Lemon leaf diseases at home. Causes and treatment of homemade lemon diseases

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. In the affected individuals, various defects appear (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, proper care conduct regular, thorough inspections. 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:

Photo gallery

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

Gommoz

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 blue vitriol. 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%), ammonium nitrate (10%), nitroammophoska (10%), calcium chloride (70%) are used. 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 a 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. Brown spots form on the fruits, the ovaries fall off. Warty develops rapidly in extreme heat and with high humidity air.

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:

Photo gallery

Viral diseases of lemon

Such diseases homemade lemon like citrus canker, 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. Leads to deformation sheet plate, as well as slowing down 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 by different reasons. It may be lack nutrients, poor 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. The sticky lemon leaves look like they've been sprinkled with syrup. Such a disease, as a rule, causes, 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 of 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:

The most common and very dangerous for citrus is a pathogenic fungus that causes anthracnose disease - 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 promoted by high temperature in the room and high humidity.
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:
- too much deep landing(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 hydrated 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 ring appears on the trunk, brown spot. 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.

Malseko - Infectious drying of shoots. The disease on plantations in Georgia appears sharply in the 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.

Indoor lemon, like all citrus fruits, often suffers from diseases of a viral, infectious, and even fungal nature. Lemon diseases are most often the result of improper care: lack useful substances and moisture, care errors. The plant is slowly dying.

Shchitovka - a common lemon pest

If a lemon at home has signs of some kind of disease, then you should act. Advice from experienced crop growers can help with this.

Why does indoor lemon get sick?

Homemade lemon diseases occur for several reasons. The most common of them is the weakening of the plant's immunity. This is partly the fault of the man himself. Reasons for weakening the immune system:

errors in care;
improper watering and fertilization;
unfavorable microclimatic conditions (air temperature, humidity, etc.);
pruning errors.

All these errors lead to the fact that the plant becomes weak. The influence of the old disease is not excluded.

Another reason is viruses and bacteria. They can get into a pot with a plant different ways. Some bacteria spread through the air. Others do not get into the pot themselves, through their main carriers - insects. At indoor lemon due to lack of oxygen. Like all living things, he needs fresh air. And if a pot of citrus is in an unventilated room, the risk of signs of disease increases several times.

The most common are the reasons that a person commits at the very first attempts to care for a lemon. Poor-quality grafting material, as well as soil, can affect not only the growth and fertility of a lemon, but also cause its death.

Improper care can lead to scab and other infections

What pests can threaten a lemon?

scab;
spider mite.

They infect the lemon root system, branches and leaves, but each of these insects has its own characteristics.

Aphid

The fight against aphids is not unsuccessful. The main thing is to notice pests in a timely manner. All that is needed is to cut off the affected leaves and branches.

Aphids first show up with characteristic curled leaves.

Getting rid of the shield is easy. Methods of dealing with it are similar to those used against aphids: insecticides and special solutions prepared at home are suitable. One of these is a soap solution:

Prepare one liter of clean water.
Pour 2 tablespoons of liquid soap into a bottle of water.
The substance is thoroughly shaken.

The prepared solution should be applied to infected leaves. It will be difficult to resist the disease with such a remedy at one time. Greatest effect achieved in 3-4 daily procedures for 60 minutes. After the end of each, thoroughly rinse the leaves under running water.

The spider mite is an equally common pest. It also attacks leaves. The affected area is always covered with a thin web, which is characteristic of the life of this insect. It is easy to deal with it: you should prepare a 1% solution boric acid. They should spray the affected citrus. Already after the first procedure, improvements will be noticeable. For maximum effectiveness, the course of treatment should be 3-4 days.

Spider mite often infects lemons

Bacteria and viruses

sooty fungus;
scab;
warty;
root rot.

The latter attacks the root system, hitting the nutrient center of all citrus fruits. A diseased plant dies very quickly. Therefore, at the first signs of rot noticed (drying of the leaves and stem), the lemon should be transplanted to a new place. But this procedure has its own characteristics.

You can save citrus from rot only by replacing the soil with a new one. The affected roots must be shaken off the ground, the dead areas removed and the plant placed for 1 hour in a solution of potassium permanganate. This procedure destroys pathogens. After 60 minutes of being in the treatment solution, the plant is dried and planted in a new place. To return the lemon to its healthy appearance, you should fertilize it regularly.

Some diseases are susceptible fast treatment. Fungus is one of them. Due to the attack of harmful microorganisms, the plant slows down its growth and dries slowly. It is difficult to confuse such a disease with another, because it is characterized by an ashy coating that forms on the leaves. Do not be afraid of such symptoms.

It is not difficult to cure a plant. It is necessary to thoroughly rinse the affected areas under running water or wipe them with a sponge. And as preventive measures you should regularly ventilate the room in which there is a pot of citrus.

Often scab attacks home vegetation. This disease is characterized by the formation of spots on the leaves and stem. They quickly darken and make the leaf brittle. Affected areas can become soft, and their spread leads to the fact that part of the plant simply falls off. It is difficult to cope quickly with such a disease. Remove the affected leaves and treat the healthy part of the plant with copper sulfate. And so that the disease does not bother citrus later, it is important to carry out seasonal spraying. The same methods of treatment correspond to warty, the main development of which is associated with the destruction of the crop.

How to treat diseases of domestic lemons

Indoor lemon - evergreen citrus which is grown in decorative purposes and for obtaining exotic fruits. With improper care or infection, lemon diseases occur, which can be dealt with with timely and proper processing.

Causes of Lemon Diseases

Citrus fruits do not get sick as often as ficuses or flowering ornamental plants. There are several reasons why a lemon loses its decorative effect, shrinks and fades. These are improper care, lack of micro and macro elements, waterlogging, lack of light, drafts and other environmental factors.

Source: Depositphotos

Diseases of lemons: sooty fungus on leaves

Another group of causes is infection with pathogens and viruses. These are bacteria, fungi, insects as carriers of diseases. With improper care and lack of nutrients, the following problems arise:

light yellow spots on the leaves - lack of nitrogen;
drying of the edges of the leaf blade - lack of phosphorus;
falling off of the ovary - lack of boron and manganese;
the appearance of a light mesh on the shoots is a lack of iron.

Such problems are solved by introducing the necessary trace elements with irrigation. More serious diseases caused by microbes and viruses require the use of fungicides.

Infectious diseases

The causes and treatment of homemade lemon diseases depend on the nature of the pathogen. If cracks appear on the trunk of a tree, gum oozes out of them, leaves fall and the tree dries up - this is gummosis. Lemon fruits become soft and unpleasant in taste and smell. The disease is treated with a solution of copper sulfate, which is used to treat the affected trunk. Lemon is transplanted into another soil.

Sooty fungus is the second most common disease of citrus grown under conditions closed ground. Signs of soot fungus:

dark spots in the form of plaque on the leaves, stems and trunk;
citrus growth slows down, young greens fall off.

The disease is treated by washing the shoots and trunk with warm soapy water. Carry out regular treatments under a cool shower. The room is regularly ventilated.

Scab - infection, which first affects the trunk, and then the whole plant. Signs of scab:

dark convex tubercles on the leaves;
cracks in the trunk;
dark spots and holes on fruits.

To combat the disease, the plant is removed from the pot and treated from roots to top with a solution of copper sulfate. Transplanted to other soil. Affected fruits and leaves are burned.

To increase the immunity of the plant and protect against diseases, citrus is treated with a solution of liquid copper in the spring and suspicious leaves and fruits are removed. The plant is fed regularly complex fertilizers kept in a lighted room with regular ventilation.

The lemon tree is equally often grown both indoors and outdoors. winter gardens. It is relatively easy to grow, but the most common pests and diseases often affect citrus fruits. Do not panic if suddenly the lemon leaves turn yellow in spots, there are only a few reasons and you can recognize each after reading the information below.

Why are there yellow spots on lemon leaves?

Actually there are two possible options developments: either you have " uninvited guests”, or the plant has picked up a bacterial or fungal disease. Let's go over each of them next:

We have already learned to recognize the nature of yellow spots and the most probable cause their appearance on lemon leaves, then move on to the question of what to do about it. In the fight against scale insects, soap or detergent for dishes, as well as fungicides. First, we literally wash each leaf from the crusts, then we process everything with the preparation.

With mites, this number will not work, since they are not sensitive to fungicides even with broad action. Here it is better to use spraying mineral oil or grey. But the fungicide will cope with the fungus, you just need to find a copper-based drug.

When the cause of the stains lies in the soil, it should be replaced. Be sure to prune all the affected parts of the horse system, then transplant into a new clean soil and fertilize heavily in order to restore the lack of nutrition.