Tomato leaves curl. What to do if the leaves of tomatoes curl? Why do tomato leaves curl?

Why do the leaves of tomatoes dry in a greenhouse? Many gardeners often have a similar question. This problem can be caused by various reasons. If during the daytime you began to notice that the tomato leaves began to dry out and curl, this can be explained by the heat in the room. Leaves also require sufficient oxygen and various nutrients. It is worth considering the main reasons why tomato leaves dry out.

To begin with, it is worth talking about the temperature regime in the greenhouse. Even the well-known fact is that growing tomatoes should provide sufficient heat in the room; its excess (more than 35ºС) is destructive, which is why tomato leaves dry out. Plants in a greenhouse can be affected by pests, developing harmful internal microflora. To avoid negative consequences, the greenhouse must be ventilated in a timely manner, and when the room is too hot, the film is completely removed. It is better to cover the bushes in a greenhouse with a white cloth or other reflective material; such a “cover” will prevent the penetration of sunlight.

Heat is not as deadly to plants as lack of light. This problem is especially relevant in polycarbonate greenhouses, where condensation begins to accumulate in the wall, which does not transmit the sun well. To avoid withering and drying out of tomato leaves, you should ventilate the room more often. In northern latitudes in the summer, the days are quite short, so special panels should be installed that will help capture and reflect light.

Nutrients

Another reason why the leaves and flowers of tomatoes dry out and begin to wither is too much or too little ingestion of nutrients. When there is too much nitrogen, the greens begin to grow too much, which will lead to the flowers falling off. To get rid of this disease, plants are watered and sprayed with ash or potash fertilizers. In addition, an insufficient amount of nitrogen in the soil is quite dangerous, which can lead to the death of the plant.

It is often possible to encounter a potassium deficiency, especially if seedlings from a pot have just been transplanted into a greenhouse. Tomato leaves and flowers dry out, turn yellow at the edges, and fall off. To avoid this problem, timely feeding is required. Leaves dry out and turn yellow even with a lack of magnesium. First they begin to change color, and then dry out. Thus, you can see that insufficient and too much of any mineral becomes detrimental to the tomato.

Why do the leaves of tomato seedlings dry out (video)

Possible diseases

Often gardeners, seeing a half-dead garden bed, wonder why everything has dried up. The answer may be the appearance of a disease in tomatoes.

For example, a plant is often attacked tobacco mosaic virus, which negatively affects first the leaves and then the fruits.
Another problem is considered late blight, which causes the leaves to turn yellow and dry out. Fusarium wilt will primarily cover the leaves with a light coating and then cause them to curl.
Curly virus is the most unpleasant disease that cannot be cured. All that can be done is to remove and burn the old bushes, disinfecting the tools afterwards. The virus is transmitted through insects and direct contact.

To get rid of diseases, it is necessary to observe the correct temperature, watering, pinching and fertilizing procedures. If the plants do become sick, then the use of proven medicines is required.

It should be noted that plants get sick due to weakened immunity. Healthy tomatoes are usually able to successfully fight viral and bacterial microorganisms.

Insect infestation

To determine the specific type of pest, it is worth carefully examining the leaves, especially from the back side.

Aphid represented by small black individuals that prefer to live in the folds of the plant. They not only suck out the juice from the bush, but also inject a substance that causes deformation changes. The fight is carried out using an insecticide, and all tomatoes in the greenhouse are treated.

Spider mites can also lead to drying out. Quite often, improper mulching leads to damage to tomatoes by this pest. Insects prefer to live on the lower leaves, infecting a healthy plant within a few weeks. Spider mites are quite resistant to a large number of medicinal substances, so it is worth purchasing a specialized insecticide to treat the entire greenhouse.

As you can see, tomato leaves dry out for various reasons. Before you start treating plants, it is worth analyzing the reasons for this condition: how to water, fertilize and general care for tomatoes. Only after this can all necessary measures be taken to save the crop.

Why tomato leaves curl (video)

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Tomato leaf blades curl not so rarely; a similar phenomenon can be observed every year both in protected and in open ground. More often, leaves curl only on individual bushes or even branches of tomato bushes, and sometimes a similar phenomenon is observed almost throughout the entire plantation. Why do tomato leaves curl, how to solve this problem and how to prevent this phenomenon from happening again next year? We will talk about all this in this article.

Curling tomato leaves. © ichard Smith

1. Damage to tomato roots

Tomato leaf blades may begin to curl immediately after seedlings are planted in the ground or in a greenhouse. This usually occurs due to damage to the roots during the process of transplanting seedlings. In this case, it is difficult to help the seedlings with anything; if there is sufficient nutrition and moisture in the soil, you need to leave the plants alone, and after 4-5 days the leaf blades should return to normal.

2. Improper watering of tomatoes

This is perhaps the most common reason why leaves curl. Everyone probably knows that tomatoes love plenty of moisture, but these plants need to be watered not from time to time, taking long breaks, but regularly. It is precisely the violation of water doses, irrigation timing, and frequency of soil moisture that can lead to troubles in the form of curling leaf blades.

For example, tomatoes especially need moisture immediately after planting seedlings in open ground or a greenhouse, that is, in a permanent place. During this period, you need to pour 4-5 liters of water under them. Further, repeated watering can be done 9-11 days after the first; 6-8 liters of water can be poured under each bush.

In the future, tomatoes should be watered regularly in the greenhouse - once or twice a week, depending on whether it is hot or cool in it, and in open ground - depending on the presence or absence of natural moisture (rain). If there is no rain, then watering should be done every week, pouring 5-7 liters of water under the bush, but if it rains periodically, then watering may not be necessary.

During the formation of ovaries and the beginning of fruiting, the tomato watering should be increased by a third, but again, you should look at the weather.

When there is a lack of moisture, the tomato leaf blades begin to curl inward, so the plants protect themselves by minimizing the amount of evaporated moisture. If you notice this, then you need to quickly start watering the soil, but you should not pour out a lot of water at once; it is better to pour out 1.5-2 liters of water at room temperature every day for a week, until the condition of the leaf blades normalizes.

If, on the contrary, there is a lot of moisture in the soil, then the tomato leaves will curl with their edges up, thus increasing the evaporation of moisture by the plant. Here you need to immediately stop watering and do not moisten the soil for 10-15 days.

Do not forget that it is better to water tomatoes in the morning or evening to avoid curling of the leaf blades. Avoid watering your plants during the heat of the day, especially if it is very hot and the sun is shining brightly. For irrigation, use settled water at room temperature.

3. High temperature

Violation of the temperature regime when growing tomatoes in a greenhouse or extreme heat when growing in open ground can also cause leaf blades to curl in these plants. So, in a greenhouse for tomatoes you need to create conditions with temperatures from +21 to +23 degrees during the day and from +17 to +19 degrees at night.

When the temperature rises above +30 degrees, plants begin to experience temperature stress. In this case, in addition to curling of tomato leaf blades, shedding of flowers and ovaries may also occur. In a greenhouse, you can lower the temperature by opening doors and vents, but you need to ventilate the room in parts, without creating drafts. If the greenhouse is designed in such a way that it does not have windows, then in order to lower the temperature, it can be whitewashed inside or covered with a white cloth.

In open ground, you can try to shade the plants, increase watering of tomatoes in the evening and morning, and additionally add nitroammophoska in an amount of 15-20 g per square meter dissolved in water. In addition, the row spacing should be mulched with hay, straw or covered with a white or light-colored non-woven covering material.

If the leaf blades of tomatoes are severely curled from the heat, you can try to eliminate this problem by applying foliar fertilizing, that is, spraying the plants located both in the greenhouse and on the site with an aqueous solution of urea (one and a half tablespoons per bucket of water, the norm is 8-10 plants). After three days, you can carry out another foliar feeding, but this time with potassium sulfate, dissolving 8-10 g of fertilizer in a bucket of water, the norm is for 10-12 plants.

4. Excess or lack of fertilizers

You can’t get a good tomato harvest without fertilizers, many people know this, but some, for fear of harming the plants, apply too little of them, while others, wanting to get the maximum yield, apply too much of them. Both of these lead to curling of tomato leaf blades.

So, when there is an excess of zinc in the soil, the edges of the tomato leaf blade begin to bend. This can be confused with similar symptoms with a lack or excess of moisture, however, with an excess of zinc in the soil, the lower part of the tomato plants becomes purple in color, which is not typical for these plants.

When there is an excess of manganese in the soil, tomato leaves first curl, and then wrinkle and become bright green.

When there is an excess of nitrogen in the soil, the leaf blades of plants begin to curl, usually at the top of the plant. To neutralize the effects of nitrogen, you need to add potassium sulfate (8-10 g per square meter) or wood ash (50-80 g for each plant) to the soil in advance loosened and watered.

When there is a lack of elements, for example, calcium, tomato foliage begins to curl upward; this state of the leaf blades is often accompanied by the appearance of blossom end rot on the fruit. If excess zinc and manganese is quite difficult to eliminate, then calcium deficiency can be easily dealt with by adding calcium nitrate to the soil. To do this, you need to dissolve approximately 18-22 g of calcium nitrate in a bucket of water, adding 350-400 g of wood ash and 8-12 g of urea to the solution. This solution is enough for 3-4 square meters of soil under tomatoes.

With a lack of phosphorus, tomato leaves also curl, but at the same time become grayish. In order to quickly restore the flow of phosphorus into the plants, you need to add an aqueous solution to the soil, diluting 80-90 g of superphosphate in a bucket of water, this is the norm for 3-4 square meters of beds occupied by tomatoes.

With a copper deficiency, tomato leaf blades, in addition to curling, also acquire an atypical yellow color, sometimes becoming covered with yellowish spots, which may subsequently begin to turn black. Treatment with copper-containing preparations – “HOM”, “Oxyx” and the like will help restore the balance of copper.

Blue or curling tomato leaves may indicate a lack of phosphorus. © Michelle

5. No pinching

Stepping is the removal of lateral shoots; if this is not done, the tomato plant will begin to actively branch. This leads to too much thickening of the plantings; the plants will form a lot of leaf mass, which is usually curled.

It is often difficult to correct this situation, especially if the plants are very neglected, so tomatoes need to be planted at a young age, when they tolerate this operation as painlessly as possible.

And remember, it is better to break out the stepsons, and not cut them out, and do this in the morning, when the plants are turgor. The length of the stepsons should be no more than five centimeters.

6. Tomato diseases

Quite often, tomato leaf blades curl due to various diseases. Various types of diseases develop most actively in dense plantings, in areas where crop rotation is not observed, where plants are over-watered and the soil is not loosened.

Stolbur

With this disease, tomato leaf blades usually curl and deform, especially in the upper part of the plant, and they change color to pinkish or purple. In the lower part of the plant, the leaves usually turn yellow. It is best to fight stolbur with the help of the drug “Fitoplasmin”, this is the most effective drug. To spray plants, you need to prepare the solution in strict accordance with the instructions on the package.

Bacterial canker of tomatoes

When tomato plants are infected with bacterial canker, the leaf blades first begin to curl upward and then wither. You can tell that this is a bacterial cancer by the reddish-brown spots located on young growths. Typically, the leaves at the bottom of tomato plants curl and wilt first, then the disease spreads higher up and eventually affects the entire plant.

As a preventive measure, taking into account the most rapid development of bacterial cancer in conditions of excess soil and air moisture and the presence of various injuries on plants, it is necessary to water the tomatoes with moderate portions of water, avoiding waterlogging of the soil and when working with plants (weeding, loosening the soil) to avoid damage at the bottom of the trunk of tomato plants.

It is difficult to fight bacterial canker of tomato, but in the initial stages of the disease, you can treat the plants with copper sulfate, copper oxychloride, or Bordeaux mixture. When carrying out treatments, try to wet the leaves from the bottom and top sides and also spray the surface of the soil. It’s great if you loosen the soil a little before cultivating it.

7. Tomato pests

In addition to diseases, tomato plant leaf blades and pests often cause curling. Most often, this is caused by sucking pests that suck out the juice from the leaf tissues. Typically, tomato leaf curling is caused by pests such as whiteflies, aphids and spider mites.

Whitefly

This is a white butterfly that settles mainly on the lower leaves of tomato plants. As a result, they are the ones who begin to curl and then fade. The majority of whiteflies are in the greenhouse; if the lower leaves of tomatoes suddenly begin to curl, then watch the plants, shake them, perhaps you will scare away the butterfly, and it will appear.

If you see at least one whitefly, then be sure that this is the problem. You can fight whiteflies using any approved insecticides such as Fufanon or Mospilan. If you do not want to use harmful chemicals, you can treat whitefly-affected tomato plants with an infusion of yarrow (150 g per 5 liters of water) with half a piece of laundry soap added to the solution. Try to carry out processing in the morning and evening hours, be sure to pay attention first of all to the lowest leaves of the tomato.

As a preventive measure, you can treat tomatoes with an infusion of garlic (2-3 heads per 5 liters of water) or dandelions (500 g per 3 liters of water).

It is important to remember that insecticides can be used no later than 20 days before harvest. It is advisable to carry out any treatments in cloudy weather, but only when there is no rain.

Aphid

Aphids occasionally, but still infect tomato plants; they appear especially often on open ground plants, but they can also appear in a greenhouse. Most often, aphids cause tomato leaf blades located at the top of the plant to curl. It is easy to understand that it is aphids: you need to turn over a tomato leaf and you will see insects there. Ants often scurry between them; they carry aphids and feed on their sweet secretions. Given this, the fight against aphids should begin with the destruction of ants, because this is a more difficult task. You can remove aphids using insecticides that are necessarily permitted and strictly following the instructions, for example, such as “Aktara”, “Iskra”, “Proteus”.

It is, however, possible to exterminate aphids without using chemicals, especially if there are not many of them. The plant can be treated with infusion of wormwood (500 g per 3 liters of water) or celandine (250 g per 3 liters of water). For greater effect, 70-80 g of laundry soap should be added to the infusions of celandine and wormwood as an adhesive.

To prevent aphids from settling on tomato plants, you can periodically, about once a week, treat them with an ash solution, for which you need to dissolve 300 g of ash in a bucket of water and treat the tomato plants with this solution. For maximum effect, the solution should be allowed to sit for 48 hours so that the solution is saturated with ash components.

Spider mite

This pest also causes tomato leaf blades to curl as it sucks the juice out of them. The most common spider mite is found on tomatoes in a greenhouse; it also appears in open ground, but less frequently.

You can tell that it is a spider mite by looking at the leaf blades that are twisted and starting to dry out, and you can see a cobweb on the underside.

To combat mites, including spider mites, on tomatoes, acaricides are used, approved and modern: such as “Borneo”, “Flumite” or “Oberon”.

It is important to know that acaricides can be used no later than 20 days before the start of harvesting.

If you need to expel spider mites from tomatoes without the help of chemicals, you can treat the plants with dandelion infusion (500 g per 3 liters of water), onion feathers (500 g per 3 liters of water) or garlic cloves (10-15 cloves per 3 liters of water).

Curling of tomato leaves due to spider mites. © keith.hansen

8. Varietal feature

Some tomato varieties curl their leaves not because of some disease, pest or lack of element in the soil, but because this is their biological feature. The leaves curl to the greatest extent in the following varieties: “Fatima”, “Honey Drop”, as well as in the vast majority of cherry tomato cultivars.

Conclusion. When curled leaves appear on tomato plants, do not immediately reach for chemicals or fertilizers; first assess the conditions in which your plants are located. It often happens that they simply do not have enough moisture or, on the contrary, there is too much of it. Water if the soil is very dry, or stop it if there is excess moisture; carry out pinching, and only if all this does not help, try to apply fertilizers or carry out pest or disease control according to the schemes that we have described.

If you have any questions, we will be happy to answer them in the comments.

Kira Stoletova

There are many reasons why tomato leaves curl. Experienced gardeners, even with regular care of their vegetable crops, may encounter a problem when, for various reasons, the leaves of tomatoes curl in a boat on the upper crowns of tomato seedlings. Timely measures taken to save the plant help avoid losses

Bacteriosis

An infectious disease is one of the reasons why tomato leaves curl. Among the most common bacterial infectious diseases that cause tomato leaves to curl outward is cancer. Signs of infectious bacteriosis of tomatoes may include:

shredding of young fresh leaves at the top of a tomato bush,
reduction in the size of inflorescences,
absence of ovaries,
turning the leaf blade downward.

Infectious bacteriosis for tomatoes is a rather dangerous disease that causes verticillium wilt and the death of all planted seedlings in a fairly short time.

Spreaders of the bacterial infectious disease are infected seeds and pests, including aphids and whiteflies.

Treatment

It is almost impossible to cure tomato leaf curl due to bacteriosis. Most often, gardeners, instead of treating the disease, prefer to clean and remove damaged plants to avoid the rapid spread of bacterial infection to healthy tomato bushes. The soil is disinfected using antiseptics to remove pathogens of infectious diseases.

The most commonly used remedy to cure open soil contaminated with infectious bacteriosis is the drug Farmayod, which kills the source of the infection.

Irrigation violation

Among the non-infectious factors that can lead to curling of leaves in tomatoes is a violation of the watering procedure.

Lack of moisture

Lack of moisture is one of the possible reasons why tomato leaves curl down or up. This process occurs due to the plant saving the area of the leaf blade, from the surface of which moisture evaporates, and the bush begins to save fluid loss and roll up the foliage.

Treatment

To avoid the death of a vegetable crop, it is necessary to thoroughly water the lower part of the plant as quickly as possible and subsequently adhere to the basic rules of the watering procedure:

water at least once every 7 days,
limit yourself to two or three waterings even in severe dry weather conditions,
pouring at least 10 liters of water under each adult tomato bush,
avoiding moisture on the top parts of leaves and lower parts of plant stems,
reducing the volume of watering when the fruits ripen, which will certainly affect their integrity, otherwise they will begin to crack,
use for irrigation only settled water at room temperature.

When the leaves of tomatoes curl, turn yellow and wither, it is not recommended to water the bushes right away. It is necessary to restore the required moisture level gradually.

Excess moisture

If, due to a lack of moisture, tomato leaves curl downwards, then due to excessive amounts of water they turn yellow in the greenhouse and in the open ground and the tomato leaves curl upward. Signs that tomatoes cannot handle too much liquid include:

excessive soil moisture,
fragility of stems with no signs of lethargy.

Excess moisture is often observed during long-term or heavy rainfall. Tomato leaves curl in greenhouse conditions at high humidity levels.

Treatment

stop watering the tomato bushes completely for a while,
in order to protect against precipitation, stretch a film over tomatoes grown in an open garden bed,
If the humidity level in the greenhouse is exceeded, do regular ventilation.

Correctly prepared soil for planting vegetables can avoid problems with waterlogging of the soil. Tomatoes are planted in loose soil, for which large components, which include sand, sawdust or peat, are mixed into the soil before planting tomato seedlings. These components help absorb excess water faster, taking it into the deeper layers of the soil.

When planting areas are located in low-lying areas, gardeners try to sprinkle a handful of river sand in each hole when planting tomatoes so that the root system is not constantly in water.

Temperature violation

Tomato leaves begin to curl upward when the plant is in too hot temperature conditions. From intense heat, especially in greenhouses, the tomato leaves of the upper and lower tiers wither and curl inward into tubes along the central leaf vein.

An indicator of leaf curling due to high temperature can be their freshness at night - leaves begin to unfurl spontaneously during the cool period of the day.

Treatment

For tomatoes grown in a greenhouse and on unprotected soil, immediate measures are taken to restore the condition of the foliage:

the greenhouse room is ventilated and a draft is created,
mulch the soil with a thick layer of organic matter, including sawdust, straw, pine needles, humus,
creating shade on top of tomato bushes by using covering material,
daily spraying of urea in the evening in a proportion of 1.5 tbsp. l. per 10-liter volume of liquid or a weak solution with potassium permanganate,
regular watering.

Wrong bait

Improper nutrition of tomatoes is also one of the reasons for the disturbance in the appearance of foliage.

Lack of fertilizers

Insufficient supply of mineral elements for tomatoes results in curling and wilting of the leaves. The appearance of the plant allows you to determine which nutritional components the tomato bushes lack:

when the leaves curl downward and become gray-green with bright purple or red central veins, this is a sign that the tomatoes are deficient in phosphorus,
If fresh young leaves curl upward from the edge to the middle of the leaf blade, become first curly at the top, then flaccid, and vegetables become covered with white spots, this is due to a lack of potassium.

Treatment

It’s easy to cure tomato bushes from curled leaves: just add bait with the missing nutrients. Superphosphate, potassium nitrate and other fertilizers containing phosphorus and potassium are suitable for this purpose.

A good top dressing, which contains the necessary useful elements for feeding tomato bushes, is simple wood ash. Watering and spraying plants with ash diluted in water is a quick fix for wilted tomato foliage.

Excess fertilizer

Overfertilization of the soil can also be a provoking reason why the leaves of tomatoes curl. This usually happens when there is a lot of nitrogen in the soil. A sign of excess nitrogen along with curled leaves is thickening of the plant stem and smaller tomato inflorescences or their complete absence on tomato bushes.

Treatment

Abundant watering with plain water can reduce the amount of nitrogen-containing component contained in the soil.

Violation of stepsoning

The formation of tomato bushes is not required for all varieties of tomatoes, however, in species that require pinching, failure to perform this procedure may be the reason why the tomato leaves curl. If the rules for the formation of bushes are violated, including when many shoots are removed at once during pinching or overgrown shoots that have reached a length of 5 cm or more are cut off, the plant experiences significant stress. As a result, the tomato bush curls its leaves, and sometimes can drop flowers and even get rid of ovaries.

Treatment

When pinching, you must follow the basic rules for the formation of tomato bushes:

young shoots that have not reached 5 cm in length are removed,
stepsons that are too short do not break off, because it is faster to heal a fresh wound if it is formed with a remaining part of about 1 cm,
pinching is carried out in the morning to give fresh cuts time to dry and weather before evening,
Before planting, the tomatoes are watered, which makes the stem more fragile and brittle, and the process of tearing off the shoots less labor-intensive and traumatic.

In the case of an existing violation of the pinching procedure, plants can be restored by improving their care, including ventilation of greenhouse premises, proper watering and fertilizing using biostimulants.

Presence of pests

Insects present on tomato bushes: aphids, spider mites, whiteflies cause tomato leaves to curl. Insects suck out all the juice from the leaf blade, it thins out and becomes lifeless, dries out and curls up into a tube.

Viral diseases of tomatoes

In addition to viral and fungal diseases, there are also insects that cause considerable harm to the plant. Today, the following are quite common:

As for

bacterial cancer.
Stepsonning must also be done very carefully. Get rid of only those side shoots whose length exceeds 10 cm.

As a rule, when transplanting tomatoes into a greenhouse, many summer residents try to feed it with various organic fertilizers. At the same time, in an effort to do better, they do not notice that they are over-saturated the soil.

Impact of adverse weather conditions

Spider mite.

At the beginning of its development, the disease resembles late blight and bacterial spot. The underside of tomato leaves becomes covered with brown spots. They quickly increase in size and spread to the stems and fruits. The affected part of the surface appears depressed. The spots on leaves and stems are oval in shape, and on the fruits they are round. Measures to combat this tomato disease are spraying infected plants with Antrakol, Consento, Tattu.

Young plants 3 weeks after planting are sprayed with Zaslon to prevent late blight, and a week later - Barrier.

If appropriate measures are not taken, infected plants may die before the ovary appears.

Disease-resistant tomato varieties

- Blitz. They are grown in open ground and in greenhouses. Compact bush with fruits weighing 80-90 g. Resistant to tobacco mosaic virus, fusarium and late blight;

Why do tomato leaves curl and what to do in this case? This question often worries gardeners. After all, this condition of tomato leaves can affect the future harvest.

Medvedka

brown spot

If a plant is affected by a disease such as bacterial canker, the main symptom is leaf curling. In bushes affected by these pests, the leaves turn upside down, quickly wither and dry out. And on the back side you can see small cracks.

Various insects that attack plants can also cause curling. Such pests include aphids, spider mites, and whiteflies. In this case, the leaves curl with their tips up.

Important information: do not use slurry or poorly rotted manure as soil fertilizer in the greenhouse. When combined with soil, they produce large amounts of ammonia, which can not only cause burns, but also lead to the death of fruits.

The small insect looks like a light dot on tomatoes. It entangles the leaves in a web and sucks the juice from them. Punctures made by the insect are visible on the upper side of the leaves. The affected tissues in their area turn yellow and merge into spots. Then the leaves dry out. To combat spider mites, tomatoes are sprayed with Karbofos or an infusion of garlic and dandelion leaves with the addition of liquid soap.

Bacterial spotting.

Then, with an interval of 1 week, the tomatoes are treated twice with Oxyx. Garlic infusion is effective in the fight against late blight.

But even having successfully overcome the entire path of cultural development, one cannot relax. Diseases and pests of tomatoes threaten to destroy not only the leaves and stems, but also the almost ripe crop.

MegaOgorod.com

Measures to combat diseases and pests of tomatoes

- Charisma F1. Grown in greenhouses. High-yielding with fruits of about 170 g. Resistant to cold weather, tobacco mosaic virus, fusarium and cladosporiosis;

Viral plant diseases often resemble physiological disorders in their external signs. In both cases, there is a change in the color of the leaves, their twisting and folding.

whitefly

Curling of leaves due to viral diseases of tomatoes

, then this fungal disease first damages the lower leaves during flowering and fruit set, and then the upper leaves during ripening of the berries. A tomato can become infected with this disease in conditions of high air humidity (more than 70%). In order to prevent the appearance of this fungus, the gardener needs to regularly change the soil in greenhouses or greenhouses and burn plant waste. In addition, products such as Fitosporin or Fundazol are very effective. If you notice similar signs on some tomato bushes, be sure to remove these plants from the greenhouse. Treat the sections with a solution of copper oxychloride (60 g of product per bucket of water), pour the root generously with the mixture. All plants located within an area of 10 meters from the affected bush also need to be treated with a solution of copper oxychloride, only in a different concentration (40 g of product per bucket of water).

How to get rid of pests? The seedlings should be treated with an insecticidal solution. A decoction of chamomile flowers or tobacco infusion will also help to cope with insects. If you notice curled leaves on the seedlings, as well as thickening of the stem, most likely there is excess nitrogen in the soil. Sprinkling the soil with stove or wood ash will help remove it. Also spray the seedlings:

Tomato diseases and their control

Medvedka. Leaves and fruits of tomatoes are affected. First, small round brown spots appear on the lower surface of the leaves. Then they merge and take on an irregular shape.

Top rot. Streak (streakness).

- Virtuoso F1. Easily tolerates humidity and sudden temperature changes, and is resistant to late blight. The fruits are large, do not crack, weighing 160 g. Tomatoes of this variety are grown in greenhouses;

Leafroll virus (FLV) is caused by two viruses, K and L:

scoop

MacrosporiosisTobacco mosaic virus causes leaves to curl in tomatoes. At the same time, you can see a peculiar mosaic pattern on them. Unusual bubbles that appear on the leaves are also a symptom of the disease.

If you notice that the leaves of tomatoes are curling, pay attention to the temperature inside the structure. If it’s above 35 degrees, that’s the reason. And monitoring the plants throughout the day, when the temperature is high, and at night, when it drops, will finally help you to be convinced of this. If the leaves really curl due to the heat, then at night, feeling pleasantly cool, they will straighten. with a solution of ash (1 tbsp per bucket of water);

A large brown insect, up to 5 cm long, with powerful front legs and short elytra. It makes passages in the root layer of the soil and makes burrows at a depth of 10-15 cm. The mole cricket gnaws the roots of young vegetable crops and causes their death. To combat harmful insects, use the drug Thunder, an infusion of hot pepper or a vinegar solution. On the fruits, similar spots at first become large and darken, and the tissues around them lighten, forming a border.

As you can see in the photo, this tomato disease is characterized by the appearance of dark green weeping spots on the top of unripe fruits. The affected tissues darken and become hard, the fruits ripen faster. Sometimes signs of fruit damage are noted only on the cut. Low-lying fruits are most often affected. Plants are watered moderately and regularly. In autumn, dolomite flour, lime or chalk is added to the soil in the beds to replenish calcium. In the spring, when planting, deoxidizing fertilizers are added to the holes. The stems and fruits of the affected plants are covered with yellowish spots in the form of stripes. With this tomato disease, the leaves become curled and drooping. Flowers and fruits fall off from diseased bushes. With extensive damage, plants die completely. Insufficient lighting contributes to the development of the disease. To prevent the proliferation of this viral tomato disease, the crop is not planted next to other plants of the Solanaceae family; distances between plants are maintained when planting.

- Bohemia F1. A low-growing hybrid that is grown in greenhouses and open ground. Fruits reach 140 g. Resistant to major diseases; virus K (mosaic leaf curl) manifests itself in the form of weak spotting and curling of the upper young leaves with wavy edges. It can also affect the root system without any symptoms. The virus is transmitted through seeds and contaminated soil;

The cutworm is an insect that damages, in whole or in part, the leaves and stems of a tomato. This pest is quite common. In order to prevent its occurrence, the gardener is recommended to spray the plant with the biological preparation "Strela". To prepare it, you need to add 50 g of powder to 10 liters of water). In addition, the owner of tomatoes needs to regularly clear the land of weeds and dig up the soil. , in turn, also contributes to damage to the leaves. This fungal disease is characterized by the formation of round brown spots that soon merge. This is how the leaves of the plant die. In addition, macrosporiosis affects the stem and fruits. Dark round spots appear on the surface of the berries. The ideal environment for the habitat and spread of such a fungus is considered to be high humidity and strong wind. The main measure to combat this disease is to treat the plant with a copper-soap emulsion. To prepare such a product, the gardener will need 10 liters of water, 200 g of soap and 20 g of copper sulfate. As for already affected tops, the most convenient and effective way to eliminate them is burning.

Tomato leaves curl as a result of a fungal infection - fusarium. In this case, the older, lower leaves are affected first. Gradually the process moves higher and higher, eventually causing the upper shoots to wither. If you notice signs of fusarium on the seedlings, it should be removed and burned, and uninfected bushes should be treated with an antifungal agent. Do not ignore the disease and take preventive measures, otherwise all the plants in the greenhouse will die not only this year, but also next year.

Provide the tomatoes with fresh air and protect them from the sun by covering the greenhouse with non-woven material, and the problem will go away.

a solution of potassium sulfate or monophosphate (1 tsp per 10 liters of water).Wireworm.

Protection of tomatoes during pest control

First, the affected leaves wither, and then the entire plant. Treating tomatoes against this disease when the first signs appear is done by spraying the plants with a solution of Bordeaux mixture, copper sulfate, and feeding them with fertilizers containing copper and nitrogen. Wilting bushes are destroyed. Cladosporiosis (brown spot).

Verticillium wilt.- Opera F1. Grown in greenhouses. The plant is 1.5 m high and has an average fruit size of 100 g. Resistant to many diseases;

L virus. Most common in Europe. They are imported to us mainly with Dutch seeds that have not been treated with antiviral drugs. In the first year of planting such seeds, the virus manifests itself exactly like virus K. And the next year, the lower leaves are affected: they curl into a shuttle, and then into a tube. Next, the upper leaves are affected and as a result, they all lose their elasticity. The virus is not transmitted by contact from a diseased plant to a healthy one. As for the mole cricket, this insect damages the stems and roots of tomatoes. To get rid of this pest, the tomato owner needs to use a product called “Thunder.”

Tip: treating the leaves with a urea solution will help remove heat-induced curling in tomatoes. Dissolve 1.5 tbsp. l. products in a bucket of water and apply in the evening. And after a couple of days, spray the seedlings with a weak solution of manganese. If there is not enough in the tomatoes:

The pest is a click beetle larva. They are distinguished by a dense yellow body and do not exceed 2 cm in length. Wireworms damage the roots of tomatoes and sometimes penetrate the stems. 3-4 days before planting tomatoes, bait for the pest is placed in the soil. Pieces of carrots, beets or potatoes are strung on sticks 16-20 cm long and buried in the beds. Before planting the seedlings, the pest is destroyed. To protect tomatoes from these pests, use the drug Bazudin and lime the acidic soils. Blackleg.

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Why do tomato leaves curl in a greenhouse?

In tomatoes, light gray blurry spots appear in the lower part in the form of a velvety coating on the underside of the leaves. Then the spots turn brown and spread to the upper part of the plant. Leaves with signs of disease dry out and the plant quickly dies. To prevent disease, seeds are treated before planting and watering is moderate. To treat tomatoes, when the first signs of cladosporiosis appear, they are sprayed with Hom and Oxyx.

Root damage

The lower leaves on the affected bushes turn yellow, wither and fall off prematurely. With this disease, leaves curl, and diseased bushes are inhibited in growth and development, but remain viable. On sections of stems and leaf petioles, brown outlines of blood vessels are visible. To prevent the disease, plant debris is removed from the beds, planting and care rules are followed when growing tomatoes, and fertilizing is carried out in a timely manner to increase the plants’ resistance to infection.

- Vologda F1. Grown in greenhouses. Carpal with round smooth fruits weighing about 100 g. Resistant to tobacco mosaic, cladosporiosis and fusarium;

Lack or excess of nutrients

Leaf curl virus is an insidious disease because it has no cure. The only way out of this situation is prevention, which consists of treating the planting material: tomato seeds are treated with 20% hydrochloric acid for 30 minutes and then washed with running water.

Whitefly is also considered a rather dangerous pest that lives on tomato foliage. Moreover, this insect spreads sooty fungi. It is they that provoke the drying of the leaves and the death of the plant. The main measure to combat whitefly is the use of the domestic product “Fosbecid” (10 ml of the drug is needed per 10 liters of water). It is necessary to spray tomatoes with this solution 2 times per season in the morning or evening with an interval of 15-20 days.

Mosaic, in turn, is considered one of the most dangerous diseases for tomatoes. Not only greenhouse tomatoes can become infected with it, but also those outdoors. This tomato disease curls the leaves, after which they fall off. If not treated in a timely manner, the mosaic affects the plant as a whole, after which it dies. To prevent this disease from affecting healthy bushes, the gardener needs to rid the plot of land of already damaged plants as soon as possible. In addition, he can spray tomatoes using skim milk. To avoid this infection, he is also recommended to treat the seeds with a solution of potassium permanganate (1 g of the substance per 100 ml of water) before sowing. These steps should be performed because mosaic is a seedling disease. To prevent tomatoes from being exposed to such an infection, the gardener should give preference to hybrid varieties during sowing.

Before treating tomatoes for diseases, the gardener needs to know what diseases occur and how to determine their presence.

Improper care of tomatoes can also cause curling.
phosphorus - leaf blades acquire a gray tint, and the veins become red-violet;

Gnawing owls.

The disease usually affects seedlings and young tomato bushes if not properly cared for. In the lower part of the stem, the tissues turn black, become thinner and dry out. The leaves of affected plants become covered with small dark spots. Usually tomatoes with signs of blackleg die. To combat the disease, seedlings are watered moderately, and the room in which they are located is regularly ventilated. To protect tomatoes from this disease, plants are watered with a solution of potassium permanganate (1-1.5 g of dry matter per 10 liters of water).
Fomoz (brown rot of fruits).
Cracking of fruits.
- Ural F1. High-yielding variety for greenhouses. Tomatoes are cold-resistant and resistant to fusarium, cladosporiosis, and tobacco mosaic. The fruits are large, weighing about 350 g;

Improper watering

Tomato leaves also curl due to reasons such as sudden changes in day and night temperatures, especially during high temperatures during the day and high humidity at night. During such unfavorable weather conditions for tomatoes, they are sprayed with the drug Epin, which has growth-stimulating activity and belongs to the class of natural plant hormones. As a stress adaptogen, Epin helps strengthen the immune system of tomatoes, making them more resistant to diseases and leaf curl.

What do you need to remember from the above?

Leaf curl in tomatoes can also be caused by a virus that can be transmitted through seeds. To prevent this from happening, the gardener is recommended to water the plantings and feed them with products containing microelements and copper.

Insects on plants

Many summer residents immediately after planting seedlings in a greenhouse remove all its lower leaves. This is a common mistake. They need to be plucked, this improves ventilation for the plant and reduces humidity. However, this should be done no earlier than the plant has completely taken root in its new “home”. And for this it should take about a month.

Heat

Potassium - its leaves, in addition to curling, become brown at the edges and the veins turn yellow;

The caterpillars of moths are dark gray or black, 3-4 cm long. They gnaw through leaves and their petioles, as well as tomato stems. To combat insects, the beds are weeded, the soil is dug deep in the fall, and the pest is collected by hand and destroyed. To destroy caterpillars, use the drug Strela.

Whitefly.

Improper care

Large brown spots with a diameter of 3-4 cm appear on tomato fruits. They are usually located next to the stalk. The affected area appears depressed. Rotting spreads into the fruit. The disease affects both ripe and unripe fruits. Excessive use of nitrogen fertilizers and high environmental humidity contribute to the development of Phoma. Affected fruits are destroyed. For this disease of tomatoes, to treat them, the bushes are sprayed with the preparations Hom, Oxyx, and a solution of Bordeaux mixture.

The cause of damage to tomatoes is excessive watering, especially after drought. Unripe fruits are most often affected. Infection penetrates into the cracks and the fruits rot or grow of poor quality. To preserve the harvest, it is necessary to adjust the watering regime.

- Spartak F1. The bush is tall with large ribbed fruits weighing about 200 g. Resistant to fusarium, cladosporiosis and tobacco mosaic.

Tomato diseases

If tomatoes are grown in a greenhouse, then curling the leaves inward means an excess of moisture, and curling upwards means a lack of moisture.

To prevent diseases of seedlings, as well as their pests, from causing crop loss or death of a given cultivated plant, the gardener needs to remember the following important points:
to contents
Late blight

Important: pick no more than two lower leaves per week. Removing a large number of leaves at once can cause tomato disease.

boron - yellowing of the middle leaves of the plant occurs;

Tomatoes are a very demanding crop that requires constant care. Even with a slight deviation from the norm in caring for them, problems can arise, for example, leaf curling. If you notice this phenomenon, you need to take action. But in order to fix the problem, you must first find the cause. Let's find out the most common ones.

This tomato pest with two pairs of white wings causes patchy yellowing of leaves. Gradually the leaves turn completely yellow and wither. The pest covers the plant with secretions on which sooty fungi multiply. As a result, the diseased plant turns black. To combat insects, the drug Confidor is used.

Fusarium wilt.

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Tomato diseases and pests and their treatment

Late blight (brown rot).

Leaf diseases

Diseases and viruses can be present in purchased seedlings, so experienced gardeners grow seedlings themselves from seeds treated with an antiviral agent. Diseases and viruses are also killed in planting soil by pouring boiling water over it. Such activities will protect you from diseases and the leaf curl virus.

Curling of leaves can also occur when there is an excess amount of nitrogenous substances in the soil. Viral diseases are often characterized by clearing along the veins, this gives the plant a special network appearance. In cases of mineral nutrition disorders, clearing often occurs between the veins. By external signs, it is not always possible to distinguish viral pathology from a lack of nutrients important for the plant in the soil. In order to protect the tomato from diseases, the gardener is obliged to rid the soil of already damaged plants and use special products (for example, "Fitosporin" or " Fudazol").

There are ailments that cause diseases in tomato fruits. The most common disease is blossom end rot. This disease affects both green and almost mature berries. It is characterized by the appearance of brown, flat, concentric and somewhat depressed spots on the fruit. After infection with this disease, the berry first becomes very soft and then rots. The main reasons for its appearance are considered to be too high a temperature and too low humidity in the greenhouse. Lack of calcium also contributes to the development of blossom end rot. In order to prevent its occurrence, the gardener must add phosphorus-potassium fertilizers to the soil. They increase resistance to the occurrence of this disease. is a rather dangerous fungal disease that can damage tomato foliage. The first signs of the appearance of this disease are the formation of dark brown spots on their surface. Soon this fungus spreads to the fruits of the plant. In order to prevent the occurrence of late blight, the owner of tomatoes needs to spray them every 2 weeks with garlic infusion during fruit set. In addition, Bordeaux mixture is considered to be a fairly effective prophylactic agent. When the first signs of this fungal disease appear, the gardener needs to treat the tomatoes with a solution of table salt (10%).

In addition to unfavorable external factors, the reason why tomato leaves curl may be inside the plant - these are diseases. Diseases are caused by various types of fungi, viruses and bacteria. The most common lesions of tomatoes are: copper - young leaves curl first, yellow spots appear on them, which darken after a while. If some time after planting the tomatoes in the greenhouse you notice that the leaves are curling into a tube, it is most likely In total, the roots were damaged during the planting process. As a result, the plant stops receiving the necessary beneficial components from the soil, which leads to this unpleasant problem.

Slugs.Affected tomatoes are characterized by the appearance of yellow and wilting leaves at the bottom of the plant. Then the leaves wither on all branches. On the cut of the stems, dark contours of the vascular pattern are visible. A pink coating appears in the area of the root collar of tomatoes. Excessive soil moisture and high nitrogen content contribute to the development of the disease. To prevent fusarium wilt, the rules of crop rotation are followed, the bushes are hilled up, adding soil to a height of 15 cm. To combat this tomato disease, the plants are fed with the Barrier preparation and sprayed with the Hom preparation.

Curling leaves

With this disease of tomatoes, brown or brown spots of indeterminate shape appear on the leaves, stems and fruits. The underside of the leaves is covered with a white coating. Gradually, the affected part of the fruit increases more and more.

You should not worry if the top has curled leaves in the morning, but in the afternoon they straighten out, if the flowers are bright yellow, two flowers bloom at once in a cluster, if the fruits are larger at the base of the cluster, and the clusters are located at an obtuse angle to the stem.

If leaf curling is not caused by viruses, then the tomatoes do not die, but only lose their appearance and bear less fruit.

Fruit diseases

In addition to diseases, there are also pests that also lead to loss of yield or death of the plant.

Gray or white rot of fruits is also considered a fairly common disease. It usually develops at the base of the berries. The most effective and reliable remedy for tomato diseases is Fitosporin.

Streak

late blight;

Pests

Tomatoes are extremely demanding when watering. They cannot tolerate not only overdrying, but also excess moisture. Overwatering causes leaves to curl. In this case, the roots are not able to develop normally, and as a result, the plants do not receive all the necessary beneficial components.

Fortunately, this reason resolves itself. In a week or two, when the plants acclimatize to the new conditions and the root system is restored, everything will return to normal.
The pest eats the leaves and fruits of tomatoes. Damaged parts of plants are susceptible to rot. To combat the pest, the soil around the bushes is sprinkled with a mixture of ash, tobacco dust and lime, or freshly prepared slaked lime is sprayed around the beds. To combat these tomato pests, the soil under the bushes is loosened after watering and sprinkled with ground hot pepper (1 teaspoon per 1 m2).
Alternaria (dry spotting).

To prevent the disease, do not plant tomatoes next to potatoes, follow the rules of crop rotation, and fertilize with phosphorus-potassium fertilizers.

Like many other crops, tomatoes are susceptible to the harmful effects of diseases and pests. For this reason, tomatoes need agrotechnical protection throughout the entire growth period - from planting seeds to harvesting.

In order to avoid various diseases and get the desired result, you should plant tomato varieties that are resistant to diseases and adverse weather conditions. These are varieties such as: To prevent viral diseases from infecting the bush, its owner needs to monitor the air temperature and humidity of the greenhouse. In addition, fruit cracking is a fairly common disease. It is observed in pink-fruited tomatoes. In order for such varieties to be resistant to cracking, the gardener should use products such as Tarpan F1 or Tech 2721 F1. If the berry is damaged, then it must be immediately picked from the bush.

, in turn, refers to viral diseases that occur due to frequent precipitation in the summer. This disease is characterized by the appearance of brown spots on the foliage. In addition to leaves, streaking negatively affects the condition of fruits. They first become hard and then soften. To prevent the occurrence of such a viral disease, the gardener must use a solution based on potassium chloride (0.4% concentration).
tobacco mosaic virus;
If you notice that the leaves are curled into a boat, you should know that the seedlings need to be watered more. Just don't flood the plants with water. First, loosen the soil well, and then provide abundant watering at the root.

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A lack of nutrients in the soil can cause the leaves of seedlings to curl. But it turns out that an excessive amount of them can also lead to disastrous results. You can understand what is tormenting your tomatoes or lack of overfeeding after observing the seedlings.

Similar articles and the leaf turns upward when overfed with nitrogen - and because of this it is hard - it ages quickly

Varietal feature

late blight;

High air temperature

Various insects that attack plants can also cause curling. Such pests include aphids, spider mites, and whiteflies. In this case, the leaves curl with their tips up.

Lack of moisture

If there are not enough tomatoes:

Excess moisture

If some time after planting the tomatoes in the greenhouse you notice that the leaves are curling into a tube, most likely the roots were damaged during the planting process. As a result, the plant stops receiving the necessary beneficial components from the soil, which leads to this unpleasant problem.

Pests: aphids, whiteflies, red spider mites

Let's try to understand the reasons why this phenomenon may occur. If you know why it happened, you can take some measures to prevent this process.

6. A lack of fertilizers is just as destructive as their excess. If tomato leaves curl upward, this is a sign of calcium deficiency. Growth slows down, leaves become deformed, and fruits are affected by blossom end rot. Top rot speaks for itself. Light watery spots first appear on the fruits, which gradually darken. When the fruit ripens, dead tissue forms under the spot.

Too little is bad, but too much is even worse. Excessive application of manure (especially fresh), watering with slurry undiluted to the required concentration or herbal infusions leads to the fact that the plant can no longer absorb as many nutrients and curls the leaf to reduce photosynthesis. And, in addition, evaporation and ammonia released from the fermentation of organic substances lead to burns, causing the leaves to curl and die.

Nutrient deficiencies

The situation can be corrected with properly selected fertilizing. If you determine exactly which microelement is missing and why, then a universal way is to spray with a solution of immunomodulators: in hot weather - Zircon; in cool and rainy weather - Epin; between them - use Mortar (2 tablespoons per bucket of water) for general fertilizing.

If it doesn’t help, use one of the modern drugs, for example, Bankol, Akarin, Karbofos (Fufpnon), Actellik. Systemic preparations such as Aktara, Tanrek, Biotlin cannot be used for plants where tomatoes have already started, since toxic substances can accumulate in the fruits for 2-4 weeks.
Beloved by almost everyone, every summer resident and gardener tries to grow such a tasty and healthy vegetable as a tomato. And on balconies you can increasingly see a flowerpot or tub in which red, pink or yellow tomatoes are ripening. But you can’t do without problems with this plant - it is very delicate, susceptible to many diseases, and is often affected by pests.
"There are many reasons why tomato leaves curl. First of all, this happens due to a violation of the temperature and humidity conditions. Sometimes the leaves curl into a tube at too high a temperature. Elevated temperatures, 35 ° C or more, which often occur under a film in a greenhouse, intensify respiration process, and a rapid breakdown of nutrients occurs, while the absorption and accumulation of these substances at this temperature drops sharply.The leaves starve and begin to curl.This is especially dangerous when the roots are in the cold and the tops are experiencing high temperature stress. In hot weather, it is necessary to intensively ventilate greenhouses, creating drafts, shading plants, and whitening glass with chalk.
tobacco mosaic virus;
How to get rid of pests? The seedlings should be treated with an insecticidal solution. A decoction of chamomile flowers or tobacco infusion will also help cope with insects.
phosphorus - leaf blades acquire a gray tint, and the veins become red-violet;

Fortunately, this reason resolves itself. In a week or two, when the plants acclimatize to the new conditions and the root system is restored, everything will return to normal.

Thin leaf virus

The first reason is quite banal: the plant is simply hot, it lacks water. As a rule, the lower leaves of such tomatoes do not curl, as they are shaded by the upper leaves.

7. Phosphorus starvation leads to the coloring of tomato leaves in a gray-green color, and also causes the leaves to curl.

Bacteriosis of tomatoes

If the leaves of tomatoes that were recently healthy and strong suddenly curl up in your beds, this indicates that the plant is experiencing discomfort. The first step is to figure out what factors could lead to such a result.

Incorrect stepsoning

Excess of organic fertilizers

bacterial cancer.

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Tomato leaves curled. What to do?

Potassium - its leaves, in addition to curling, become brown at the edges and the veins turn yellow;

The second reason is incorrect, excessive feeding. Excessive nitrogen content in the soil leads to the fact that the stem of the bush becomes thick and powerful, but at the same time the leaves of the tomatoes curl. This problem is fairly easy to fix. To do this, you need to water the soil generously several times: the water will wash away the excess fertilizer. The main thing is not to overdo it, since stagnation of water is extremely undesirable: it can cause rotting and fungal infection. If you are afraid to overdo it with “water procedures”, simply balance the excess nitrogen with potassium. You can feed the plant with potassium sulfate, or you can fertilize the soil with ash, which also contains this substance.

8. If young leaves are the first to suffer (curl down), then this indicates a lack of copper, boron or sulfur.

Possible causes and ways to eliminate them

If this does not help, then it is better to remove the plant from the garden and burn it so that the virus does not spread.

With a lack of phosphorus, they become red-violet, especially on the lower side and veins, and the upper part seems to turn gray;

There are quite a lot of varieties of tomatoes, especially tall ones (indeterminate), with thin stems and leaves, heavily cut and hanging or slightly curling downwards. This is not a disease - you just need to know that such popular varieties as Fatima, Japanese crab, Oxheart, Honey Drop, and a good half of cherry tomatoes have this feature. When planting seedlings, pay attention to the condition of the leaves - if they are equally thin and slightly curled on all bushes - there is no need to worry about why the leaves are curling.

Leaves also curl downward during phosphorus starvation. The upper part of the leaf becomes gray-green, the veins are purple-red. Young leaves also bend downward when there is a lack of sulfur. Later, necrotic spots develop on them. Young leaves curl inward due to boron deficiency. The middle leaves turn yellow and the veins turn purple. The same picture is observed with an excess of boron, with the difference that the curved lobes of the leaves become dry, like paper. Although the top of the plants has an almost normal appearance, it then also curls. When there is an excess of zinc in the soil, old tomato leaves bend strongly downwards, the underside of the leaf turns purple, starting from the edges to the center of the leaf.

Provide the tomatoes with fresh air and protect them from the sun by covering the greenhouse with non-woven material, and the problem will go away.

boron - yellowing of the middle leaves of the plant occurs;

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Why tomato leaves curl: main reasons

The third reason that causes tomato leaves to curl is black aphids. It is difficult to detect her when she has just chosen a bush. As a rule, this pest prefers to settle in the axils of leaves, later moving to the leaves and stem themselves. Black aphids suck all the juices out of the plant, in return injecting a substance that causes the tomato leaves to curl. Due to the fact that the pest settles precisely in the sinuses, it is quite difficult to destroy it with insecticides: you will have to carefully spray the entire bush, paying special attention to all folds.

9. Aphids or whiteflies. If, upon closer examination of the curled leaves, you find these pests, then you should treat the tomatoes with a special solution as quickly as possible.

1. This is usually how tomatoes react to temperature and humidity disturbances. High temperature (above 35 degrees) has a bad effect. With such heat, nutrients quickly decompose. The plant absorbs many times less nutrients and has difficulty assimilating them. Starvation of the leaves occurs, and, as a result, the plant dries out and loses leaves and flowers. Due to too frequent and abundant watering, the plant develops a weak root system, which also entails curling of the leaves.

Sick tomatoes grow poorly, they have shortened shoots, small and ugly flowers, and the leaves curl, as a rule, only adult plants. The young ones simply grow thin and heavily feathered. The disease is transmitted by seed, with diseased plants infecting the soil. It is almost impossible to cure such tomatoes - just remove and then disinfect the soil with a solution of potassium permanganate and then sow mustard as green manure - its phytoncides kill pathogens, and the green mass, after overheating, will become an excellent source of humus.

with a lack of zinc, the leaf bends down, the tops of the shoots also curl and become rough and brittle;

Curling of leaves in tomatoes is often observed in hot summer weather, especially when dry winds blow. In this way, the plant tries to reduce the area of evaporation of such valuable moisture. Usually in the evening, at dusk, the leaf unfolds and becomes its normal shape in order to receive more dew at night and restore balance. There is only one way to help the plant - shade it. For this purpose, both in open beds and in a greenhouse, white spunbond or lutrasil, thrown over the plants at midday, is excellent. But we strongly advise against watering tomatoes by sprinkling. If you do this in the sun, the leaves get burned from drops of water acting like miniature lenses, and if you refresh them in the morning or evening, this is a direct path to late blight. We also recommend that you always mulch the soil in the beds and in the greenhouse. 8-10 cm of mown grass or forest litter will significantly cool the roots in the hottest weather and the plant will be much more comfortable.

Young tomato leaves curl in the form of a tube towards the midribs due to a lack of copper. The petioles are bent downwards. Later, chlorosis and necrosis usually develop on these leaves.

If you notice similar signs on some tomato bushes, be sure to remove these plants from the greenhouse. Treat the sections with a solution of copper oxychloride (60 g of product per bucket of water), pour the root generously with the mixture. All plants located within an area of 10 meters from the affected bush also need to be treated with a solution of copper oxychloride, only in a different concentration (40 g of product per bucket of water).

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Why do tomato leaves curl in a greenhouse?

Root damage

copper - the young leaves curl first, yellow spots appear on them, which darken after a while.

Lack or excess of nutrients

And finally, the most unpleasant reason is the curly hair virus. This disease can affect not only tomatoes, but also other plants located nearby. There is no way to cure the plant. A diseased bush must be immediately removed from the garden, as it serves as a source of spread of the virus.

In any case, all kinds of fertilizers must be used in optimal proportions.

2. Are the leaves of tomatoes growing in greenhouses curled? In such cases, you need to ventilate the room to create a uniform temperature. Since the temperature underground is quite low compared to the surface heated by the sun, the plant begins to hurt.

If, after sprinkling, the tomato leaves are wrapped in a funnel, it means that you have overdone this manipulation.

curling of young leaves and their lightening indicates a lack of boron;
This is the most common reason why leaves curl in tomatoes. Many vegetable growers either do not pay attention to watering at all, hoping for rain, or do it incorrectly - water often, but in small portions. But this way only the top layer of soil is wetted - 3-5 cm, and the roots are mainly located deeper, and the tomato suffers from a lack of moisture. Proper watering should be done once every 2-3 days on uncovered beds and once every 5-7 days on mulched ones, but at the same time you need to pour a bucket of water on the fruit-bearing bush. This should not be done at the same time, but divided into several portions so that the water does not spread to the sides, but all gets to the roots.

Lack of calcium in the soil affects plants by deforming tomato leaves and curling them upward. At the same time, the leaves become smaller, the growing point dies, and later blossom end rot appears on the fruits. The edges of the leaves “curl” due to a lack of potassium. Necrosis subsequently develops on older leaves. The smallest veins turn pale, and the edges of the leaves turn brown. With an excess of manganese, which is often abused by gardeners due to its availability, young leaves become wrinkling rather than curling. They are more intense in color. "

Tobacco mosaic virus causes leaves to curl in tomatoes. At the same time, you can see a peculiar mosaic pattern on them. Unusual bubbles that appear on the leaves are also a symptom of the disease.
Improper care of tomatoes can also cause curling.
Tomatoes are extremely demanding when watering. They cannot tolerate not only overdrying, but also excess moisture. Overwatering causes leaves to curl. In this case, the roots are not able to develop normally, and as a result, the plants do not receive all the necessary beneficial components.
If you notice curled leaves on the seedlings, as well as thickening of the stem, most likely there is excess nitrogen in the soil. Sprinkling the soil with stove or wood ash will help remove it. Also spray the seedlings:

Improper watering

How to recognize the curly hair virus? According to the appearance of the tomato: the upper leaves of the bush curl, the central shoot stops growing, the young foliage acquires a sickly light green or yellow tint, the plant begins to rapidly lag behind its fellows in development.

All of the above reasons allow us to give a detailed answer to the question of why the tomato leaves curled. Pay attention to the signals that the plant gives, try to decipher them correctly, then you can boast of the richest harvest.

3. Another reason why tomato leaves curl may be bacterial cancer. This disease can be distinguished by the appearance of ulcers and cracks on the stems. If the leaves of tomatoes turn yellow, wither and dry out, this may also be the result of a disease.

Insects on plants

Firstly, we missed the optimal time when the stepchildren reached 5-7 cm in length.

Chopping the shoots, wrapping the leaves in a tube is a sign of copper and sulfur deficiency;

Heat

An excess, like a deficiency, can cause the leaves of tomatoes to curl, but only their edges curl up. During prolonged rains in clay soils, water slowly sinks to depth, and the roots of tomatoes literally suffocate from lack of air. This problem can be avoided even during the period of planting seedlings by filling the hole with loose soil. And during the growing season, make small grooves from the bushes to the side to drain water from the roots.

Excerpt from an article by Candidate of Agricultural Sciences Lebedeva.

Improper care

If you notice that the leaves are curled into a boat, you should know that the seedlings need to be watered more. Just don't flood the plants with water. First, loosen the soil well, and then provide abundant watering at the root.

ash solution (1 tbsp per bucket of water);

Tomato diseases

So, these are all the main reasons why tomato leaves can curl. Care for the plant carefully, follow all the rules of agricultural technology for this crop. Then this problem will bypass you.

There is nothing tastier than your own tomatoes, grown with love. Such vegetables will not only be tasty, but also healthy. After all, if you grow vegetables for yourself, then, as a rule, you do not use harmful insecticides. And you handle fertilizers extremely carefully, because their excess can begin to accumulate in the fruits, changing the taste not for the better. In general, homemade vegetables grown with your own hands are the best.
4. Too much zinc. Nutrients in unlimited quantities can become destructive for such a plant. Signs of this problem include the bottom of the leaves turning purple and the edges curling.
Secondly, too many vegetative parts were removed at the same time.

With a lack of calcium, the edges of the leaflets curl upward, and they become pale in color, the veins turn white, and necrosis begins;

These garden pests rarely, but still affect tomatoes, especially when the beds are large, as well as in a greenhouse. They settle on the underside of the leaves and actively suck out the juices, as a result of which the leaves curl inward, turn yellow, and necrotic spots and nodules appear. Having discovered pests, you need to urgently save the plant.

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