Causes and treatment of homemade lemon diseases. Causes of Lemon Diseases

It must be remembered that this is enough tender plant, which can cause a wide variety of diseases.
There are many various diseases, which can affect citrus fruits. In this article, we will look at various viral diseases of lemons and their symptoms. Viral diseases manifest themselves as spots on the leaves of lemons and tangerines, slowing down the growth and development of plants or dying off the bark.
And if it is still possible to cure infectious diseases and parasites, then, unfortunately, there is no cure for viral diseases.

Causes of viral diseases of lemons

First of all, it is worth understanding how the infection of a lemon occurs. This will correct errors in the maintenance of your tree and prevent re-infection.

Among the causes leading to diseases, the following can be distinguished:
- weak immunity of the plant after previously transferred diseases;
- illiterate content (incorrect watering, pruning, temperature regime, lack of light and mineral nutrition);
- poor quality soil;
- location next to other diseased plants;
- insects that can carry various viruses;
- summer ventilation, as a result of which various viruses or fungi can be introduced (but the likelihood of this is very small).

Unfortunately, almost all viral diseases of lemons are incurable. Therefore, if you notice the symptoms of one of them, it is better to get rid of the diseased plant as soon as possible.

Consider possible viral diseases of citrus fruits.

Psorosis a, or xylopsorosis

Xylopsorosis virus is a dangerous virus that infects the bark of lemon stems. It can be in a latent (that is, at rest) state for about 10 years. Therefore, you may not even know that your plant is infected with this virus.
In terms of symptoms, this disease resembles gommosis, so novice citrus growers rarely manage to identify it in their lemons.

Xylopsorosis by external sign manifestations is identical to simple gommosis, but at the same time it is very dangerous for the plant

Xylopsorosis is not treatable, so an infected lemon will have to be disposed of.

Tristeza

It is a disease caused by the Tristeza virus of the same name. In an infected tree, the bark of the trunk dies off. It affects the whole plant. Young trees under the age of 5 years are most susceptible to this disease.
The virus infects the entire plant. initial symptoms this disease are growth retardation and fruit shrinkage.

Diseases homemade lemon can cause a lot of trouble, and sometimes even lead to the death of the plant if the problem is not treated in time.

Need to know possible diseases indoor lemon to prevent its death

The reasons

Lemon diseases can be caused by a number of reasons:

Weakened immunity, which is caused by improper care.
Poor quality, unsuitable soil can become fertile ground for the appearance of pests.
Infection of a houseplant from the street - if you take flowerpots outside in the summer.
Insects that are carriers of various infections.
Diseases already carried by the plant can cause new ailments.

Disease symptoms

One of the common diseases of domestic lemons is aphids and scale insects.

The first affects the leaves of the plant or penetrates the soil. Aphids can be transmitted through other plants that are near the lemon. You can bring it into the house yourself with a bouquet of wildflowers. Shchitovka falls on lemon leaves as a larva. The adult is already immobile. It sticks to the stem of the plant or the veins on the leaves.

Often found among citrus fruits such a pest as spider mite. He is able to destroy all the green leaves and lead the lemon to death. Such diseases affect the leaves if the tree is young, weakened, or when special lemon pests appear that affect only it.

The fight against them can be long, but quite successful, if a chemical or home-made preparation is correctly selected for a room lemon. They can also be used for preventive purposes.

In most cases, lemon diseases are associated with a violation in the recommended care. This plant needs a lot of attention. To avoid leaf disease, it is necessary to monitor a stable temperature, sufficient illumination and rational watering.

By balancing these three factors, it is possible to prevent a large number of cosmetic defects of the plant, which do not belong to a serious disease, but spoil the appearance.

Yellowed and fallen leaves.
No fruiting.
Dropping the formed ovary.
Drying of branches in winter.

Bacterial diseases are much more difficult to treat. It is recommended to entrust the chores to specialists who will help your plant quickly cope with the disease.

Illnesses not related to nursing

Specialists distinguish between diseases that are inherent in citrus plant varieties. Among them, you can find those that are very difficult to eliminate on your own.

Direct consultation with a specialist is desirable, who can visually look at the affected lemon and advise a suitable drug, it can be Bordeaux liquid, phytosporin, hydrogen peroxide (substances containing alcohol are prohibited), copper sulfate as a fungicide and other drugs.

Lemon diseases:

The leaves are uneven, punctately pigmented - leaf mosaic. Not to be confused with chlorosis, in which the edges of the light spots are fuzzy.
Brown or yellow spots, with hardened plaques inside, quickly affecting the entire plant - bacterial cancer citrus fruits.
Two species of aphids are known lemon pests. From the usual green, which is difficult to confuse with another insect, the basal aphid is white in color, and its habitat is in the ground.
The gradual death of the tree, the leaves are the first to be affected, they dry first, then the entire branch, and the fruits are covered with red-brown generalized spots - "Anthracosis".

Prevent lemon diseases at home such as tristeza, root rot and melseko is possible if you provide the tree from the very beginning with a stable place and diffused, bright sunlight.

If the leaves begin to turn yellow, first of all you need to remember when the last watering was, measure the temperature in the room, remove drafts (many tropical and subtropical plants cannot tolerate them) and contact a specialist if there is not enough experience in recognizing the problem.

A room lemon is a living creature, so it may have problems. The troubles that happen with a lemon can be divided into three groups: proper care, pests, diseases.

📌 Wrong care

✔ Non-compliance with the rules of plant care (watering, lighting, temperature, lack of nutrition, transplanting and violation of the pH balance of the soil). With insufficient watering, the tree dries out, with excessive watering, yellowness of the leaves appears and the root system rots.

✔ The lack of one or another trace element can be determined visually. With a lack of iron - a leaf that has a saturated green color, first becomes “speckled” (green and yellow spots alternate), then fades, turns yellow and dries.

✔ With a lack of phosphorus, the leaves become earthy-rusty in color, the tips of the leaves dry out. With a lack of potassium, the leaves wrinkle, forming "wrinkles" and folds.

✔With a lack of manganese and boron, the ovaries fall off. Correcting the situation is much more difficult than watering a lemon in time with special fertilizers for citrus fruits.

📌 Lemon pests and how to deal with them

✔ Shields and false shields (larvae are hidden by a dark brown shield). In their presence, the leaves fall off, the branches dry up, the plant slowly dies. Pests must be cleaned (with a toothbrush or a sharp stick), rinse the lemon with soapy emulsion. You will learn about another way to deal with these pests from the video.

✔ Spider mite (red citrus mite). The larvae are located on the underside of the leaf, the leaf in this case is shrouded in cobwebs, which gradually envelop the entire plant. Leaves become discolored, dry and fall off, flowers and fruits are damaged. Spider mites are more likely to appear when the air in the room is dry. In case of damage by a spider mite, you can spray a lemon with a 0.15% Aktelik solution. Spraying will have to be repeated three times with an interval of 10 days.

✔ Mealybug (larvae and females feed on the entire aerial part). If they are present, sticky secretions of a mealybug appear on the surface of the leaves, later the leaves dry out, spots and cracks form on the fruits. The fruits, not ripe, fall off. The plant must be periodically inspected and mechanically destroyed the larvae and females of the mealybug.

✔Citrus aphid ( small insects black or yellow-green). Paralyze the tops of young shoots. If they are found, it is necessary to spray the lemon with a 0.15% Aktelik solution. Spraying will have to be repeated three times with an interval of 10 days. To prevent aphids from appearing, you can put a pot of fragrant geraniums next to the lemon.

✔Thrips (looks like a black line on the leaves, so small). They crap more than suck the juices from a plant, they can fly, they spread viruses. To destroy them, you need to wash the tree from the shower (cover the soil with a film) and treat it with a soapy emulsion.

✔ Whitefly (white small moth). The larvae are greenish-white in color, located on the underside of the leaves. Getting rid of them is quite problematic. In this case, the lemon is sprayed with insecticides at least 5 times every 3 days.

📌 Indoor lemon diseases and how to treat them

✔ Indoor lemons can suffer from many diseases caused by fungi, viruses, bacteria and mycoplasmas. The result of their impact is a variety of spots, ulcers, rot, wilting, growths, growths, etc. Harmful microorganisms spread with the help of insects, water drops during spraying and irrigation, wind.

✔ Symptoms of damage to indoor lemons by bacteria and fungi are similar, but with an infection caused by fungi, along with increasing spots, fungal spores are visible on them - gray bloom, brown pustules or black dots of sporulation.

✔ Diseases most often appear on weakened plants, so it is important to properly care for lemons at home, pest control, cutting out the affected parts of the plant, with cutting sections (you can activated carbon). It is better to immediately remove all flowers, buds and fruits from a diseased lemon so that they do not weaken the plant.

✔ To suppress many pathogens and for prevention, it is effective to use the Fitosporin biological product (the drug is non-toxic, odorless). They are sprayed and added to the water for irrigation according to the instructions. It is possible to carry out 2-3-fold spraying with a 1% solution Bordeaux liquid.

✔ Anthracnose - the most common disease of lemons, caused by a pathogenic fungus. With anthracnose, the buds fall, the leaves turn yellow and fall, reddish spots appear on the fruits, the branches die off. It is necessary to cut dead shoots and carry out the treatment described above.

✔ Scab (citrus wart) is also a common disease of a fungal nature. In this case, small transparent yellowish spots appear on young leaves, turning into warts. pink gray. Warts grow over time, forming a growth, in the future the shoot dies. Orange spots appear on the fruits, increasing in size, they become red-brown in color, the ovaries fall off. The affected parts of the plant must be cut and burned, the crown of the lemon should be sprayed with a 1% solution of Bordeaux mixture.

✔Homosis (gum disease) is manifested by longitudinal brown-red spots on the branches and trunk of a lemon. The bark in these places gradually dies off, a sticky golden liquid flows out of the cracks, which solidifies in the air.

There may be several reasons for this disease: deep planting of seedlings, non-disinfected soil, lack of drainage, excess nitrogen, lack of phosphorus and potassium, mechanical damage, too high humidity.

For the treatment of homosis, it is necessary to find out the cause of the disease and eliminate it. The affected areas on the trunk must be cleaned sharp knife, cutting out the affected areas, disinfect with a 3% solution blue vitriol and cover the wounds with garden pitch. Treatment of the wound is recommended to be carried out several times, until complete recovery. Affected thin branches are best cut and burned.

✔ Sooty fungus can settle on a lemon when infected with scale insects, mealybug. In order for it not to appear, it is necessary to deal with pests in a timely manner.

🔎Inspect the lemon more often, so you will notice pests and diseases at an early stage. Timely measures taken will not cause much harm to the lemon.

The most common and very dangerous for citrus fruits is a pathogenic fungus, sickening anthracnose - it affects branches, leaves, and fruits. Anthracnose causes plant bud drop; the leaves turn yellow and also fall off; reddish spots appear on the fruits; branches die.
Measures to combat anthracnose: it is necessary to cut dead shoots and carry out the treatment described above; in the future, follow the rules for caring for citrus plants.

Citrus wart - this disease is also caused by a pathogenic fungus that affects young shoots, leaves, citrus fruits. On young leaves, small transparent spots appear at first. yellow color, and then these spots turn into pinkish-gray warts. Warts appearing on young shoots gradually grow, forming a large outgrowth, and can cause the death of the shoot. Orange spots appear on citrus fruits, which increase in size and turn red-brown; ties fall off. The development of this disease is facilitated heat in the room and high humidity air.
Measures to combat wart: pruning and burning the affected parts of the plant. The crown of citrus fruits is sprayed with a 1% solution of Bordeaux mixture. The first spraying is carried out in March, the second - after flowering (in June), the third spraying - in July.

Citrus gommosis, or gum disease, appears as longitudinal brown-red spots on the trunk and branches of citrus plants. The bark in these places gradually dies off, and a sticky yellowish-golden liquid, gum, solidifies in air, flows out of the cracks.
There can be several reasons for this disease:
- planting too deep (citrus seedlings should not be buried during transplantation); the soil is disinfected with a 1% formalin solution before planting);
- lack of drainage (when a disease appears, it is necessary to stop watering for 2-3 days, and then water citrus fruits with a large limitation);
- excess nitrogen with a lack of phosphorus and potassium (do not water the plant with slurry and reduce the dose of nitrogen application);
- mechanical damage.
Measures to combat gommosis: first eliminate the cause of the disease.
Carefully clean the wound, disinfect it with a 3% solution of copper sulfate (30 g of copper sulfate and 100 g of quicklime or 200 g of slaked lime are dissolved in 1 liter of water) and cover the wound with garden pitch.
Treatment of the wound is repeated several times until complete recovery. If the plant cannot be cured, it is burned.

Cancer of citrus - Bacterial disease. It appears on the fruits and leaves in the form of dark brown, bright spots. It is impossible to cure.

Late blight - Trees grafted onto an orange suffer greatly. More often in young seedlings, an oily, brown spot appears on the trunk. The causative agent is a fungus. Outwardly, again, it looks like Gommoz.
It is difficult to cure - clean and lubricate the damaged place with Copper Vitriol, or better with something cooler. For prevention, dig up the plant, inspect the roots.

Root rot - From the name it is clear what it is. There are several varieties in pot culture. As a rule, the gardener does not know anything until the massive leaf fall begins.
Dig up the plant for inspection and, if necessary, cut off the affected roots with a sharp knife. Treat them with a rooting stimulator. Change soil. Place the tree in a greenhouse, or at least wipe the leaves often with a damp cloth. Provide adequate lighting. And in any case, do not flood.

Tristeza - Withering away of the bark of the trunk. In varieties resistant to tristesis, the virus is in a latent state.
At resistant varieties... That's exactly what I don't like the most. You cut a cutting from an apparently healthy plant, graft it onto a seedling, and after a few years, the rootstock of the tree suddenly and for some unknown reason begins to hurt. For example, this often happens with Dioscuria lemon.
Therefore, it is recommended to propagate lemons by cuttings.

Xylopsorosis (Psorosis A) - The virus can be in a latent state for up to 10 years. When activated, the bark is damaged. Plantation professionals test for infestation by grafting sour limes. In indoor mini-gardening, amateurs do not know how to identify this disease and think that it is Gommosis. It is impossible to cure.

Malseco - Infectious desiccation shoots. The disease on plantations in Georgia appears sharply in spring, and in indoor plants from autumn to spring. Causes leaf fall. The disease begins at the ends of the branches. Affected wood, on the cut, acquires a reddish-orange color. You can immediately distinguish - the petioles from the leaves remain on the branches.
I remind novice gardeners that if several leaves have fallen off from the lower tier (or even almost along the edges of the branches) and cuttings remain on the branches, this may well be caused by poor lighting in winter. Therefore, do not panic prematurely.
How to treat the affected tree, I don’t know for sure. They say there is only one tool for amateurs - an ax.

Wonderful garden and orchard, without problems and without the hassle!

Pests and diseases of indoor lemon

Lemon like everything houseplants periodically can be affected by diseases and pests.

Common Lemon Diseases.
Of the diseases that affect homemade lemon, gum disease (gommosis) and soot fungus are of particular danger.

Gommoz. In case of disease with gommosis, cracks appear on the bark, most often at the bottom of the trunk, from which a sticky liquid protrudes - gum, the bark gradually dies off, from this the tree begins to wither and may die.
Most often homosis occurs in plants grown from cuttings. Factors contributing to the appearance of the disease: deep planting, prolonged waterlogging of the soil, watering cold water and excessive nitrogen fertilization.

Gomose on the trunk of a lemon

Control measures: First of all, it is necessary to eliminate the causes of homosis. The wounds that appear on the bark are carefully cleaned, disinfected with a 3% solution of copper sulfate and covered with a paste of copper sulfate and lime. You can also use garden pitch or clay for coating.

Sooty fungus on lemon leaves

Sooty fungus. On the leaves, and with the development of the disease on the branches and on the trunk appears dark patina. This is the sooty fungus, it settles on the secretions sucking insects such as mealybugs and scale insects. Soot fungus interferes normal growth and development of plants.

Control measures: the fungus from the leaves is removed with a wet cloth, and from the branches and trunk, they are cleaned with brushes. In addition to such removal, trunks and branches covered with sooty fungus should be whitewashed with lime, and the room where the diseased plant is located should be thoroughly ventilated.

Pests

Scale on the trunk of a lemon

Shchitovka
Shchitovka is one of the most common lemon pests and most often settles on weakened plants. These are small insects, they can only move in the larval state. Adult pests stick to the leaf veins from below, and persist for quite a long time. When living on a plant for a long time, scale insects reproduce well and also affect the upper side of the leaves and even young shoots. Plants, with severe pest damage, are depleted and dry out.

Mealybug
Scale insects, insects similar to scale insects, but larger and more mobile, cause harm in the same way as scale insects.

Aphid
It settles in a colony on flowers, ovaries, shoots and on the underside of foliage. It feeds on juice, because of which the foliage, twisting, dries. Insects, which are 1.2-2.1 mm long, are colored dark green.

Control measures:
Lemon leaves are washed from scale insects, worms and aphids with soapy water or tobacco infusion with a toothbrush. For 1 liter of water, you need to take 50-60 g of tobacco, and insist for two days. Washing should be repeated several times. Good results are obtained by a solution of green soap with anabazine sulfate. In a liter of water, you need to dissolve 4-5 g of green soap and add 1.5-2 g of anabazine sulfate. This solution is washed or sprayed on the affected plants. After a day, the solution should be washed off; for this, the plants are washed with clean water. warm water. This spraying is repeated 3 times every 7 days. You can also use the following solutions:

NIUIF-100 (thiophos) - 10 g per 10 liters of water; spraying with thiophos can be combined with treatment with Bordeaux liquid or superphosphate extract;

Chlorophos - from 30 to 100 g per 10 liters of water (after checking for a burn);

Scale on lemon leaves

Preparation BI-58 or Rogor - 10 g per 10 liters of water;

Anabasin sulfate - 30 g per 10 liters of water plus 40 g of green or laundry soap;

Karbofos - 30 g per 10 liters of water;

Ethersulfonate - 30 g per 10 liters of water;

Soap-kerosene emulsion 10 g of kerosene and 5 g of soap per 1 liter of water; the solution is thoroughly mixed;

gruel from onion(passed through a grater);

Infusion of garlic (3 medium cloves per 1 glass of water; leave for one day in a sealed container);

Lemon affected by spider mites

Red, or spider mite
The pest braids the underside of the leaf, where it settles. Insects small size(up to 0.4 millimeters), so they can not always be immediately detected with the naked eye. Leaf juice is food for insects, so the leaves turn yellow and dry out prematurely. Ticks often appear at low humidity and high temperatures.
Control measures:
Sulfur dusting is used against the red tick.
To destroy ticks, the same pesticides are used as in the fight against scale insects and worms. If there are no pesticides, you can spray the plants daily with a strong jet cold water especially the underside of the leaves.

Indoor lemon diseases: causes and treatment

Many vegetable growers mistakenly assume that at home, a houseplant will not be exposed to diseases and pests. However, a lemon growing at home is still a plant. Therefore, the risk of the appearance of a disease or a tick still exists. Do not panic ahead of time. In this article, we will tell you what lemon diseases exist and how to deal with them.

Causes of diseases in homemade lemon

Many reasons can cause disease in a houseplant. The main ones are:

poor quality soil;
inoculum;
containers that have already been used before;
weakened immunity resulting from improper watering, air temperature, fertilizer, lighting, pruning;
weakened immunity caused by a previous disease;
the ingress of spores, various viruses and bacteria during the summer airing period;
viruses and bacteria that got into the apartment "thanks" to insects;
mite.

There are many other reasons as well. However, they are less common.

Harmful insects for indoor lemon

The main pest of citrus fruits is aphids. It destroys the leaves of the plant, then spreads to the branches of the tree. At the same time, aphids choose the youngest and most tender leaves. What does a pest look like?

This insect is small in size, has a light green color. First, the pest attacks the inside of the leaves, which is why it is so difficult to notice at an early stage of infection. Then the insect captures the entire plant along the branch. The first sign of an aphid infestation is the curling of the leaves of a homemade lemon. An insect can get on citrus from another houseplant, such as fuchsia.

This culture is a favorite delicacy of aphids. You can harm a lemon by bringing wildflowers home. The pest can hide in the soil, and suffer from it different cultures. Therefore, taking untested soil after other plants or even another lemon, you run the risk of completely destroying the indoor tree.

However, do not immediately put an end to the plant. The success of the fight depends on how quickly you identify the disease. If the pest did not have time to spread far, then it will be enough to cut off the infected branches and crush the pests.

Many gardeners use folk methods. For example, an infusion of garlic helps from a pest. To cook it, use eight cloves of garlic. They must first be cleaned and reground. ready mix stir with water in a ten-liter bucket and leave for one day.

The infusion will be ready after you express it.
If aphids appeared due to poor-quality soil, then soil replacement will be needed. Before this, you need to prepare the plant. Place a lemon in a contact insecticide solution or garlic infusion. However, this time the concentration of the drug should be half that in the fight against aphids.

Another pest of homemade lemon is the scale insect.

In this state, it cannot resist bacterial and viral diseases. However, there is a rule for this insect. As with aphids, garlic water, insecticides, and a soap solution work well. Soap infusion is prepared as follows: two tablespoons liquid soap dilute in a liter of water. Then treat the infected leaves with this preparation. After sixty minutes, thoroughly wash the soap off the lemon. The procedure is recommended to be repeated after two or three days.

spider mite

The common spider mite can also kill the plant. He is also not averse to eating young citrus leaves. The main sign of the pest is the characteristic cobweb on the leaves of the plant. Very often, the spider mite appears on crops growing in dry air conditions.

The spider mite is afraid of moisture. Use a 1% solution to control ticks. boric acid. Most often, one spray is enough to kill the tick. However, if the tick does not give up, then repeat the procedure four or five times. An interesting fact is that pest control is equal to the procedure for preventing viral diseases.

Viral and bacterial diseases

sooty fungus

Some of these diseases are treated quickly and painlessly for the plant. However, there are diseases that are difficult or impossible to treat. Such a disease is a soot fungus, which greatly weakens the plant, leads to drying and weakening in growth. You can recognize the disease by the ashy bloom on the leaves. It is not difficult to cure a plant. You need to rinse it with warm water using a dish sponge. It is recommended to ventilate the room where the lemon was before putting it back.

Another disease is scab. It affects the leaves and branches of the plant. Scab is characterized by the appearance of spots on lemon leaves, which gradually darken and become soft. Diseased areas of the lemon rot and fall off. The disease is carried by wind or insects. The fight against the virus must begin with preventive measures. In the spring, treat the culture with a two percent solution of copper sulfate. If the disease does appear, immediately destroy the affected areas of the plant. Treat the rest with Bordeaux mortar.

Warty

Another fungal disease that can infect indoor lemon - warty. Judging by the name, you can determine the main symptom of the disease. The fact is that growths form on the leaves of the culture. However, they are not as harmless as they might seem. The fungus depletes the plant and destroys future harvest. The methods of struggle are the same as with scab.

root rot

Infection is much more difficult to deal with. The most common lemon diseases are gummosis and root rot. The first infection is characterized by rotting and cracking of the tree bark. In this case, you need to water the culture with warm water.

The main purpose of root rot is evident from the name. The infection affects the roots of the plant. If the lemon leaves wither, the branches dry up, and the leaves begin to fall off prematurely, then this is root rot. Infection control measures are as follows. Remove the tree from the container, and clean the roots from the ground. The affected soil is sterilized. Pour new soil into the container.

We cut off the rotted parts with a knife. We place the root system of the lemon for about sixty minutes in a solution of potassium permanganate. Next, the plant is removed from the solution and slightly dried. Process cut points wood ash. Then the treated plant is planted in a new place of growth. However, the work did not end there. You need to keep a close eye on the lemon and fertilize it constantly.

So, we have listed the main lemon diseases, and also told what their treatment is. Lemon pests are no longer afraid of you.

Fighting diseases of indoor homemade lemon

Homemade lemon, like any other citrus crop, is susceptible to many diseases. It can be infectious, viral, fungal diseases, as well as diseases resulting from improper care of the plant.

Indoor lemon diseases often occur due to a lack of trace elements. So, for example, if a citrus is deficient in nitrogen, small, light yellow spots appear on its leaves. With a lack of phosphorus, the leaf plate fades, and its edges dry out. If the tree lacks iron, a light green mesh appears on its leaves; if there is a lack of manganese or boron, the ovaries fall off. To prevent this, you should regularly make mineral and organic fertilizers. At the same time, it is important to observe the dosage, since an excess of fertilizers also negatively affects the condition of this plant.

Lemon diseases at home indoor conditions and their photos

Lemon diseases at home can be caused by pathogenic microorganisms: fungi, viruses, bacteria, mycoplasmas. Affected individuals develop various defects(shrinking, deformation of fruits and leaves, spotting, growths, and others). The causative agents of diseases are carried by the wind, with the help of insects, and also through drops of water during watering and spraying.

Most often, weakened trees are susceptible to diseases, so it is important to create everything when growing a lemon. the necessary conditions for its full development, to carry out proper care, to conduct regular, thorough examinations. The fight against lemon diseases should be carried out at the first signs. From a diseased individual, it is required to cut off all the affected parts so that they do not weaken the tree.

Most dangerous diseases homemade lemons:

For the prevention and elimination of pathogens of fungal and bacterial diseases, the Fitosporin biofungicide is recommended, which is watered and sprayed with citrus.

This disease occurs in the lower part of the trunk. Gradually rises up to the branches and down to the roots of the tree. In places of defeat, bulges are formed in which gum accumulates, which is a yellow or brown liquid that hardens in air. Affected areas crack and die. There are wounds on the tree. With a strong defeat of the lemon, the leaves dry up and fall off. Individuals infected with gommosis continue to produce crops, but their fruits become smaller and lose their taste qualities. If measures are not taken to eliminate this disease, the citrus will die.

Often, gommosis affects leaves and fruits. Brown spots appear on the leaves, which grow over time. On the affected fruits, the skin darkens and coarsens. The pulp softens, rots and acquires an unpleasant odor.

It is quite difficult to treat this disease. Sick areas are cleaned and treated with a solution of copper sulfate. After that, the tree is removed from the soil, its roots are cleaned and transplanted into fresh soil. Sick bark and wood are cut out, all cleanings are burned.

Scab and other diseases of lemon leaves

Lemon can also affect scab, which can be recognized by convex spots that appear on the leaves, branches, citrus fruits. After some time, instead of these spots, holes form, after which the leaves fall off, the fruits and bark of the branches crack. The causative agent of scab is a pathogenic fungus that can overwinter in fallen leaves, spread by wind and insects. Grows quickly in a humid environment.

To prevent this disease in the spring, the crown and soil should be sprayed with a solution of copper or iron sulphate. A diseased plant is sprayed after bud break with Bordeaux liquid. Secondary spraying is carried out after flowering. To do this, you can use copper chloride, cuprosan and other fungicides.

The affected parts of the lemon must be collected and burned. Change the soil. In the spring, before the buds swell, all diseased branches are removed. The tree is sprayed mineral fertilizers. For this, urea (10%) is used, ammonium nitrate(10%), nitroammophoska (10%), calcium chloride (70%). Effective in the fight against scab drug "Strobilin".

sooty fungus

It appears on the leaves, later on the branches and trunk in the form of a dark coating. This disease slows down the growth of the plant, prevents its normal development.

When signs of soot fungus appear, the plaque is washed off with clean warm water. It is useful to rinse the tree under the shower. The room where the affected lemon is located must be well ventilated.

Warty

Wart is one of the diseases of lemons that occurs in room conditions. Young shoots, fruits and leaves are affected by a pathogenic fungus.

Small yellowish spots appear on the leaves, which after a while turn into gray warts. On the shoots, the warts increase in size, forming large growths, which leads to the death of the shoot. Formed on fruits brown spots, the ovaries fall off. Wart develops rapidly in extreme heat and high humidity.

To eliminate this disease, the affected parts of the plant are cut and burned, then the crown is sprayed with Bordeaux liquid. The first spraying is carried out in March, the second immediately after flowering, the third - in July.

Root rot on lemon

Root rot on a lemon is not noticeable until intensive leaf fall begins. When this sign appears, the tree is dug up and inspected. root system. If there are lesions, they are removed with a sharp knife. After that, the citrus is transplanted into fresh soil and placed in a bright place. The next few days, watering is not performed. The leaves are wiped with a damp cloth.

Sometimes, when root rot appears, dark brown spots appear on the trunk, through which dirt seeps. Over time, the bark dries up and dies.

Photos of the above indoor lemon diseases can be seen below:

Viral diseases of lemon

Domestic lemon diseases such as citrus cancer, leaf mosaic, and tristesis are viral.

Citrus canker appears as dark brown spots on leaves and fruits. With a long illness, the leaves fall off, the fruits are formed with defects. This disease leads to the death of the plant. Treatment is not subject.

For the prevention of citrus cancer, they carry out spring processing wood fungicide liquid copper.

Leaf mosaic is recognized by light, sometimes dark green stripes or strokes on the leaves. It leads to deformation of the leaf plate, as well as to a slowdown in the growth of the tree. Treatment is not subject. At good care and regular top dressing becomes less pronounced.

Tristeza - leads to drying and falling of the leaves. With a strong defeat, branches, bark and entire trees die. Treatment is not subject.

Lemon disease - sticky leaves

Quite often, citrus owners are faced with deformation, drying and falling of its leaves.

Lemon leaf diseases occur for various reasons. It may be lack nutrients, bad care, pest damage, tree disease.

The cause of leaf fall is often a lack of light, dry air or too high an air temperature. It negatively affects the leaves and the plant as a whole by watering with cold and chlorinated water, an excess of moisture in the soil, and a violation of the acid-base balance of the soil. In addition, lemon leaves react sharply to any changes, whether it be moving it to a new place or changing the temperature regime.

In some cases, citrus leaves become sticky. sticky leaves The lemons look like they've been sprinkled with syrup. Such a disease, as a rule, causes a scale insect that has settled on a tree. If measures to combat this pest are not taken in a timely manner, soot fungus may develop in the sticky liquid. To eliminate sticky plaque, the leaves are wiped with a solution transformer oil(6 ml per 1 liter of water). After 5-7 days, re-treatment is carried out. The solution not only effectively removes sticky plaque, but also destroys the young scale insect, which has not yet been covered with a protective shell. If the treatment is not carried out, the plant will die.

You can use another way to treat a tree. In the warm season, citrus is sprayed with karbofos or tobacco solution. To completely eliminate the disease, 2-3 such treatments are required with an interval of 7-10 days.

The characteristic signs of lemon diseases are presented in the following photos:

Diseases of indoor lemon

indoor lemon- the creature is alive, so it may have problems. The troubles that happen with a lemon can be divided into three groups: improper care, pests, diseases.

Non-compliance with the rules for caring for the plant (watering, lighting, temperature, lack of nutrition, transplanting and violation of the pH balance of the soil). With insufficient watering, the tree dries out, with excessive watering, yellowness of the leaves appears and the root system rots.

The lack of one or another trace element can be determined visually. With a lack of iron, a leaf that has a rich green color first becomes “speckled” (green and yellow spots alternate), then fades, turns yellow and dries.

With a lack of phosphorus, the leaves become earthy-rusty in color, the tips of the leaves dry out. With a lack of potassium, the leaves wrinkle, forming "wrinkles" and folds.

With a lack of manganese and boron, the ovaries crumble. Correcting the situation is much more difficult than watering a lemon in time with special fertilizers for citrus fruits.

Lemon pests and how to deal with them

Shields and false shields(the larvae are hidden by a dark brown shield). In their presence, the leaves fall off, the branches dry up, the plant slowly dies. Pests must be cleaned (with a toothbrush or a sharp stick), rinse the lemon with soapy emulsion. You will learn about another way to deal with these pests from the video.

spider mite(red citrus mite). The larvae are located on the underside of the leaf, the leaf in this case is shrouded in cobwebs, which gradually envelop the entire plant. Leaves become discolored, dry and fall off, flowers and fruits are damaged. Spider mites are more likely to appear when the air in the room is dry. In case of damage by a spider mite, you can spray a lemon with a 0.15% Aktelik solution. Spraying will have to be repeated three times with an interval of 10 days.

Mealybug(larvae and females feed on the entire above-ground part). If they are present, sticky secretions of a mealybug appear on the surface of the leaves, later the leaves dry out, spots and cracks form on the fruits. The fruits, not ripe, fall off. The plant must be periodically inspected and mechanically destroyed the larvae and females of the mealybug.

citrus aphid(small insects of black or yellow-green color). Paralyze the tops of young shoots. If they are found, it is necessary to spray the lemon with a 0.15% Aktelik solution. Spraying will have to be repeated three times with an interval of 10 days. To prevent aphids from appearing, you can put a pot of fragrant geraniums next to the lemon.

thrips(looks like a black line on the leaves, so small). They crap more than suck the juices from a plant, they can fly, they spread viruses. To destroy them, you need to wash the tree from the shower (cover the soil with a film) and treat it with a soapy emulsion.

whitefly(white small moth). The larvae are greenish-white in color, located on the underside of the leaves. Getting rid of them is quite problematic. In this case, the lemon is sprayed with insecticides at least 5 times every 3 days.

Indoor lemon diseases and methods for their treatment

Indoor lemons can suffer from many diseases caused by fungi, viruses, bacteria and mycoplasmas. The result of their impact is a variety of spots, ulcers, rot, wilting, growths, growths, etc. Harmful microorganisms spread with the help of insects, water drops during spraying and irrigation, wind.

Symptoms of damage to indoor lemons by bacteria and fungi are similar, but with an infection caused by fungi, along with increasing spots, fungal spores are visible on them - a gray coating, brown pustules or black dots of sporulation.

Diseases most often appear on weakened plants, so it is important to properly care for lemons at home, pest control, cutting out the affected parts of the plant, with cutting sections (you can use activated charcoal). It is better to immediately remove all flowers, buds and fruits from a diseased lemon so that they do not weaken the plant.

To suppress many pathogens and for prevention, it is effective to use the Fitosporin biological product (the drug is non-toxic, odorless). They are sprayed and added to the water for irrigation according to the instructions. It is possible to carry out 2-3-fold spraying with a 1% solution of Bordeaux liquid.

Anthracnose- the most common disease of lemons, caused by a pathogenic fungus. With anthracnose, the buds fall, the leaves turn yellow and fall, reddish spots appear on the fruits, the branches die off. It is necessary to cut dead shoots and carry out the treatment described above.

Scab(citrus wart) is also a common disease of a fungal nature. In this case, small transparent yellowish spots appear on young leaves, turning into pink-gray warts. Warts grow over time, forming a growth, in the future the shoot dies. Orange spots appear on the fruits, increasing in size, they become red-brown in color, the ovaries fall off. The affected parts of the plant must be cut and burned, the crown of the lemon should be sprayed with a 1% solution of Bordeaux mixture.

Gomoz(gum disease) is manifested by longitudinal brown-red spots on the branches and trunk of a lemon. The bark in these places gradually dies off, a sticky golden liquid flows out of the cracks, which solidifies in the air.

For the treatment of homosis, it is necessary to find out the cause of the disease and eliminate it. The lesions on the trunk must be cleaned with a sharp knife, cutting out the affected areas, disinfected with a 3% solution of copper sulfate and cover the wounds with garden pitch. Treatment of the wound is recommended to be carried out several times, until complete recovery. Affected thin branches are best cut and burned.

sooty fungus can settle on a lemon when infected with scale insects, mealybugs. In order for it not to appear, it is necessary to deal with pests in a timely manner.

Inspect the lemon more often, so you will notice pests and diseases at an early stage. Timely measures taken will not cause much harm to the lemon.

The video below shows another way to deal with scale insects

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Lemon diseases

Lemon trees, like other indoor plants, can be affected by viral and infectious diseases and pests.

Although this does not happen often, it is better to find out what lemon diseases exist, how they affect external state plants and how to treat them. Find out what viruses and infectious diseases affect indoor lemon, what pests it can be attacked, and what to do in such cases.

Why is lemon sick

Lemon is easily exposed to diseases and attacks by pests and viruses in the following cases:

If he did not have time to get stronger after recovering from other diseases.
If he is provided with poor care: contaminated soil, poor lighting, illiterate pruning, insufficient soil fertilization, improper watering etc.
If a virus or pathogenic bacteria brought insects or a diseased stalk when grafted.

Viruses and bacteria can get on the plant when the room is ventilated, but this happens quite rarely.

Most often, viruses, bacteria and pests infect indoor lemon leaves. However, if a lemon sheds fruits and leaves, the reason for this may be a lack of trace elements:

If there is a pronounced network of green veins on light leaves, the lemon needs manganese, zinc or iron. Another reason is soil pH disturbances.
If an adult leaf loses its gloss, dries at the ends and turns a reddish-brown color, the plant is deficient in phosphorus.

Why does a lemon shed its leaves

If pale yellow speckles appear on the leaf, and it turns yellow and fades over time, this indicates a lack of nitrogen.
If notches appear between the veins of the leaves, the lemon needs potassium top dressing.
If the plant drops the ovaries, it urgently needs manganese.

Not useful to the plant and too frequent feeding. If leaves fall on a lemon, what to do in this case? Postpone feeding and evaluate the correctness of care: suddenly you are doing something wrong.

Viral diseases of indoor lemon

We learn about three viral diseases in which a lemon sheds leaves: why they often lead to the death of a plant, and whether they can be cured:

Leaf mosaic

Having become ill with it, the leaves become covered with dark or light strokes in the form of a mosaic, lose their shape. The growth of the tree is noticeably slowed down.

This disease is not treated by any means, but symptoms can be reduced by regularly fertilizing the soil and providing the plant with proper care. If you have other lemons, it is better to destroy the plant affected by the virus as soon as possible.

Cancer of citrus

When affected by this virus, brown spots appear on the foliage and fruits. When the form is started, the leaf falls off, the lemons take on an ugly shape, and a little later the tree dies.

It is impossible to cure citrus cancer: to prevent it in the spring, we treat the plant with liquid copper fungicide.

Tristeza

Having picked up the tristeza, the lemon loses its foliage, the bark or twigs die on it. The plant dies - it cannot be cured.

Most often, viruses infect weakened lemons that are poorly cared for.

Lemon diseases: description and treatment

Fungal and infectious diseases of indoor lemon

Consider the main diseases of lemons that are fungal and infectious in nature, their symptoms and methods of treatment.

Most often, indoor lemons are affected by the following fungi and infections:

Gomoz

With homosis, the branches and trunk of the plant are covered with elongated spots of a red-brown hue, under which the bark quickly dies and cracks. Cracks ooze a sticky golden substance that quickly hardens.

Causes of homosis: excessive humidity in the room, cuts or breaks in the bark, deficiency of phosphorus and potassium, excess nitrogen fertilizers, diseased soil or severe deepening of the trunk.

How to treat homosis? We cut off all the stains from the bark of the trunk, treat the sections with a three percent solution and use putty from garden pitch. We repeat the treatment until spots on the bark of the trunk cease to form. If the branches are covered with spots, cut them off entirely and destroy them.

Anthracnose

This is a fungal disease in which leaves fall from a lemon, and many do not know what to do about it. First, the leaf turns yellow, then flies around, as well as the buds. The branches of the plant gradually die off, and red spots appear on the lemons.

To get rid of the fungus, we destroy the dead branches and spray the lemon with Fitosporin or a one percent solution of Bordeaux liquid. We spray three times.

Scab

Another fungal disease room lemons- scab, in which young leaves are covered with transparent yellowish spots, gradually turning into pink-gray growths. Spreading over the leaf, these growths destroy it along with the shoots. Fruits with scab are covered with orange spots, eventually becoming red-brown. In this case, the lemon discards the fruits.

In order not to destroy the entire plant, we cut and destroy all the affected parts of the plant, and spray the crown with one percent Bordeaux liquid.

Melseco

With melseco, the shoots of the lemon dry up, the foliage falls off, starting from the tips of the branches, and the cut of the branch turns red.

Poor lighting is to blame for this lemon disease: in winter, the plant did not have enough light, and it was not illuminated.

Melseko treatment does not exist: we observe the plant, and if it continues to hurt, we destroy it.

root rot

If a lemon abruptly sheds a leaf, dig it up and inspect the roots. Having found rotten roots, we cut them off and transplant the lemon into a new disinfected soil.

We put the transplanted plant on a bright windowsill, and avoid watering for a week - we just wipe the leaves with damp gauze or a sponge.

Indoor lemon pests

In addition to infectious and viral diseases, indoor lemons are affected harmful insects. We will find out which pests attack a home-grown lemon and how to deal with them.

Shchitovka

Scale insect larvae settle on the underside of the leaves and subsequently move to outside. The plant withers, dries, quickly picks up viruses and infections.

To get rid of scale insects, we use a special insecticide or soapy solution, for which we dilute 2 tbsp in water (1 l). any liquid soap. we wet soapy water all places affected by insects. We wait one hour, wash the plant in the shower and after a couple of days repeat the treatment.

Indoor lemon pests

Aphid ordinary

Colonies of light green aphids usually settle on young shoots that are not overgrown with bark. First, they attack the bottom of the leaf, then move up, sucking out the juices along the way. The leaves curl up and die.

If there are few aphids, we cut off the affected shoots and destroy them together with insects, after which we feed the plant complex fertilizer. If the aphids have covered most of the indoor lemon, spray the tree with an insecticide or garlic infusion, for which we clean 4 heads of garlic and soak them in 5 liters for 24 hours. After we filter.

spider mite

Young twigs and leaves are often affected by this insect. The foliage curls up and a web appears around it. The appearance of spider mites is to blame for the lack of humidity.

To get rid of insects, we spray the tree with a one percent solution of boric acid, carrying out the procedure four times.

root aphid

Unlike the common aphid, the root aphid found in contaminated soil infects the roots.

To exterminate it, we transplant the lemon into disinfected soil, treating the roots with a contact insecticide or a weak garlic tincture.

In many sources, you can find advice on treating lemon with an alcohol solution - this is strictly prohibited. Lemon does not tolerate alcohol.

As you can see, lemon diseases are numerous and sometimes very serious: some lead to the death of the plant. To protect it from adversity, plant the plant only in disinfected soil, give it a regular shower and wipe the foliage and branches with wet gauze, treat the crown once a month with soapy water, and inspect the tree more often for disease or insect infestation.

Lemon: diseases and their treatment

Indoor lemon diseases can be of fungal, viral and bacterial origin. They spread through insects, water drops during irrigation and spraying. Important to remember: healthy plant less prone to disease than the weakened. That is why at home it is simply necessary to provide the flower with proper care and microclimate. The main thing in the treatment of a flower is the correct and timely diagnosis, adequate actions to eliminate the disease. So, indoor lemon diseases, their description with a photo, effective treatment from experts.

Typical indoor lemon diseases and their treatment

Why do lemon leaves turn yellow and curl? Why does a plant drop leaves? Why do lemon leaves turn black? The reason may be improper care, lack of trace elements or flower diseases. If the leaves fall, then the homemade lemon may lack lighting, it was poured. Lemon leaves fall if the air is dry in the room where it is located, or the horse system is broken.

Most often, lemon leaves fall in autumn-winter period, but leaf fall can be observed at any other time of the year. main reason: unfavourable conditions . For example, a recently purchased plant may shed its leaves. The explanation is simple: in the greenhouses where it is grown, the conditions of detention differ from the microclimate in the apartment. Leaf fall is a reaction to a change in the microclimate of growth. After buying a lemon, it must acclimatize in new conditions, it is undesirable to transplant it, it is provided with proper care. At this time, it is important not to pour the flower, because without leaves, the process of evaporation of moisture is disrupted. Experts recommend spraying more than watering; epin can be added to the solution.

Why does a lemon shed its leaves if its place of growth has not changed? Reason: lack of light. This plant belongs to the category of photophilous, that is, it needs a 12-hour light day. In the autumn-winter period, when the length daylight hours decreases, the plant needs to be highlighted fluorescent lamp. The pot is best placed with a western or east side at home, it is possible from the south, but with obligatory shading.

The lemon shed its leaves if a transplant was performed with a complete or partial replacement soil. In this case, the root system is disturbed, which is necessarily reflected in the crown. She crumbles. What to do? It is necessary to help the flower restore the root system. To do this, watering is reduced, the flower is placed under a greenhouse ( polyethylene film), which should not touch the leaves and branches of the flower. Spraying is carried out to maintain high level humidity in the greenhouse. Every day, the greenhouse is ventilated for 15 minutes to prevent condensation. Epin is added to the spray solution once a week, and root can be added to the irrigation solution. The greenhouse does not need to be abruptly removed. To adapt the flower every day increase the airing time. The greenhouse is completely removed when new leaves appear on the lemon.

Lemon sheds leaves when cancer strikes, viral mosaic. All of these diseases are viral in nature. In most cases in indoor cultivation diseases cannot be treated, and the plant is completely discarded in order to prevent infection of other flowers.

Lemon leaf cancer looks like brown spots irregular shape, which inside dry out and crumble . With prolonged illness, young lemon leaves develop deformed and small. The disease is not subject to treatment, it can be prevented by spraying the flower with fungicides in the spring.

Leaves fall if homemade lemon hits leaf mosaic. On the leaves it looks like light spots irregular shape, sometimes spreading over the plate in the form of strokes. The mosaic is not treatable, the plant is removed in most cases.

Lemon leaves curl if the watering regime is violated. This is overdrying or waterlogging of the soil. In the first case, it is necessary to water the flower with small portions of water, but do not allow the soil in the pot to become waterlogged. In both cases, the plant is placed under a greenhouse, where it is regularly sprayed. Waterlogging the soil in a pot leads to rotten roots. Damaged roots can no longer “drink” water, and therefore the plant suffers from a moisture deficit even in waterlogged soil. In this case, watering is stopped. The lemon is taken out of the pot, while the integrity earthy coma You can’t break it, and wrap it in paper. The latter will draw excess moisture out of the soil. Drying in this way is carried out for 3 days, the plant needs to be shaded. Then the flower is returned to the pot and a greenhouse is organized for it. Watering is not carried out, much attention is paid to spraying.

Lemon leaves dry around the edges if the room temperature is high and low humidity air. The optimum temperature for lemon is +20. +23 degrees, humidity - not lower than 70%. Otherwise, the plant is sick. Very often, the leaves of a room lemon turn yellow if it is placed close to heating appliances in winter. The plant does not like dry air, and even in winter it may suffer from a lack of light. It is illuminated with a fluorescent lamp.

Leaves turn yellow and fall off if a lemon infects a spider mite. In this case, on reverse side sheet plate will be present white coating, and on the branches - a light, whitish cobweb. The leaves are covered with small spots. How to treat? It is necessary to wash the plant under a shower with warm water, then treat with one of the preparations Fitoverm, Vertimer (three times with an interval of 10 days) or Akarin, Neoron (4 times with an interval of 7-10 days). It is better when the affected flower is isolated from the rest of the collection.

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