Vegetables

Why do tomatoes curl leaves and how to deal with it correctly

Despite the fact that tomatoes require constant care, and they cause a lot of trouble to gardeners, many gardeners are willing to spend time and energy on their cultivation. One of the most common problems of this culture is twisting the tops. Twisted leaves interfere with full-fledged photosynthesis, and the plant begins to wither from a nutrient deficiency.

Irregular watering and root damage

If, by planting tomato seedlings, you notice that the leaves on it change, the root system is most likely damaged and the plant is undernourished. The reason may be that the seedlings have outgrown and its roots have grown damaged. Need some time to wait until the plant adapts. When it takes root and repairs the damage, the leaves are likely to take normal form.

One of the causes of leaf curling is excessive or insufficient moisture. The plant, thirsty, in order not to die, evaporates less moisture, but its leaves curl inside. To avoid this, you should water the plant little by little, but often.

Excessive watering can also cause leaflets to curl. Tomatoes can suffer due to frequent and strong natural precipitation and their leaves roll up their edges. If the cause of this phenomenon is the stagnation of moisture in the soil, it is necessary to gnaw the soil so that it seeps water faster.

High air temperature, pinwheat errors

Another reason for the twisting of the leaves can be unsatisfactory temperature conditions. Usually the lower layer of soil is much colder than the surface. The temperature is balanced by airing the greenhouse..

If the leaves on the tomatoes curl in open ground - they are affected by heat. This usually happens when the temperature rises above 35 ° C. Such heat can contribute to accelerated decomposition of useful elements. In this case, the plant can not assimilate them fully, comes the so-called fasting, tops dry and fold, sometimes flies color. To protect the plant from such stress, it must be sprayed with urea (one and a half tablespoons for 10 liters of water). After four days should be treated with potassium permanganate.

Incorrect staving can also cause leaves to curl. This procedure should be carried out at least once or twice a week, without waiting for the undergrowth. If this is done more often, the plant may be stressed due to the large number of remote shoots. Masking is best done on a sunny day so that the wound heals faster. If you have to pinch in cloudy weather, the cuts should be treated with wood ash.

Under the correct pinching removal of healthy stepchain bushes is expected, leaving weak stems and those that look suspicious. To cope with the stress obtained during the procedure, tomatoes will help foliar fertilizer biostimulant.

Incorrect dressing

Painful reactions in tomatoes can be caused by improper feeding, lack or excess of any element.

Excessive rate of zinc can be reflected in the twisting of the edges of the sheet plate and in the purple color of its lower part.

Twisting the seedlings down can indicate a lack of copper, sulfur or boron. If the edges of the leaves curl up - they lack calcium and phosphorus. Another sign of this is the presence of a gray tint. To avoid unpleasant consequences, it is necessary to introduce balanced complex compositions, such as potassium monophosphate.

Diseases and garden pests

It is important to periodically check the plant for the presence of pests - insects. Often on the bottom of the leaf plate you can find aphid, whitefly or red spider mite. These parasites feed on the sap of the plant, drinking vitality from it. The plant is covered with spots, it dries, its leaves curl.

Having found the pests, the plants should be immediately sprayed with preparations such as Alatar, Fufanon or Biotlin. You can use traditional methods in the fight against insects: an infusion of onion gruel with husks, infusion of marigolds, etc.

Diseases that lead to twisting of leaves:

  • bacteriosis. Tomatoes do not grow well, they have very small flowers and short shoots,
  • thin-leaf virus. The disease is very rare. The cause of the occurrence is a prolonged drought in the open field, too bright light in the greenhouse,
  • bacterial cancer. The leaf plate of tomatoes is wrapped, then becomes brown and dries. There are cracks on the stems,
  • tobacco mosaic virus. Blisters appear on the leaf, and a mosaic-like pattern
  • fusarium First, it infects the lower leaflets, gradually moving to the crown. The plant eventually falls off completely. Then begin to wither upper spray shoots. A pinkish, light bloom appears on the fruit,
  • verticillary wilt. The symptoms are the same as in Fusarium, but this disease does not kill the plants.

Unfortunately, there are no ways to cure tomatoes from these diseases. Therefore, the affected plants are removed from the bed and burned. To prevent this, it is necessary to carry out preventive measures:

  • Digging and deep cleaning of the site after harvesting,
  • tillage before planting,
  • choosing the right precursor plant.

Not always twisting the foliage of tomatoes may require treatment. It is necessary to get acquainted with the characteristics of the selected variety before planting. For example, in Cherry, Japanese Crab, Fatima, Honey Drop tomatoes, twisting leaves is considered normal.

Ways to treat tomatoes from curling leaves

It is necessary to find the cause of this phenomenon and try to eliminate it. If the pests are to blame, the plants are treated with special preparations. But before you buy them, you must carefully study the instructions. Some products cannot be used when there are already fruits on the plant, as toxins will accumulate in them.

Do not fertilize tomatoes with manure or slurry that has not had time to pereprepat. This will lead to an excess of ammonia, it can damage the plant..

An excessive amount of nitrogen will cause the plant to form a thick stalk, a large number of stepsons, and the leaves curl up into a straw. To improve the situation, it is necessary to bring wood ash into the ground.

To avoid the consequences of improper feeding, it is better to buy fertilizers, which include all the necessary elements, for example: “Kelkat bor” or “Kelkat zinc”.

It is possible to protect plants from excessive sun by pretending tomatoes. They can throw a spanbond or nurastil. It is also necessary to mulch the soil to cool the bushes in extreme heat. To do this, just lay a layer of grass in 8-10 cm.

The next rule to follow is to water the plants once every two or three days. If the beds are mulched, watering is reduced to once a week. It is important to take into account that the roots of tomatoes are very deep, so there is a lot of water needed: 8-10 liters per fruiting bush. But it is necessary to pour it so that it has time to be absorbed.

At the same time, water overload should be avoided. If the tomatoes are planted in clay soil, the water during heavy rains will accumulate the surface and do not go long inland. The roots will always be in the water. To prevent the disease should be at the time of planting plants in the ground, the hole is filled with loose earth. If this method does not help and the water flooded the surface of the earth, you can dig a groove so that it drains.

Root damage and improper watering

Tomato leaf plates can start rolling up immediately after planting seedlings on a garden bed or in a greenhouse.

This happens due to the fact that the root system was damaged during the transplanting of tomato seedlings.

In such a situation, the seedlings are difficult to help, if the soil is nutritious and normal humidity, it is necessary to leave the plant culture alone, and after about 5 days the leaves should return to normal.

Poor-quality watering is the reason why the foliage twists.

Gardeners most likely know that tomato seedlings:

  • need to water abundantly
  • watering should not be from time to time, intermittently,
  • water regularly required.

Just the failure of the irrigation regime, the timing of the introduction of the liquid, provokes such a negative phenomenon as the twisting of the tomato leaf.

So, for example, tomatoes are especially demanding on moisture immediately after planting bushes on a plot or in a greenhouse. At this time, under each bush it is necessary to pour in half a bucket of water. Then, it is necessary to perform watering a week and a half after the first one; it is necessary to pour 8 liters of liquid for each copy.

Then watering the tomato seedlings must be carried out in a greenhouse construction systematically - 1-2 times in 7 days, it all depends on whether it is hot in it or not, and on the beds in the garden - depending on weather conditions, as necessary.

If there is a shortage of rain, then water weekly, pouring half a bucket of water under the plant, but if the season is rainy, then experts do not recommend additional watering.

In the period of formation of ovaries and the beginning of ripening of the fruit should be watered more abundantly, but again, it is necessary to be guided by weather conditions. With a deficit of moisture, leaflets of tomato seedlings begin to curl inwards, so the plant culture protects itself, minimizing the amount of moisture that evaporates.

If such a phenomenon is noticed, then it is necessary to start watering the garden as soon as possible, but it is not necessary to pour a lot of liquid one-time, it is better to pour 1.5 liters of water at room temperature for 7 days daily until the foliage plates become normal, straight, healthy.

It is important to remember that watering properly perform in the morning or evening. It should not be watered in the midst of the day when it is sunny, hot, and it is very hot, it will harm the tomato seedlings.

For watering it is necessary to apply warm water, which has stood.

Temperature problems - too hot

The violation of temperature during the growth of tomato seedlings in the greenhouse construction or extreme heat during the development on the plot in the garden may also provoke the foliage twisting of this plant culture.

Thus, in a greenhouse construction for tomatoes, conditions should be made with a temperature regime plus 21-23 ° C during the daytime and plus 17-19 ° C at night.

With an increase in temperature more + 30 ° C, seedlings will experience a stressful state.

At the same time, in addition to folding the leaves of tomato seedlings, one can also see the dropping of flowers and ovaries.

In a greenhouse construction, the degree can be reduced by opening doors and air vents, but it is necessary to ventilate carefully, in parts, the formation of drafts should not be allowed.

When the greenhouse design is built in such a way so that there are no air vents, then in order to reduce the temperature, the room will be properly whitened from the inside or covered with white matter.

On the site you can try:

  1. Tomato seedlings priten.
  2. To increase watering tomato in the evening and in the morning.
  3. Additionally add nitroammofoska approximately 20 grams per square plot in the form diluted in water.

In addition, between rows should be made mulch, hay, straw, or cover with non-dark agromaterial.

After 3 days, you can perform another foliar feeding, but now with potassium sulfate.

Oversupply or shortage of fertilizers

Without top dressing, you will not have to expect a high yield of a tomato, professional gardeners know this, but some vegetable growers are afraid to damage plant crops and apply very few fertilizers, while others, trying to collect as many ripe fruits as possible, fertilize too much.

Both provoke the development of such a phenomenon as twisting the foliage of tomatoes.

  1. So, with an excess of Zn in the ground, the edges of the foliage of the tomato will be wrapped. This can be confused with similar symptoms when there is a deficit or excess of moisture, but with an excess in the ground Zn, the bottom of the plant crop will become atypical for a tomato, a bright purple color.
  2. When there is an excess of Mg in the soil, the foliage of the tomato first spins, and then frowns and becomes bright green.
  3. With an excess of nitrogenous substances in the ground, foliage near the plant culture will usually twist at the top of the stem part. To remove the effect of nitrogenous substances, it is necessary to deposit potassium sulfate (10 grams per square) or wood ashes (80 grams under each bush) into the soil in the previously plowed and watered soil.
  4. When micronutrient deficiencies, for example, Ca leaves of a tomato begin to curl upwards, this phenomenon often goes away with the development of top rot on tomatoes. If the excess of Zn and Mg is rather difficult to eliminate, then you can simply cope with a Ca deficit by adding calcium nitrate to the soil .

To do this, 10 liters of water must:

  1. Dilute approximately 22 gr. calcium nitrate.
  2. Pour into the 400 gr. wood ash.
  3. Add and 12 gr. urea.

This means enough for 4 squares of soil under the tomato bushes.

With a deficiency of P, the foliage of the seedlings also curl, but at the same time it will have a gray tint.

In order to more quickly neutralize the flow of the element into the plant culture, it is necessary to add a water solution to the soil, dissolving 90 g. superphosphate in 10 liters of water, this is the normal amount per 4 squares of vegetable garden, occupied by tomato seedlings.

No staving and disease

Masking is the breaking off of shoots from the side of a plant; if it is not done, the tomato seedlings will begin to grow rapidly.

This provokes an abundance of thickened plantations; the plant culture forms a large amount of foliage, which will be curled.

Often it is not easy to cope with this situation, especially if the seedlings are in a very neglected state, therefore stading is necessary at a young age, when the plants tolerate such a procedure without any serious consequences.

Attention! It is important to do everything according to the instructions:

  1. Pysynki is right to break out, not to trim.
  2. This should be done in the morning when the tomato bushes are in turgor.
  3. The length of the shoots should be no more than 50 mm.

Often the leaves of tomato seedlings twist due to various kinds of diseases. Various diseases are developing more actively in thickened plantings, in vegetable gardens, where quality planting care is not carried out.

Using the advice of professionals, you can easily restore the seedlings and collect a rich crop of ripe tomatoes.

We hope now, knowing why the leaves curl at the tomato, you will not allow this phenomenon and get a good harvest!

Causes of leaf curling

The main reasons is a violation of agricultural engineering.

  1. The greenhouse is too hot.
  2. Tomatoes do not have enough moisture.
  3. Lack of batteries.
  4. Excess fertilizer.
  5. Damage to the roots when planting seedlings or subsequent care of tomatoes.
  6. Untimely removal of stepsons. Leaves curl, too, when too many stepchildren are removed at the same time.
  7. Pests are also sometimes the cause of leaf curling.
  8. Features variety.

Depending on the reason, the leaves are twisted either upward in a boat or downward in the form of a chicken's foot.

reason 1. Temperature

In a greenhouse, the temperature is always at least 5-7 ° C higher than outside, even if the doors and vents are open. Therefore, at a temperature in the greenhouse above 27-28 ° and low air circulation, in order to avoid excessive evaporation of moisture, the leaves curl into a tube. At night, when the heat subsides, they expand again.

Very often the leaves curl because of the high temperature.

reason 2. Lack of moisture

With insufficient watering, especially in the heat (and in greenhouses, these factors are inextricably linked), tomatoes also reduce the area of ​​evaporation due to the twisting of the leaves.

It is usually recommended to water the tomatoes once a week. But you need to focus on the situation: if the tomatoes grow on heavy clay soils, then watering is carried out even less often, and if on sandy ones, then every 3-4 days.

  • It is recommended to water tomatoes in greenhouses at a temperature of 16-20 ° C every 7-10 days.
  • At a temperature of 20-25 ° C every 5 days
  • At a temperature of 25-30 ° C every other day
  • Over 30 ° C - daily, but very moderate.

This applies only to greenhouse plants, for open ground such a mode of irrigation is not suitable, because there the tomatoes are additionally watered. When choosing a watering mode, you should always take into account the growing conditions on your site.

If the leaves are twisted in tomatoes, the first thing to do is to ventilate the greenhouse and water the crop.

Immediately abundantly water the plants should not. It is better to carry out watering for several days in small volumes. Especially to observe such a regime is necessary during the fruiting period.

Phosphorus deficiency

The leaves curl up and take on a purple hue from the bottom. Phosphorus is a macronutrient, its tomatoes consume in large quantities.

To compensate for the deficit of phosphorus, the culture is poured with an extract from superphosphate. Для её приготовления 1 стакан удобрения заливают 1 литром кипятка (иначе оно не растворится) и настаивают 12-18 часов, регулярно перемешивая. Готовую вытяжку разводят водой до 10 л и поливают помидоры под корень. Норма внесения 0,5 л под куст.

You can make ash or superphosphate in dry form, but then the effect will have to wait 7-10 days longer.

Tomatoes need to feed phosphorus.

Copper deficiency

The lack of an element is much less common (especially when processing tomatoes with copper-containing preparations for diseases), but its deficiency is not such a rare phenomenon as can be supposed. With a lack of copper, the edges of the leaves curl upward. Yellow blurred spots appear on the leaves, which blacken when severely deficient.

There are many spots and they are randomly located on the entire leaf surface. The leaf looks healthy, but yellow and twisted. To eliminate the problem, tomatoes are sprayed with any copper-containing preparations. You can water the bushes with this solution.

Both spraying and watering not only compensate for the micronutrient deficiency, but also protect tomatoes well from many diseases.

Fertilizing with microelements is required.

Potassium deficiency

The leaves roll up the tube up, forming a brown border around the edges. Tomatoes consume potassium a little less than phosphorus, so it is advisable to make it with each top dressing. With a pronounced shortage of bushes are fed any chlorine-free potash fertilizer.

The best for tomatoes is potassium nitrate, which also contains a small amount of nitrogen. 1 tbsp. l fertilizers are diluted in 10 liters of water. The rate of watering 0.5 liters per bush.

An excellent fertilizer will be a vtyazhka of ash: 100 g of ash poured boiling water and insist day, stirring regularly. Then the solution is filtered and watered tomatoes under the root. Consumption rate of 0.5 liters per bush. If spraying is carried out as an infusion of ash, then 40 g of soap is added to the working solution as an adhesive.

Such bushes require potash supplements.

Nitrogen deficiency

Usually happens on poor soils and at rough violations in agrotechnology of cultivation. With a lack of nitrogen, the leaves become yellowish and shallow. As nitrogen starvation increases, the leaves begin to curl down, turn yellow and dry.

An urgent top dressing with any nitrogenous mineral fertilizer is necessary. If not, then the tomatoes are fed with manure, or infusion of herbs. 0.5 liters of infusion is diluted in 10 liters of water and fed plants. Application rate of 1 l per bush.

Pale leaves of tomatoes due to lack of nitrogen.

Excess nitrogen

The leaves at the top of the bush curl, the rest are very powerful, of normal appearance. To neutralize excess nitrogen stop all organic feeding. Under the bushes make extracts from wood ash or any potash fertilizer that does not contain chlorine.

Excess nitrogen can also be harmful.

Excess zinc

It occurs not so often, but the majority of summer residents do not recognize it and only aggravate the situation. This happens in violation of the frequency and frequency of micronutrient fertilizers. The leaves spin up and hang like a drought.

The main sign of an excess of zinc is the appearance of a violet hue on the lower part of the stem (not higher than 20-30 cm). To remedy the situation, tomatoes are fed with organic matter, and do not contribute trace elements for at least 15-20 days.

Some varieties have a genetically determined purple hue. But then the stem is evenly painted in this color.

Excess zinc is difficult to recognize.

reason 5. Damage to the root system

After planting the seedlings, especially in the greenhouse, the leaves of the tomatoes may twist slightly. This is normal. The root system in seedlings is usually less developed than the above-ground part, so a few days after planting the leaves of the plants are twisted. If after 5-7 days they have not acquired a normal appearance, it is necessary to water the tomatoes with Kornevin or Heteroauxin stimulants.

When planting seedlings in the ground, try not to damage the roots of plants.

Often the roots are damaged by deep loosening of tomatoes. The leaves curl up evenly throughout the bush. Neighboring plants look healthy. To remedy the situation, watering tomatoes with stimulants of root formation (Kornerost, Kornevin) and substances that support plant immunity: Epin-extra, Zircon.

reason 6. Incorrect staving

Untimely removal of stepsons leads to twisting of leaves. Pasynki are removed when their size is no more than 5-7 cm. If they have already outgrown, then it is too painful for the plant, so either you have to leave them or remove them gradually over several days.

Removal of overgrown stepchildren can affect tomato leaves.

If the big stepchildren and tomatoes were removed, they reacted to this by twisting the leaves, then the only thing you can do is to spray the tomatoes with Zircon or Epin-extra.

reason 7. Tomato pests

The hothouse whitefly very often affects tomatoes in greenhouses. This is a small butterfly laying eggs on the underside of leaves. Larvae and adults (butterflies) feed on plant juices. Insects secrete a sweet pad, on which a black fungus settles. The insect reproduces very quickly. It settles first on the youngest and tender leaves on the tops of plants.

Avoid large concentrations of pests on the bushes of tomatoes.

Signs of defeat.

  1. The leaves are deformed and curled, and then turn yellow and fall off.
  2. On the lower side, insect excretions can be detected in the form of sticky honeydew and small white scales - remnants of cocoons.
  3. Lagging bushes in development.
  4. The appearance of black fungus on the stems and leaves of black spots.

What to do

To prevent leaf rolling in hot weather, greenhouses are left open overnight. To reduce the temperature, greenhouse pritenuyut. Inside it should be a constant air circulation. Even in cold weather, it must be aired.

reason 2. Lack of moisture

With insufficient watering, especially in the heat (and in greenhouses, these factors are inextricably linked), tomatoes also reduce the area of ​​evaporation due to the twisting of the leaves.

It is usually recommended to water the tomatoes once a week. But you need to focus on the situation: if the tomatoes grow on heavy clay soils, then watering is carried out even less often, and if on sandy ones, then every 3-4 days.

  • It is recommended to water tomatoes in greenhouses at a temperature of 16-20 ° C every 7-10 days.
  • At a temperature of 20-25 ° C every 5 days
  • At a temperature of 25-30 ° C every other day
  • Over 30 ° C - daily, but very moderate.

This applies only to greenhouse plants, for open ground such a mode of irrigation is not suitable, because there the tomatoes are additionally watered. When choosing a watering mode, you should always take into account the growing conditions on your site.

If the leaves are twisted in tomatoes, the first thing to do is to ventilate the greenhouse and water the crop.

Immediately abundantly water the plants should not. It is better to carry out watering for several days in small volumes. Especially to observe such a regime is necessary during the fruiting period.

reason 3. Battery shortage

If neither irrigation nor airing helped, and the leaves remained twisted, then the problem is more serious than expected: the plants do not have enough nutrients. The leaves curl in different ways, depending on which element is in short supply.

Phosphorus deficiency

The leaves curl up and take on a purple hue from the bottom. Phosphorus is a macronutrient, its tomatoes consume in large quantities.

To compensate for the deficit of phosphorus, the culture is poured with an extract from superphosphate. For its preparation, 1 cup of fertilizer is poured with 1 liter of boiling water (otherwise it will not dissolve) and insist for 12-18 hours, stirring regularly. The finished hood is diluted with water to 10 liters and watered tomatoes under the root. The application rate of 0.5 liters under the bush.

You can make ash or superphosphate in dry form, but then the effect will have to wait 7-10 days longer.

Tomatoes need to feed phosphorus.

Copper deficiency

The lack of an element is much less common (especially when processing tomatoes with copper-containing preparations for diseases), but its deficiency is not such a rare phenomenon as can be supposed. With a lack of copper, the edges of the leaves curl upward. Yellow blurred spots appear on the leaves, which blacken when severely deficient.

There are many spots and they are randomly located on the entire leaf surface. The leaf looks healthy, but yellow and twisted. To eliminate the problem, tomatoes are sprayed with any copper-containing preparations. You can water the bushes with this solution.

Both spraying and watering not only compensate for the micronutrient deficiency, but also protect tomatoes well from many diseases.

Fertilizing with microelements is required.

Potassium deficiency

The leaves roll up the tube up, forming a brown border around the edges. Tomatoes consume potassium a little less than phosphorus, so it is advisable to make it with each top dressing. With a pronounced shortage of bushes are fed any chlorine-free potash fertilizer.

The best for tomatoes is potassium nitrate, which also contains a small amount of nitrogen. 1 tbsp. l fertilizers are diluted in 10 liters of water. The rate of watering 0.5 liters per bush.

An excellent fertilizer will be a vtyazhka of ash: 100 g of ash poured boiling water and insist day, stirring regularly. Then the solution is filtered and watered tomatoes under the root. Consumption rate of 0.5 liters per bush. If spraying is carried out as an infusion of ash, then 40 g of soap is added to the working solution as an adhesive.

Such bushes require potash supplements.

Nitrogen deficiency

Usually happens on poor soils and at rough violations in agrotechnology of cultivation. With a lack of nitrogen, the leaves become yellowish and shallow. As nitrogen starvation increases, the leaves begin to curl down, turn yellow and dry.

An urgent top dressing with any nitrogenous mineral fertilizer is necessary. If not, then the tomatoes are fed with manure, or infusion of herbs. 0.5 liters of infusion is diluted in 10 liters of water and fed plants. Application rate of 1 l per bush.

Pale leaves of tomatoes due to lack of nitrogen.

Calcium deficiency

Leaves spin up. Vertex rot appears on the fruit a little earlier. Feed tomatoes calcium nitrate: 10 g / 10 l of water.

And here you need calcium supplementation.

reason 4. Excess fertilizer

Some summer residents, trying to get the maximum yield, make so much fertilizer for tomatoes (especially organic matter) that plants start to suffer from their surplus, and this, in turn, very quickly leads to diseases.

Excess nitrogen

The leaves at the top of the bush curl, the rest are very powerful, of normal appearance. To neutralize excess nitrogen stop all organic feeding. Under the bushes make extracts from wood ash or any potash fertilizer that does not contain chlorine.

Excess nitrogen can also be harmful.

Excess zinc

It occurs not so often, but the majority of summer residents do not recognize it and only aggravate the situation. This happens in violation of the frequency and frequency of micronutrient fertilizers. The leaves spin up and hang like a drought.

The main sign of an excess of zinc is the appearance of a violet hue on the lower part of the stem (not higher than 20-30 cm). To remedy the situation, tomatoes are fed with organic matter, and do not contribute trace elements for at least 15-20 days.

Some varieties have a genetically determined purple hue. But then the stem is evenly painted in this color.

Excess zinc is difficult to recognize.

reason 5. Damage to the root system

After planting the seedlings, especially in the greenhouse, the leaves of the tomatoes may twist slightly. This is normal. The root system in seedlings is usually less developed than the above-ground part, so a few days after planting the leaves of the plants are twisted. If after 5-7 days they have not acquired a normal appearance, it is necessary to water the tomatoes with Kornevin or Heteroauxin stimulants.

When planting seedlings in the ground, try not to damage the roots of plants.

Often the roots are damaged by deep loosening of tomatoes. The leaves curl up evenly throughout the bush. Neighboring plants look healthy. To remedy the situation, watering tomatoes with stimulants of root formation (Kornerost, Kornevin) and substances that support plant immunity: Epin-extra, Zircon.

reason 6. Incorrect staving

Untimely removal of stepsons leads to twisting of leaves. Pasynki are removed when their size is no more than 5-7 cm. If they have already outgrown, then it is too painful for the plant, so either you have to leave them or remove them gradually over several days.

Removal of overgrown stepchildren can affect tomato leaves.

If the big stepchildren and tomatoes were removed, they reacted to this by twisting the leaves, then the only thing you can do is to spray the tomatoes with Zircon or Epin-extra.

reason 7. Tomato pests

The hothouse whitefly very often affects tomatoes in greenhouses. This is a small butterfly laying eggs on the underside of leaves. Larvae and adults (butterflies) feed on plant juices. Insects secrete a sweet pad, on which a black fungus settles. The insect reproduces very quickly. It settles first on the youngest and tender leaves on the tops of plants.

Avoid large concentrations of pests on the bushes of tomatoes.

Signs of defeat.

  1. The leaves are deformed and curled, and then turn yellow and fall off.
  2. On the lower side, insect excretions can be detected in the form of sticky honeydew and small white scales - remnants of cocoons.
  3. Lagging bushes in development.
  4. The appearance of black fungus on the stems and leaves of black spots.

What to do

When spreading the whitefly, it is very difficult to fight it. The pest multiplies extremely quickly, and most insecticides do not affect the eggs and older larvae. Therefore, emergency measures should be taken at the first detection of a pest.

When shaking bushes infected with whitefly, butterflies take off and are easy to spot.

  1. For catching butterflies use glue traps, which are placed on the tops of the bushes.
  2. With a small spread of the pest, Useterm is used. Spraying is carried out on the underside of the leaves. This biological product and tomatoes can be removed 2 days after processing. Spraying is carried out repeatedly with an interval of 3-5 days to destroy the newly emerged individuals, since the preparation does not act on the eggs. With strict adherence to the treatment intervals, the number of the pest can be significantly reduced.
  3. Simultaneously with Fitoverm, tomatoes are sprayed with Fitosporin or Alirin-B for the prevention and elimination of black fungi.
  4. In case of a massive infection of tomatoes with a pest, they remove all the fruits in the phase of technical ripeness, and the bushes are treated with Aktara. Treatments are carried out on the underside of the leaves at least 3-4 times with an interval of 4-7 days. After spraying, tomatoes should not be eaten for 20 days.

The reasons why the leaves are curled, and how to fight

Look closely at the bushes of tomatoes. The leaves are twisted in or out. It is from this need to look for the causes of the problem. They are divided into infectious and non-infectious.

Experience shows that in some varieties of tomatoes the leaves are always slightly curled. If they were always thin, slightly hung down and slightly turned downwards, then this is most likely a feature of the variety. A striking example of this is cherry tomatoes. In this case, of course, there is no cause for excitement.

Tomato bacteriosis infection

The first symptom of an infectious disease is the twisting of all the foliage on the plant upwards. Further, the leaves at the top of the bush become shallow and lose the turgor, the flowers also become small and colorless, and the ovary is not formed from them.

When bacteriosis in tomatoes, not only leaves curl, but flowers also die

The disease can be transmitted with infected seeds. Also, its carriers are:

Remove diseased plants, because bacteriosis treatment is not subject. After harvesting, decontaminate the soil in the garden: spill it with Pharmaiodus according to the instructions on the package and sow with green manure. It can be:

Winter grass cereals, used for sowing in your area, have good grassroot properties.

Lack of moisture

Long-lasting drought is the most common non-bacterial cause of leaf curling. With a lack of moisture, the task of the plant is to reduce the amount of evaporated liquid. To reduce the area of ​​evaporation, the bushes curl leaves.

To solve the problem, water the beds with tomatoes rarely, but plentifully. Enough for 1 bucket of water under each bush 1-2 times in 7 days.

Ensure that the soil in the garden bed is always sufficiently moistened.

Excess moisture

Excessive soil moisture also causes foliage twisting, this time out.

If tomatoes are in the greenhouse, temporarily stop their watering. On open ground, install a film roof over the bed, which will prevent moisture from entering the bushes during rain.

The best option would be prevention. Regularly loosen the soil around the bushes so that it is well missed. Excess moisture is simply absorbed, and the roots breathe easier.

Excessive moisture can also cause leaf problems.

High air temperature

In hot weather, both in the greenhouse and in open space, the temperature reaches 35 ° C. From this leaves are folded along the middle vein. At night, when the temperature drops, they unwind.

In order for the plants to cope with the heat, arrange drafts in the greenhouse for airing for 2-3 hours in the middle of the day. Открытым грядкам поможет толстый слой мульчи из органики и притенение укрывными материалами.

Большое количество азотных удобрений

Закручивание верхних листьев «в кольцо» свидетельствует о том, что в почве слишком много:

  • свежего навоза,
  • травяного настоя,
  • infusion of chicken manure
  • urea.

The leaves at the same time become brittle, and the stem thickens.

Eliminate feedings that may contain nitrogen. To balance the nutrients you can feed the bushes with potassium monophosphate (1 tsp. Per 10 liters of water). This feeding is done once, and only if necessary, repeated after 2 weeks.

Important trace elements and their lack

Tomatoes are in dire need of phosphorus and potassium, especially during fruiting.

  1. With a lack of phosphorus in the soil the leaves are wrapped down, move away from the stem at an acute angle, become dark green with a purple tinge. Purple leaf color - a sign of lack of phosphorus
  2. A lack of potassium causes the leaves to curl up from the edges to the middle, the young leaves curl, and on ripe tomatoes there may be light spots.

In this case, a one-time application of ash into the soil (1 cup per 1 m 2 of beds) under loosening will help. Tomatoes react well to mineral fertilizers - potassium nitrate and superphosphate.

Incorrect staging

The process of removing the leaves often becomes a great stress for the plant, especially if you remove a lot of large shoots at a time. As a result, the plant not only twists the foliage, but also the flowers fall off.

Properly and timely pasynkovanie save you from many problems with tomatoes

To avoid stress to tomatoes, foliar feeding will help, for which biostimulants can be used (Biolan, Stimpo, Regoplant) or complex fertilizers (calcium nitrate, magnesium sulfate, potassium monophosphate, Kemira Lux, Solution, etc.) according to the instructions on the package. But a more effective method is the timely and correctly performed pasynkovanie.

Pest damage

Whiteflies living on the inner side of the leaf plate, red spider mites or aphids suck out sap from the plant, which leads to yellowing of the leaves, and eventually, spots on them and drying out.

The appearance of insect pests on the leaves can lead to the death of the plant.

To get rid of pests, use the following drugs:

There is another good way. First of all, treat the tomatoes with Topaz at the rate of 2 ml per 10 l of water. After a week, apply the two-component copper-containing drug Ordan, taking 25 g of the substance per 5 liters of water.

Violation of temperature

On hot days, when the dry wind blows for a long time, the leaves of the tomatoes curl inward. Twisting, the plant reduces the area from which moisture evaporates. By evening, the twisted leaves take the usual form and during the night get the missing moisture from the dew, adding to the balance. What to do if a long time is hot dry weather and the leaves of tomatoes curl? The best way is to priten the plant, helping its foliage to avoid twisting.

You can throw the following materials on tomatoes during hot hours:

It is not recommended to water the plant in the sun, as the leaves can get burned from water droplets. A good way to combat the described reason for twisting will be mulching the soil on tomato beds. What to do if the plant is not comfortable enough? You can cool the roots with a few centimeters of cut grass.

Moisture Disruption

A common reason why tomato leaves curl is a small amount or excess of moisture. Some gardeners do not treat watering with due attention, hoping that the rain will compensate for the lack of moisture. Others do not water often enough or in small quantities. With a small amount of water moisture penetrates only a few centimeters of soil, not reaching located below the roots.

Watering tomatoes is necessary 1 time in three days, if the beds are not protected by grass, and 1 time in 7 days on mulch beds. Each bush of tomato should have a bucket of water. It is not necessary to pour it all at once, but in portions, so that all the water penetrates to its intended purpose - to the rhizome.

The reason for the leaf curling inside becomes an excess of moisture. In case of excessive moisture, the leaves of the tomatoes are wrapped up. The root system of plants can suffocate in the period of long torrential rains, especially if the tomatoes grow in clay soil, where the water does not go deep into the ground very quickly. If during the landing of plants to fill the holes with loose earth, this adversity can be avoided. For the removal of moisture from the roots can be made grooves.

Insect pests

The causes of leaf curling complements the damage to the leaves of tomatoes with harmful insects (aphids, whitefly) sucking their juices, which leads to the leaves curling at the tomato. Tomatoes leaves straightened, if the time to start rescue from pests. If the leaves turn yellow, they appear stains and damage, you need to spray the leaves with ready-made preparations or use the infusion of onion peel, celandine, wood ash.

The use of chemicals in the appearance of growing fruits is undesirable, because tomatoes tend to accumulate toxic substances.

If the leaves curl on a tomato due to the presence of pests on them, you can use the following infusions:

  1. Infusion of wood ash. 2 tbsp. Pour the ashes into a bucket of water, mix with 100 grams of laundry soap and leave for 24 hours. Then spray the tomatoes.
  2. The leaves will save from aphids decoction of onion peel, 200 grams of which you need to pour a bucket of warm water and insist 12-15 hours.
  3. During the flowering period of celandine, you need to take 4 kg of the plant and insist 2 days in a bucket of water. Such a drug is able to get rid of caterpillars, larvae, aphids.

Culture diseases

The foliage of tomatoes can curl due to the fact that it is adversely affected by bacterial diseases. There are more than 20 types of pathogens of bacteriosis. Bacterial cancer has become widespread, causing wilting of the shoots, yellowing of the foliage around the edge, twisting it. Fruits become stained — first white, then yellowish. The plant dies on average 2 months after infection. During periods of prolonged rain, cancer spreads extremely widely, since humidity above 80% favors its development.

Leaves on a tomato are also curled due to a disease affecting young plants, such as black spot transmitted by seeds. In case of a blotchiness, dark spots appear on the fruit; later it can be seen that many leaves have twisted and dried.

Bacterial cancer and black spot are not the only diseases.The reason is a little less common, but destructive - bacterial spotting (mottling). At low temperatures and high humidity in early spring, planting tomatoes is especially dangerous because of the likelihood of infection with this bacterial disease. In the course of its flow the leaves twist, the flowers dry out and fall down.

Protect plants by the following measures:

  • use of bacterial resistant varieties,
  • timely weed control, the seeds of which can tolerate infection,
  • systematic removal of affected fruit,
  • careful removal from the soil surface before planting seedlings of plant garbage,
  • disinfecting the beds with a solution of potassium permanganate that destroys the bacteria that kill tomatoes.

Bacterial causes of leaf curling are serious, it is difficult to cure the fruits of a tomato. If the solution of potassium permanganate (you can mix it with a solution of urea) does not give a positive result, infected plants will have to be destroyed.

Deficiency or excess fertilizer

Why do tomatoes roll up leaves if all the conditions for favorable growth are met?

  • Tomatoes may lack nutrients.
  • Green color is lost, plant growth is delayed, foliage is folded - these are signs of nitrogen starvation.
  • If the leaves become grayish, become wrinkled, yellowish and brittle, there is a shortage of potassium.
  • With calcium deficiency, the lower leaves turn pale, if there is not enough boron, the stem turns black.
  • Possible lack of magnesium, manganese, copper, depressing effect on tomatoes. Flowers do not form on them, necrosis develops in the leaves.

Having noticed the characteristic features due to the deficiency of nutrients, it is important to provide emergency help to tomatoes and feed them as soon as possible. It is preferable to conduct foliar feeding, which consists in spraying solutions of nutrients. It is important to observe the permissible concentration of the solution. Saltpeter, boric acid, solutions of manganese, zinc, copper sulphate, ash are used for top dressing.

Why do leaves curl on tomatoes, if there is enough feed? Fertilizer oversupply can also lead to leaves curling, seeking to reduce photosynthesis. Chemical fumes can burn the leaves and stems of tomatoes. To reduce the concentration of fertilizers, you need to water the plants abundantly, washing the top layer of soil. You need to make sure that the water does not stagnate at the base of the bushes, otherwise the tomatoes will suffer from an excess of moisture.

Wrong pinching

Tomatoes are very demanding plants and can slow down their growth and deteriorate, even if all these reasons are missing.

The reason may be incorrectly pinching them or pinching them.

The process consists in pruning individual branches and removing stepsons. It is necessary to be careful, because if you cut more than 2 leaves a week, the rest can start to curl, because the mass cutting off an excessive number of branches and leaves upsets the balance between the rhizome and the outer part of the tomato. Too early can also hurt, less than 3 weeks after planting, pinching and pinching plants.

You can only get rid of stepchildren that have reached 7-8 cm, not forgetting to leave a stump of about 1 cm long at the base of the stem. This is a guarantee that at this place the escape will no longer grow. If you systematically remove all stepchildren, you get a bush from 1 stalk.

You can enhance the power of the root system of a tomato by placing its individual shoots in the grooves and burying them there, so that only the tops of them remain above the surface.

Root system damage

During transplantation of seedlings of tomatoes from pots in the garden, it happens that due to carelessness, certain sections of the plant roots are spoiled. Why do tomatoes because of this turn yellow and twist the leaves? While the regeneration of damaged areas of the root occurs, the tomato does not receive adequate nutrition, so the consequences are the same as when starving plants. Over time, the rhizome is restored, the plant survives, and leaf twisting stops.

It is important to know that some varieties of tomatoes have a characteristic feature - their leaves spin not because of diseases or adverse conditions, but are wrapped by nature. Among them are such varieties as Honey drop, Fatima, cherry tomatoes.

reason 8. Features of the variety

In some varieties of tomatoes, leaf curling is a genetic trait. Basically, cherry and small-fruited varieties of tomatoes are prone to this.

There are also such tomatoes.

Usually in this case the lamina is twisted down to form a “chicken foot”. But in some varieties, the leaves can curl upwards. There is no need to do anything in this case, neither top dressing, nor watering, nor airing will help here. This is just a feature of the brand.

Conclusion

If the leaves on the tomatoes are massively curled throughout the greenhouse, then this is either a violation of the temperature regime, or a lack of moisture.

If the leaves curl only on individual bushes, then most likely it is a lack of nutrients. In this case, they twist gradually, first on one plant, then on the second, third, etc.

First of all, they carefully examine these bushes, and then on one of them they make fertilizing with the necessary fertilizers. If the measures applied gave a result, then the rest of the plants are fed. If there is no result, then continue to select the desired fertilizer until a positive response is received. Only after receiving a positive reaction to feeding, all the other tomatoes are fed with the same fertilizer.

Immediately feed all the bushes with twisted leaves is not recommended, otherwise you can do much harm.

If no measures have helped, the plants are healthy, there are no pests on them, they bloom and bear fruit, then it is better to leave them alone. Apparently, this is a feature of this plant, nothing can help it.

Bacteriosis, mosaic and curliness of tomato leaves - treatment and prevention

Bacteriosis (lat. Bacteriosis), mosaic (lat. Mosaic virus), curly leaves of tomatoes (lat. Chino del Tomate Virus): diseases of tomatoes, twisting of the leaves in which - one of the main signs of plant damage.

Bacteriosis is a fungal disease. It provokes sheet curling to the outside. On the upper branches of the plant, leaves and peduncles decrease in size and lose their color. Virus damage can have the same effect on the plant.

Diseases of tomatoes, leaf curling - mosaic photo

The question arises, how to water the tomatoes so that the leaves on the neighboring plants do not curl? Unfortunately, the affected plants can no longer be saved, they are removed from the root and burned. To protect against the spread of infections, neighboring bushes are treated with Avixil and disinfected the soil with Pharmaiodus. Mustard is planted as a green manure in place of diseased plants.

To protect against the spread of viral diseases, tomatoes should be regularly treated with insecticides against pests that carry them.

Temperature and ventilation

The leaves can twist with a sharp decrease or increase in temperature (when the difference between day and night is at least 5 degrees), as well as increased humidity during the night.

When poorly ventilated, tomatoes in the greenhouse of the disease can be affected: twisting the leaves is one of the signs of an incorrectly chosen regimen. At high temperatures, nutrients break up and are poorly absorbed, so it is important to conduct regular ventilation in the greenhouse.

In open ground at temperatures above plus 30 degrees Celsius, the soil must be mulched, and the plants must be protected from the sun by a covering material. After sunset, the leaves can be sprayed with a slightly pink solution of manganese or urea (1.5 tablespoons per 10 liters of water).

Masking

Excessive staving, carried out at a time, can cause the development of a disease of tomatoes: twisting of leaves and falling off of peduncles are the primary signs of stress in a plant. In order to reduce the impact on the bush when pinching, it is fed with biostimulants: Epin, Heteroauxin, Radifarm, or complex granulated fertilizer.

Feed tomatoes after strawing to avoid leaf curling.

Reinforced watering and excessive drought can lead to rotting of the root system and twisting of the leaf plate (the sheet is twisted along the axis in the form of a boat). In case of prolonged precipitation over the beds, a film roof is made, and if it is watered excessively, it is completely stopped.

It is important to constantly monitor the friability and permeability of the soil, so that the moisture leaves faster. Water vegetables should be moderate - no more than once a week.

The main pests of tomatoes: whitefly, aphid, red spider mite - not only carry viral and fungal diseases, but also suck juices. Weakening of a plant can provoke curliness of tomato leaves, treatment in this case will not help any more, therefore it is recommended to protect plants by regularly treating with insecticides.

Phosphorus deficiency

When the leaves darken to black and the plate is twisted inwards, it is worth suspecting a lack of phosphorus. Fertilizing is necessary: ​​1 cup of superphosphate is poured with 5 liters of boiling water, infused for 24 hours, diluted with warm water to a volume of 10 liters. For watering a bush using 0.5 liters of infusion.

Curling leaves of tomatoes with a lack of phosphorus

Potassium deficiency

A shortage of potassium in the ground can cause curliness in the leaves of tomatoes, and treatment can be started when an additional symptom is detected — light spots on ripe tomatoes. It is necessary to make potassium nitrate (1 tbsp. For 10 l bucket), watering at the rate of 0.5 l per 1 plant. As an alternative, you can use a glass of wood ash for 1 bush - is applied to the moistened soil.

Nitrogen overload

If the sheet plate acquires a ring-shaped form when twisting, the plant increases its green mass, and its stem thickens - this indicates an excess of nitrogen. The reason may be the introduction into the soil of a large number of bird droppings or fresh manure. To eliminate the consequences, tomatoes need to pour plenty of water at the rate of up to 10 liters per bush, or pour wood ash.

Twisting the leaves of some varieties of tomatoes is the norm

Cherry, Japanese crab, Fatima, Honey drop - for these varieties is considered normal twisting of leaves in tomatoes, treatment is not required. These are mainly tall varieties, with thin leaf plates with jagged edges that are folded to the outside. In the case of the same behavior of the leaves, the absence of dryness, brittleness and abscission - torsion is considered a variant of normal development.

Twisting Cherry Tomatoes

С появлением новых, устойчивых сортов: Харизма, Вологда, Урал, Аляска, Жар-Птица - все реже поражают томаты болезни, скручивание листьев в основном проявляется по причине переизбытка, или недостатка влаги и удобрений, загущенной посадки, и других нарушениях при выращивании.