yellowing and solve it, so that citrus can regain its vitality. Anzhou Sannong people try to analyze from the following aspects for reference.

Now there are more citrus plantings, and many of them have begun to be planted in the mountains, we have gone to see a lot of orchards, the water source has not been well solved and hurriedly planted, and the weather is dry and not drenched in time, which is also easy to cause yellowing of the leaves of new plants. The solution, of course, is to find a way to get drenched.

There are also many fruit farmers who are planted in paddy fields, or planted in relatively low-lying places, which are easy to accumulate water, and long-term water accumulation, the growth and development of tree roots are stunted, and it is also easy to cause yellowing of seedlings. The solution is to raise deep ditches to remove stagnant water and improve soil permeability.

Different soil qualities have different levels of trace elements, and the lack of trace elements will also lead to yellowing of citrus leaves.

Yellowing due to the lack of a trace element is also relatively common. In the case of boron deficiency, yellow spots begin to appear in the young leaves at the beginning, and then slowly begin to yellow. If there is a lack of iron, the leaves become thinner and yellow. Others, such as lack of zinc, are also prone to cause yellowing of leaves.

The solution is to supplement the soil structure, which can be improved by increasing organic fertilizer, and the fastest way is to spray the microelement fertilizer on the foliar surface. If boron is deficient, borax can be sprayed two to three times.

3.Yellowing caused by huanglongbing.

This is the most worrying problem, and it is also the most feared problem in citrus production at present. Now there are more occurrences of huanglongbing in different production areas, which should be paid enough attention.

Everyone knows that there is no cure for citrus huanglongbing, and the only way is to dig it up and burn it as soon as possible.

After planting, the seedlings have huanglongbing, most of which are caused by the seedlings with poison, and it is recommended to buy detoxified seedlings from the standardized virus-free seedling farm when planting.

This phenomenon is known as yellowing, which marks the beginning of a decline in the number of oranges, and is an adaptation of the plant to the environment.

This phenomenon is called yellowing, which is a general term for the loss of green and yellowing of leaves during the growth of citrus, and its appearance marks the beginning of the decline of the tree. Seeing this phenomenon, it is necessary to take corresponding measures.

Collectively referred to as "yellowing". It is a unified name for the decline and yellowing of the leaves of citrus tree species.

The leaves of citrus are only yellow, if it is caused by the lack of a certain nutrient element, you can fertilize reasonably, and supplement a certain nutrient according to the situation. If it is caused by excessive fertilization, it should be avoided to apply thick fertilizer or raw fertilizer, and excessive fertilization or excessive fertilization should be watered in time to promote dilution. If it is caused by infection with pests and diseases, it is necessary to take measures in time**.

If the temperature in the environment is low, you need to take warm measures, cover with straw or water antifreeze water.