Why do tangerine leaves turn yellow and what to do, tree diseases and pests

Why do tangerine leaves turn yellow and what to do, tree diseases and pests

Homemade tangerine is a spectacular ornamental plant that is unpretentious. It can be grown on a windowsill and on a loggia - the main thing is that the room is well lit. The appearance and condition of the plant directly depend on care. Even minimal errors in maintenance can lead to illness. To understand why the tangerine leaves turned yellow, you need to know what can provoke such a reaction.

Why does the tangerine get sick?

Various factors act as a source of diseases in indoor mandarins. More often than not, the condition of the tree deteriorates due to improper care. The plant sheds its leaves when there is a deficiency or excess of moisture, lack of light, improper location, or lack of microelements. Temperature changes, high humidity, and drafts also have a detrimental effect on the condition of the tangerine. The possibility of a tree being attacked by parasites cannot be ruled out.

Mandarin diseases: signs and treatment

You can determine which disease has affected the tree by its external manifestations. The symptoms of most diseases are similar to each other, so identifying the pathology can be problematic.

Leaves become deformed and curled

The most common reason why leaves curl is an aphid attack. If insects are not visible on the trunk and green mass, moisture deficiency can provoke such a reaction.

Leaves are falling

If the tangerine has dropped its leaves in late autumn, there is no cause for concern, since this is how the plant prepares for winter.

If abscission occurs in spring or summer, the reaction is caused by the following reasons:

• dry air;
• inappropriate pot size;
• depleted soil;
• lack of lighting;
• transfusion.

If these reasons are eliminated, the tree will come back to life in a couple of weeks.

No flowering

More often, the absence of buds is caused by a lack of natural light. If the tangerine does not bloom in the spring, it needs to be provided with high-quality artificial lighting. This is enough for the formation of fruit buds.

Changing the color of the leaf plate

If yellow spots appear on the lower leaves of the plant, this indicates a nitrogen deficiency in the soil. Yellowing of the upper part of the crown indicates that the tree needs to be fed with urea. Such a reaction may be a symptom of chlorosis - iron deficiency.

Fruits and ovaries fall off

The most common reason why tangerines drop fruit is a viral disease. If underdeveloped fruits fall, this indicates a violation of the growing conditions: dry air, lack of lighting, improper watering.

Drying foliage

More often, leaves dry out due to overwatering or lack of moisture. If a brown border appears around the edges, the soil is waterlogged. To save the plant, it needs to be replanted, otherwise the root system will begin to rot.

A white coating appears

A similar symptom occurs when infected with mealybugs. Simultaneously with whitening, a sticky coating appears on the leaves, and foliage falls off.

The most common diseases: how to protect and cure tangerine

Like other plants, tangerine is susceptible to viral and bacterial diseases. Their development can be provoked by improper care, proximity to infected plants, or attack by pests.

Psorosis A or xylopsorosis

It is viral in nature. The main characteristic is damage to the cortex. When the disease occurs, the trunk of the plant becomes covered with dark red spots, the bark dies, and gum is released from the cracks. There are no treatment methods; the diseased plant is thrown out.

Sheet mosaic

Thin uneven stripes appear on the foliage, resembling strokes. Soon after the first symptoms, the foliage becomes deformed and falls off. Leaf mosaic cannot be treated.

Gommoz

This disease is often called gum disease. Its manifestations are similar to psoriasis A. Provoking factors include improper planting, lack of drainage, and injury to the root system. To save the plant, you need to treat the affected areas with a 3% solution of copper sulfate and cover it with garden pitch.

Tristeza

The first sign of the disease is a change in the shade of the foliage (they turn brown); as it progresses, the bark on the trunk begins to die. The disease also affects branches and fruits, they begin to crumble. Tristeza, like most viral diseases, has no cure.

The disease is bacterial in nature and cannot be treated. The main symptom of cancer in citrus fruits is the formation of dark red spots on the skin of the fruit and foliage.

Other problems and methods for solving them

In stressful situations and with improper care, tangerine leaves may not fall off, but change their appearance for the worse. The cause of the problem is judged by the way they look.

The leaves are drying

If the leaves turn yellow, curl inward and dry out, the reason lies in poor and infrequent watering or lack of lighting. In both cases, not only the greenery often dries out, but also the branches.

To correct the situation, resume normal watering of the tangerine. The pot with the tree is moved to a well-lit place.

Note! In summer, it is useful to place tangerines in the garden or on the balcony.

The tips dry out or the leaves turn yellow

If the tips of the leaves dry out, the problem lies in excessive watering. To correct the situation, do not water the plant until the soil is at least half dry. Then the tangerine is replanted or watered with a light pink solution of potassium permanganate.

The same symptom occurs in dry air. Regular spraying of the crown and installing an air humidifier in the room will help cure the tangerine.

The leaves turn yellow and become spotted if the plant is infected with spider mites or other pests. How to deal with them is described above. The reason often lies in illness.

The tangerine has dropped all its leaves

If absolutely all the leaves have fallen from a tree, this indicates an extreme degree of neglect of its condition. This can happen for any of the reasons described above, if the citrus grower has ignored the alarming symptoms for a long time.

Note! The tangerine will suddenly drop its leaves if the soil is too dry and then flooded.

What to do if the tangerine has dropped all its leaves:

1. It is placed in greenhouse conditions. To do this, put a bag on the tree and fix it on the pot. Air the tangerine every day, removing the bag for 15-20 minutes.
2. Every day, the crown and trunk of the tree are generously sprayed with a warm Epin solution.
3. At this stage, the plant is not watered. It is recommended to place a wet floral oasis, expanded clay or ordinary cotton wool soaked in water in the tray underneath.

The tree will remain in such conditions until shoots or leaves appear on it. After this, the plant is watered with the Kornevin solution and the duration of ventilation is increased.

When the leaves and shoots grow, dry branches and other parts of the plant are cut off. The cut areas are covered with garden varnish.

Mandarin diseases: why mandarin leaves turn yellow, dry out or fall off

When growing tangerines, various problems may arise, such as drying, curling, yellowing and falling of leaves, shedding of ovaries, shrinking and deterioration in the taste of the fruit.

Many diseases arise due to a lack of microelements in the soil, with a lack of light and moisture.

That is why you should choose the right location for the citrus tree, provide additional lighting if necessary, thus increasing daylight hours, water it in a timely manner, apply fertilizer, and take the tree out into the fresh air in warm weather.

Mandarin leaves are falling

Quite often you can observe that tangerine leaves fall off, but this phenomenon does not always indicate a plant disease. The tree can shed its leaves during the dormant period, which usually lasts from late October to mid-February. In this case, you need to place the tree in a cool room with a temperature of 14-17 ° C and reduce the number of waterings.

Leaves may also fall if the air is too dry. This can be observed in the summer and during the heating season. In this case, you should spray the crown daily, and place a container of water near the pot, this will help humidify the air near the tree.

The cause of leaf falling can also be improper replanting, when the root collar is buried in the soil, or the citrus is planted in a pot that is too large. It is necessary to eliminate these shortcomings and observe the plant. If the leaf fall has not stopped, you should look for another reason.

In addition, the leaves turn yellow and fall off when there are drafts in the room, excessive soil moisture, or lack of light.

Mandarin leaves are turning yellow

Many gardeners are faced with the fact that tangerine leaves turn yellow. Most often, the reason lies in a lack of minerals. So, with a nitrogen deficiency, first the lower leaves of the citrus tree turn yellow and gradually all the others.

To replenish nitrogen in the soil, nitrogen mineral fertilizers are used, for example, ammonium nitrate or ammonium sulfate, or organic fertilizers. With a lack of iron, the leaf blade becomes light yellow in color, and the disease chlorosis develops.

Chlorosis first affects young leaves, then spreads to old ones. To prevent this disease, the plant is treated with iron chelate once a month.

Yellowing of the plate can be caused by insufficient lighting or a too cramped pot. The problem can be solved by transferring the plant to a larger pot with fresh, nutritious soil.

Why does a tangerine turn yellow?

Another reason why a tangerine turns yellow may be an invasion of spider mites. The pest attacks the leaf blade and sucks the juices from the plant, which leads to yellowing and falling of the leaves. To see spider mites, you should use a magnifying glass. If this pest is present, you need to wipe the plant with a soapy solution.

To prepare it, add a small amount of laundry soap to warm water, make a thick foam, then use a cloth or cotton swab to wipe the leaves and stems of the citrus with the foam. This removes the tick and its oviposition.

Before processing, it is recommended to rinse the wood in the shower. After this procedure, most of the insect will be washed away. The next day after soap treatment, the remaining soap is washed off in the shower. After 2-3 days, re-treatment is carried out. To completely destroy spider mites, it is necessary to carry out 3 treatments of the tree with a soap solution. The place where the affected tangerine stood is thoroughly washed.

Mandarin leaves are drying up

Sometimes it happens that tangerine leaves dry out and then fall off. If a dry brown crust has formed on the edges of the leaf blade, the reason is excess moisture in the soil. In this case, the tree should be replanted in fresh, breathable soil with a predominance of leaf soil and good drainage. If rotten roots are found during transplantation, they must be removed.

Often citrus leaves dry out due to lack of moisture. You can revive a sick plant as follows. Place the pot in a bowl of water at room temperature so that the water is flush with the edge of the pot.

After this, you need to start watering the soil from above. When the soil is completely wet and stops bubbling, drain off the excess water. Then spray the tree with Epin at the rate of 1 ml per 2 liters of water. Spraying is carried out 2 times a week.

This method will allow you to revive even a very dried out plant.

How to save a tangerine tree

If the problem lies in repeatedly flooded soil, watering is temporarily stopped. When the soil dries, the tree is dug up and the root system is inspected for diseases and damage. Then the tangerine is transplanted into new disinfected soil. At first, it is recommended to water it not directly, but by pouring water into a tray under the pot.

If the soil dries out for a long time, you should not immediately water the tangerine abundantly. Water is poured into the pot little by little, taking 2-hour breaks between waterings. After two days, they begin to water the tangerine according to the correct pattern.

Normalize the temperature in the room. The plant is placed on a southern windowsill. Other bugs are corrected.

After eliminating the cause of leaf fall, the mandarin is resuscitated. This process consists of the following steps:

1. The tangerine is covered with a bag, the edges of which are fixed on the pot. This will help create the greenhouse conditions necessary for the plant to recover. The package is removed every day for 15-30 minutes.
2. It is advisable to temporarily remove the tree from the windowsill. Instead, a phytolamp or luminescent device is placed next to it, which should work for at least 12 hours.
3. Every day the plant is sprayed with Epin solution. Once a week, add “Kornevin” to the water for irrigation.

Such conditions are provided to the tangerine until new leaves begin to appear. After this, the frequent use of growth stimulants is stopped, and the duration of ventilation is increased, gradually completely dismantling the greenhouse.

To speed up the growth of green mass, fertilize with nitrogen (ammonium nitrate). It is also recommended to add superphosphate and potassium salts to the fertilizer.

When the young leaves become larger, the tree is watered with a solution of microelements or a multicomponent fertilizer prepared according to a folk recipe.

Causes of the disease

During the dormant period, leaves curl and fall.

It must be said right away that the leaves of indoor tangerines fall off quite often, and this does not always indicate disease. The most common reason for leaf drop is that the plant has gone dormant. What can I do to stop the leaves from falling? You need to move the tree to a room where the temperature is cooler, and also reduce watering and stop applying fertilizers, and if you apply them, then in small quantities. This period usually begins in late autumn and ends in late winter or early spring. Those people who have had an indoor tangerine in their house for many years already know its “habits”, and therefore take the tree to a cool place in advance and avoid the fact that too many leaves fall off.

Leaves can fall for the most banal reason that every gardener should know about: the plant is simply hot, the air in the room is dry. If it is not possible to move the plant to a colder place, then you need to spray the leaves and crown of the plant from a sprayer daily, or better yet several times a day, in order to create additional air humidification. Next to the pot or tub where the tree sits, you need to place a basin or bottle of water. The water will evaporate, which will create additional humidity in the air. The soil in the pot should not be allowed to dry out. Typically, the period when the air is too dry and the plant requires additional care occurs in the summer and during the heating season in winter.

The reason that the leaves of an indoor tangerine fall off may also be that the plant was replanted incorrectly. Therefore, it is worth remembering whether the transplant was carried out recently? What mistakes can be made when transplanting indoor tangerines? First of all, an inexperienced gardener may plant a tree too deep in the soil, but this should not be done. Or perhaps a small plant was placed in a pot that was too large for it. If the plant has indeed recently been replanted and there is a risk that it was done incorrectly, then it must be replanted again, observing these requirements. And if everything is done correctly, the leaves should stop falling.

Very often, “leaf fall” is caused by the fact that the plant lacks potassium in the soil. In order to replenish it, you need to buy a special fertilizer called potassium nitrate. You need to ask for it at the flower shop, carefully study the instructions and apply it in a timely manner.

The leaves of an indoor tangerine may turn yellow and fall off because there are often cold drafts in the room where it stands, or because the plant is flooded and does not need as much moisture. In addition, this can happen because the plant is not provided with the additional lighting it needs.

Mandarin at home, care and photos.

Temperature.

Spathiphyllum leaves turn black and yellow: why and what to do
Caring for indoor tangerine is not difficult. It is better to place purchased tangerine seedlings and plants grown from seeds near the south or east window of the apartment. Tangerines love bright, diffused light, and shade the plant only from the scorching rays of the sun. For normal development, an indoor tree needs an air and soil temperature of at least +16-20 degrees in the warm season and about +12-15 degrees in winter. The need to keep tangerines in winter at low temperatures is due to the growth characteristics of the tangerine tree: if the plant is not provided with a cool winter, most of the flowers will be infertile.

Lighting.

In winter, the home tangerine needs additional lighting, for which they use a regular phytolamp, but gradually accustom the tree to additional light, otherwise the plant will become stressed and may shed its leaves. In summer, it is advisable to take the tangerine tree out into the open air, to a place protected from drafts. On hot days and during the flowering period, the air should not be overheated: this can lead to wilting of flowers and dropping of fruits, and direct sunlight can cause burns to the leaves.

An important feature of growing tangerines is the one-sided illumination of the plant. Any citrus trees should not be frequently rotated or moved from place to place, as they get used to lighting from one side

Otherwise, the metabolism of nutrients is disrupted, which leads to massive falling of tangerine leaves, and sometimes to the death of the plant.

How to water a tangerine?

In summer and spring, homemade tangerines are especially demanding of moisture, so the tree should be watered every other day. In winter, watering tangerines is reduced to once a week. Water for irrigation must be settled or passed through a kitchen filter, and before watering, make sure that the water is warm.

Air humidity and spraying.

Air humidity is very important for indoor tangerines, so in winter the tree is sprayed once a day, but only if the air in the apartment is very dry. In summer, tangerines are sprayed several times a day, and there should always be a container of water next to the plant. When spraying a fruit-bearing tree, make sure that water does not get on the flowers.

Photo by: Chris.urs-o

Tangerine transplant.

Young trees need annual replanting; for this, turf, leaf soil and sand are used in a ratio of 2:1:1. After the tangerine tree begins to bear fruit, it is replanted once every 2-3 years, increasing the width of the pot by 4-6 cm. It is not recommended to replant adult and large specimens; you just need to carefully remove the top layer of soil and add fertile soil.

Feeding.

Intensive feeding of indoor tangerine is carried out from March to September, when vegetative and generative buds develop. For this, a complex mineral fertilizer with a high content of nitrogen, phosphorus and potassium, as well as mullein manure diluted with water in a ratio of 1:10, is suitable. Mandarins should be fed once every 10 days, alternating fertilizers. In winter, the plant only needs one feeding per month.

Stimulation of fruiting.

Often, homemade tangerines grown from seed need to stimulate fruiting: if the tree has not bloomed 5-6 years after planting, take a small piece of copper wire and wrap the trunk just above the root collar so that the wire strongly compresses the bark. The movement of sap will be disrupted, and the tree should “think” about bearing fruit.

After 6 months, the wire is removed and the damaged area is covered with garden pitch. The method will work if the tree has overwintered in a cool room, and its crown is sufficiently formed and has shoots of the 4th and 5th order.

Caring for tangerines during the flowering period.

Caring for a tangerine tree during the flowering period involves increasing phosphorus and potassium fertilizing and reducing nitrogen fertilizing. Usually the tangerine itself regulates the number of ovaries and sheds the excess ones, but 1 fruit for every 15-20 leaves is considered a feasible load; it is better to remove the remaining flowers and ovaries. Cracking of ripening fruits is observed in 2 cases: if the tree is not watered regularly, or if excess nitrogen has formed in the soil.

Crown formation.

Selected varieties of tangerines do not require crown formation. The shoots of a tangerine tree grown from a seed are pinched, and the fruiting shoots with heavy fruits are tied to supports.

Photo by: Sebastien Tricoire

Preventative measures for lemon disease and pest damage

The main measure to prevent lemon diseases is to create familiar conditions for growth and vital activity. Before you start planting indoor lemon, you need to familiarize yourself with the rules for growing it and be prepared to follow them carefully. This capricious plant does not forgive even seemingly insignificant deviations from the rules and reacts to them with deterioration in health. So, let's list the basic important rules:

• Maintaining optimal heat and humidity conditions. The plant feels better in the temperature range of +15-22 °C, but if you give it a rest in the winter, the temperature should be reduced to +10-12 °C. Lemon also does not tolerate sudden temperature fluctuations. The plant reacts negatively to dry air - its humidity must be maintained at 75-85%. To monitor this parameter, it is better to get a hygrometer. Based on these conditions, you need to follow a number of rules: Do not place the plant near heating appliances.
• Moving lemon from room to room, from room to street and vice versa should occur at times when the temperatures are approximately the same. The increase/decrease in temperature should be as smooth as possible.
• To increase the humidity level, use humidifiers or place wide containers of water in the room.

What citrus plants are afraid of, mistakes in care, biological characteristics of citrus plants

First of all, it is necessary to take into account the biological characteristics of citrus plants. In winter they need relative rest.

From October to February, the room temperature should be no more than 12°C. However, this time coincides with the heating season, and high temperatures lead to untimely growth and depletion of plants, which will subsequently affect fruiting.

Early spring is also a critical period

, when warm days suddenly give way to a sharp cold snap. At the same time, the growth that has begun slows down sharply, the leaves become deformed, and the buds and ovaries fall off. To avoid this, it is recommended to maintain the room temperature at 14-16°C.

Sometimes in the summer, gardeners take plants out onto the balcony or even transport them to the dacha, but it is better not to do this, since citrus fruits react painfully to any changes and adapt very slowly

to new conditions.
Overdrying and excessively moistening the earthen coma
is also a very common mistake. In the first case, active roots die, leaves curl and fall off along with flowers and fruits. With excessive watering, the roots rot and the leaves turn yellow.

It is best to pour water into the pan - then the substrate is evenly saturated with moisture and nutrients are not washed out. The most moisture-loving citrus fruit is lemon, the most drought-resistant is orange. Plants are often watered with very warm water (40°C), which causes the roots to die. You can't go to extremes. When watering with cold water, the roots damp out and the plants also die. The water temperature should be 2-3°C, and during fruiting 5-10°C above room temperature.

Remember that the roots of citrus fruits are located in the top layer of soil, so you need to loosen it carefully and water it often, but in small doses. Light conditions are also very important for successful cultivation.

Heavy shading leads to the formation of large, dark green leaves and depleted plants. Direct sunlight causes leaves to turn pale, burn fruits and ovaries, and cause them to drop. Lemon is the most shade-tolerant, orange is light-loving and heat-resistant

Light conditions are also very important for successful cultivation.

. Heavy shading leads to the formation of large, dark green leaves and depleted plants. Direct sunlight causes leaves to turn pale, burn fruits and ovaries, and cause them to drop. Lemon is the most shade-tolerant, orange is light-loving and heat-resistant.

They love citrus fruits

diffused sunlight, it is best to place them on a window facing the southeast or southwest. And remember: the higher the temperature in the room, the more intense the lighting should be. Dry indoor air causes great suffering to citrus trees - the tips of the leaves dry out, the buds, ovaries and fruits fall off. To avoid this, wash and spray your plants regularly. If the pot is located near the battery, then place a container of water on it, which will saturate the air with moisture as it evaporates.

Background of leaf fall

A few months ago I was happy with the acquisition of an adult and very beautiful citrus -. It came with ripe fruit, which I picked for tasting. At that moment I was very alarmed by the wet “heavy” soil, which seemed to have been taken right next to the store. However, after several days of acclimatization, he not only did not show any discomfort, but also gave a good increase in . The flowers successfully set fruit and the plant as a whole made me very happy.

The only sad thing was that along with the plant in this store I also purchased a formidable pest - . After discovery, the tree was immediately moved to a new location so as not to endanger the entire collection. And then the problems began: 1-2 leaves flew off per day, which looked healthy, and only upon careful examination was a slightly yellowed vein visible.

There was no massive leaf fall, but the leaves gradually fell over the course of several weeks. I associated all this with a change in living conditions and a pest. But when I stopped noticing the scale insect for a long time and acclimatization was about to be completed, I began to worry, but could not guess what was the reason for the falling leaves on the citrus tree.

Wartiness: how to identify and get rid of it

This tangerine disease is also caused by a fungus. First, yellowish spots appear on the leaves, in place of which warts of a gray-pink hue form. Young branches are the first to suffer; the growths grow greatly, causing the shoot to die. If wartiness affects the fruits, they become covered first with orange spots, then brown. The ovary quickly falls off. The infection actively develops due to increased air humidity.

To get rid of the disease, damaged areas of the tree are cut off and burned. If this is not done, the fungal spores will spread to other plants. Mandarin is sprayed with a 1% solution of Bordeaux mixture from a spray bottle: in March, after the tree has flowered and in July.

Improperly fertilizing your lawn

The lawn needs to be fertilized twice a year: in the spring (at the turn of March and April), in the summer (in June, then in August, no later than the first half). Before fertilizing, the lawn should be mowed, and fertilizing should be done on a cloudy day, when the grass is not heated by the sun . Preferably before it rains. If, as a result of fertilizing and despite regular care, the grass becomes drier and drier every week (over the entire surface of the lawn or locally), you have probably made one of three mistakes:

Insufficient fertilizer

As a result, the lawn is malnourished because too few of the essential minerals responsible for grass growth and development reach the root layer: nitrogen, phosphorus, potassium, magnesium and calcium.

Nitrogen

It stimulates the growth and development of stems. This minimizes the risk of weeds. In addition, it increases the resistance of grasses both to diseases and to damage, trampling and exposure to adverse weather conditions (for example, drought or heavy rain).

Phosphorus

Phosphorus is especially useful for the development of the root system. It improves air circulation in the deeper layers of the substrate and the flow of water and minerals to the roots of the grass. In addition, it immunizes the lawn against pathogenic bacteria and fungi.

Potassium

Increases the turf's resistance to adverse weather conditions. In spring, summer and autumn, potassium protects the lawn from frost, trampling, drought and prolonged intense rains. In winter, minimizes damage caused by frost or heavy snow.

Magnesium

It is found in chlorophyll, a natural plant pigment. Thanks to it, the grass turns green throughout the lawn, it is free of the unsightly yellow color.

Calcium

Improves the condition of the soil, reduces the acidity of the substrate. Increases its permeability, so that water, oxygen and nutrients needed by the grass for proper growth and tillering freely reach the root zone.

Too much fertilizer, uneven distribution of fertilizer on the lawn

Excess nutrients burn the stems. This is evidenced by spots of yellow, dried grass that appear on the lawn (over the entire surface or locally in case of uneven application of fertilizers).

In both cases, the best solution would be to frequently (every 2-3 days) and very abundantly water the lawn - about 10 liters per 1 m2 - in places where unsightly spots appear. A large amount of water quickly dissolves the fertilizer, helping it penetrate into the deeper layers of the soil. As a result, the lawn will quickly restore its good condition and impeccable appearance.

Water your lawn throughout the day. Preferably in the morning. When the sun is at its zenith, you should not water the grass or any plants growing in the garden. Drops of water act like lenses - they focus the rays on each other, so fragile and already quite damaged leaves can be burned. In the evening, intensive watering is not recommended. Prolonged moisture makes the stems more susceptible to fungal diseases.

Composition of tangerines

Tangerines are a storehouse of nutrients. They contain vitamins, microelements, phytoncides and organic acids.

The nutritional value

The average weight of a tangerine without peel is 100 grams. This mass accounts for 38–40 kcal (depending on the variety) and 7–8 grams of carbohydrates, the main part of which are monosaccharides. There are almost no proteins and fats. If you do not overuse the fruit, it will not harm your figure.

Fiber content: 2 grams. It is not digested, but while it is in the stomach and intestines, it absorbs toxins and lipoproteins (substances that can be stored in fat), and then removes them from the body. Fiber is also useful because it improves the functioning of the gastrointestinal tract and prevents constipation.

Vitamins and microelements

Tangerines contain many vitamins and microelements, but most of all they contain the following substances:

• vitamin C (110% of the daily value);
• B vitamins: B5 (11%), B1 (10.5%) and B9 (10.5%);
• silicon (52%);
• potassium (16%);
• calcium (9%).

Vitamin C is an excellent preventative against colds: influenza, ARVI. It’s not for nothing that people are so eager to eat tangerines in winter, when there is no opportunity to eat fruits grown in the gardens of their native country. In addition, vitamin C is a natural antioxidant. It protects cells from free radicals and therefore helps prevent cancer and slows down the aging process.

B vitamins, which tangerines are rich in, have the following beneficial properties:

Vitamin B1 protects the nervous system from stress, overwork, stimulates mental abilities and memory.

Vitamin B5 is involved in metabolism and protects the mucous membranes of internal organs. With a lack of this element, the skin becomes sluggish and ages quickly.

Vitamin B9 (folic acid) affects the production of blood cells

A very important substance for women. Doctors recommend taking folic acid in the first trimester of pregnancy and during painful periods

You can get natural vitamin B9 from tangerines.

Silicon increases the strength of bones, teeth, cartilage, and makes blood vessels elastic. Potassium is an element that the soft tissues of the body need: blood vessels and capillaries, muscles, glands. It has a positive effect on the functioning of the heart and brain. Calcium is involved in maintaining healthy bones, hair and nails, and fights cholesterol.

Thus, the benefits of tangerines for the body are beyond doubt. In winter, they will be an excellent alternative to vitamins from the pharmacy.

The most common diseases: how to protect and cure tangerine

Like other plants, tangerine is susceptible to viral and bacterial diseases. Their development can be provoked by improper care, proximity to infected plants, or attack by pests.

Psorosis A or xylopsorosis

It is viral in nature. The main characteristic is damage to the cortex. When the disease occurs, the trunk of the plant becomes covered with dark red spots, the bark dies, and gum is released from the cracks. There are no treatment methods; the diseased plant is thrown out.

Sheet mosaic

Thin uneven stripes appear on the foliage, resembling strokes. Soon after the first symptoms, the foliage becomes deformed and falls off. Leaf mosaic cannot be treated.

Gommoz

This disease is often called gum disease. Its manifestations are similar to psoriasis A. Provoking factors include improper planting, lack of drainage, and injury to the root system. To save the plant, you need to treat the affected areas with a 3% solution of copper sulfate and cover it with garden pitch.

Tristeza

The first sign of the disease is a change in the shade of the foliage (they turn brown); as it progresses, the bark on the trunk begins to die. The disease also affects branches and fruits, they begin to crumble. Tristeza, like most viral diseases, has no cure.

Cancer

The disease is bacterial in nature and cannot be treated. The main symptom of cancer in citrus fruits is the formation of dark red spots on the skin of the fruit and foliage.

Preventive actions

To prevent blackcurrant leaves from starting to turn yellow in early spring or summer after fruit formation, gardeners recommend carrying out a number of preventive measures that will help avoid problems.

Timely pruning of blackcurrant bushes is important when carrying out preventive measures. This method solves several problems simultaneously:

• forms a blackcurrant bush;
• eliminates the possibility of fungus appearing on damaged, diseased branches that must be removed;
• helps prevent thickening of plantings, which often leads to the appearance of insect pests.

Sanitary pruning is carried out in early spring, after the plants emerge from wintering, and also in late autumn, in preparation for further covering of the bushes. Summer pruning is corrective in nature.

A small tree trunk circle is formed around the blackcurrant bushes. This helps to properly mulch the soil around the trunk, as well as adjust the watering technique. Gartering bushes is considered one of the important preventive measures.

This applies to varieties with spreading lower branches to prevent them from falling to the ground. Supports are installed around the bushes and tied with synthetic nylon ropes in a circle. The lower branches, which become heavier after the berries appear, are placed on the rope.

A good preventive measure against situations where the blackcurrant bush turns yellow is to warm the plant with boiling water in early spring. This method helps eliminate fungal residues and insect particles that froze in the winter but remained on the branches. In addition, boiling water activates the flow of cell sap along the trunk and awakens the plants.

Warning! Treatment with boiling water is carried out in early spring, long before the first buds swell.

Pests

Homemade lemons are also sometimes affected by pests. They also cause yellowing of the crown.

Spider mite

Spider mite
Spider mite is a small pest that settles on the underside of leaves and forms spider cocoons there. Typically, indoor lemons are affected by the red variety. To better examine the tick, use a magnifying glass.

The pest feeds on the juices of young leaves and shoots. The plant begins to suffer from dehydration and nutrient deficiency. Photosynthesis is disrupted, which causes yellowing of the crown. Premature leaf fall is observed. Without timely treatment, the plant dies.

To save a lemon tree, use one of the following methods:

1. Insecticides. The tree is sprayed with chemicals, for example Funanon. Such products are dangerous not only for pests, but also for people. Therefore, the fruits after processing are not eaten,
2. Soap solution. In 5 liters of water dilute 0.5 pieces of laundry soap and 1 tbsp. ash. The product is sprayed onto the crown of the plant.
3. Hot pepper infusion. 5 pods of hot pepper are ground in a meat grinder, pour in 3 liters of water and leave for 3 days. The composition is filtered and used for spraying.

Shields

Scale insects are another dangerous pest. The insect larvae fixate on the trunk, branches and leaf veins of the lemon and feed on the sap of the plant, as a result of which the leaves begin to turn yellow and wither. Massive leaf fall is observed.

Before starting treatment, the wood is washed in the shower. In the process, they try to remove harmful insects.

After this, the wood is wiped with kerosene diluted in a 1:1 ratio with water. The procedure is carried out at least 3 times with an interval of 7 days.

Aphid

Aphids are one of the most common pests of domestic citrus fruits. These are small winged and wingless insects. They settle on shoots and leaf blades in entire colonies.

Aphids reproduce quickly and feed on plant sap. The tree begins to suffer from a lack of fluid and nutrients. The leaf blades begin to turn yellow and curl. Sticky formations form on them, onto which sooty fungus attaches.

The diseased lemon is washed in the shower with warm water. Try to remove all pest colonies.

Aphids are easily removed using folk remedies. Therefore, citrus growers try not to use chemicals.

Folk remedies for fighting aphids:

1. Soap and tobacco solution. Add 0.5 kg of tobacco to 5 liters of water. The mixture is infused for a day, then filtered. 40 ml of liquid soap is added to the resulting infusion.
2. Orange peels. Half the jar is filled with orange peels. The rest of the volume is filled with water. The mixture is infused in a dark place for a week. Then filter and dilute with 2 parts of water.
3. A decoction of bitter herbs. Boil 0.5 kg of wormwood in 5 liters of water for half an hour. The broth is allowed to brew for a day, then filtered and used for spraying.

Mealybug

The mealybug is white in color and settles on the underside of the leaf in large numbers, so it is not difficult to notice the pest.

The affected parts of the plant are covered with a white coating. Then they turn yellow and curl up. Gradually they begin to dry out and fall off.

To get rid of the pest, the lemon tree is washed under running water. The affected parts of the plant are torn off. The tree is sprayed with insecticides.

Nematode

Nematodes are small worms that live in lemon stems. They feed on the sap of the root system, leading to its destruction.

The pest cannot be seen with the naked eye. It can be detected when the problem has already reached significant proportions. In this case, the leaves of the plants turn yellow and curl. Then they fall off. Ultimately the tree dies.

To remove pests, the lemon is removed from the pot. The roots are washed with warm water. Then they are treated with insecticides or a solution of copper sulfate.

After this, the plant is transplanted into a new pot. The soil is pre-disinfected.

Taken measures

Geranium leaves turn yellow, starting from the edges, and the buds fade: why does the flower dry out and what to do?

I realized that the matter would definitely not end with a simple transshipment. I had to free the roots from bad soil, but in the center there was an incomprehensible mixture, similar to fossilized clay with sand, which could not be gotten rid of so easily:

The picture is scary, isn't it? I still don’t understand how, with such a state of the root system, the tree not only did not die, but also tried to produce growth and bear fruit.

To remove the fossilized clay, I had to soak the roots in water for half an hour, adding four caps of the Rooter preparation (). I don’t have anything else, but at least it didn’t interfere with such a kumquat resuscitation.

While the soil was soaking, I prepared a light soil mixture consisting of leaf humus and chernozem in a ratio of approximately 4:1:

Who would have thought that a tangerine could be grown from a seed? Nevertheless, the tree rose up, spread its leaves, and began to lay its first fruits. Like all house plants, tangerines can be susceptible to diseases. In today's article you will learn why tangerine leaves turn yellow and what to do.

Mandarin is a citrus plant. It can be safely grown at home, where the tangerine feels comfortable. The tangerine tree is easy to care for. It is not afraid of minor temperature changes, since it is very hardy and can be placed on window sills in northern regions.

Why do tangerine leaves turn yellow?

• Lack of minerals
• Bad light
• Dry air (winter or summer)
• Previous state of rest
• Large / cramped pot
• Spider mite

The main reasons why tangerine leaves turn yellow lie in improper care of the plant at home. Changing weather can cause disturbances in the plant's nutritional system.

Lack of minerals

Tangerine leaves turn yellow if the tree lacks minerals. Often there is a deficiency of nitrogen components in the soil mixture. Yellowing of the leaves begins at the bottom of the green mass, after which it spreads throughout the tree.

How to compensate for nitrogen deficiency:

• Ammonium nitrate
• Ammonium sulfate
• Organic fertilizers

To prevent nitrogen deficiency in the future, tangerines are treated with iron chelate once a month.

Poor lighting of mandarin

Mandarin is a plant associated with warm weather, sun, and a light Mediterranean breeze. For homemade mandarins, it is also necessary to create conditions close to their natural habitat. Moderate lighting, good location (south-eastern, eastern windows) and additional lighting if necessary will help restore tangerine leaves that have turned yellow.

Dry indoor air

The problem of dry air can occur in winter or summer. In winter, when the heating devices are turned on, the tangerine suffers from an excess of dry air. It is necessary to move the tree to a suitable location. In summer, it is advisable to increase watering frequency or use the spraying method.

Unsuitable pot for tangerine

Mandarin leaves turn yellow at home if the grower has not chosen a suitable pot. Too big - the tangerine does not receive enough nutrients, perhaps the soil is eroded, the plant sags. A small, cramped pot for a tangerine - the root system dies.

Spider mite on a tangerine

The tangerine tree can be affected by spider mites. First of all, the lower leaves on the tree are affected, after which the higher ones turn yellow. It is necessary to carefully examine the back of the leaf to determine if there are spider mites.

How to deal with spider mites on tangerines:

• Prepare a soap solution
• Moisten a cotton pad
• Wipe the stems and leaves of the plant
• Rinse off with a warm shower
• Repeat treatment after 3 days

Mandarin's dormant period

The tangerine tree enters a dormant state for the winter, so if its leaves begin to actively turn yellow and fall off, perhaps the reason is precisely in preparation for wintering. There is no need to worry - reduce watering, stop feeding, move to a moderately warm, semi-shaded place, and let the tangerine tree rest.

A tropical plant that has long since turned from exotic to native - tangerine - when grown at home, requires even more careful care than in the natural environment. But even with the highest quality care, many owners are perplexed why the tangerine leaves fall off, although they do everything right. To find the reason, you should study all the features of keeping citrus trees.

Homemade tangerine leaves may begin to dry out and fall off

Reasons for the falling leaves of indoor tangerines

The fall of greenery in tangerines is a rare phenomenon . If several leaves have fallen off the tree, but the crown has not thinned out, there is no need to worry. The lifespan of each sheet plate is 3 years. Then they fall off, and new greenery grows in their place.

Slight leaf fall can be observed in the fall, usually in November, but this also will not affect the density of the crown. This phenomenon is associated with the cyclical life of the plant.

If leaves fall in large quantities, the plant is inspected for infections and pests, and the growing technology is changed. This problem indicates errors in care.

Note! Mandarin is an evergreen plant. Heavy leaf fall should not be observed even in the cold season.

Unsuitable growing conditions

Indoor citrus fruits are demanding in terms of growing conditions. In an uncomfortable climate, they begin to shed their leaves and turn yellow. The cause of this problem is the following unfavorable factors.

Low or high temperature

For tangerine, room temperature (+20...+22°C) is considered the most comfortable, but the indicators can vary within +18...+26°C. If the temperature is below +2°C, the tree freezes, loses its leaves and dies. At temperatures below +15°C, the plant enters a dormant state, in which it will remain for several months. If, with the arrival of spring, the temperature does not rise to comfortable levels, the tree will begin to shed its leaves. At temperatures above +30°C, the tangerine crown will dry out.

Temperature changes

Sudden temperature changes are detrimental to tangerines. The problem arises if you take the tree outside from the apartment, bring it back into the house, or send it for the winter without first hardening it. To avoid leaf drop and other symptoms of stress, the plant is brought into new conditions gradually, increasing the time it stays there every day.

Malsecco: what causes the disease

If kept indoors, tangerines can contract this infection during the winter months. The disease manifests itself in the fact that the leaves of the plant become dull, begin to fall off, the branches become orange in color, and gradually dry out. The tips of the shoots dry first, then these changes move closer to the trunk, and then move to the base. Mandarin cannot be cured. Phoma tracheiphila Petri spores are easily spread by the wind and land on plants and garden tools.

The beautiful, but very delicate tangerine plant is often susceptible to infections, especially fungi. Diseases affect both individual parts of the tree and the entire plant. It is important to recognize the disease in time and take measures to save the tangerine.