Why, after active flowering, tomatoes do not tie or tie poorly in the greenhouse: what to do. Why tomatoes do not tie: how to turn the tide Tomato blooms but no ovary

It so happens that with successful flowering, cucumbers do not give an ovary. I planted seedlings, grew them, transplanted them into the soil, watered them, cared for them, but there was no harvest. It's a shame! In this article, we will try to figure out why cucumber ovaries do not grow, and how to avoid empty flowers.

Lack of pollination

What should be done when there is no ovary on cucumbers? The fact is that cucumbers are bee-pollinated crops, which, as you know, require the presence of a pollinator. It is logical that if the bees cannot get to the seedlings, then there will be no ovary. If the temperature environment rises above +35 °C, the pollen is sterilized. As a result, cucumbers flower but fail to pollinate, so waiting to set is a waste of time. In cool weather, insects also do not fly, and pollination does not occur.

Some believe that if the empty flowers are removed, the number of female flowers will increase. But this opinion is erroneous, as this will lead to the fact that pollination conditions will worsen. Do not touch the empty flowers, as they themselves will fall off during the drying process. In greenhouse conditions, it is better to grow self-pollinated varieties. Can be pollinated mechanically: with a brush, first touch the male flowers, and then the female ones.

Strong thickening

In order for cucumbers to properly tie and bear fruit, they should be planted correctly. With a strong thickening, you can be left without a crop. But the situation is fixable: you can simply weed the plants; you should also harvest regularly (some varieties grow very quickly and should be harvested almost every day).

Unsuitable conditions

Cucumbers are tied, but do not grow? The reason may be in violation of growing conditions. Perhaps you need to rethink the lighting mode. If there is little light, then cucumbers have weak stems and elongated fruits. To grow excellent harvest, needed good watering. The main condition is that the water should not be colder than the soil. Most often it is around +25 °C. The best solution is to pour water into barrels to heat it up, or add hot water. It is not recommended to water cucumbers late in the evening.

Keep in mind that excess moisture will not lead to anything good. Here, as in any other matter, balance is important. If the soil has excess moisture, it must be dried. After this simple procedure, some leaves will wither, but most importantly, many female flowers will appear, which is a guarantee that the cucumbers will begin to tie. Just do not overdo it, as the plant may die. Cucumbers are excellently developed root system, so if ground water rise close to the surface, the roots begin to rot and the crop is in jeopardy.

One of important factors obtaining an ovary for cucumbers is the temperature. At high temperatures, gardeners can observe an abundance of barren flowers, but frosts are not the best way so that the cucumbers can start and bear fruit. During the heat, cucumbers need to be watered daily; in cloudy weather, refrain from watering. Great option - drip irrigation which allows you to support required humidity soil.

spoiled seeds

Cucumbers are blooming, but there is no ovary? What if all conditions are met? The reason may be in the seeds. For example, if the seed is stale, then the flowers with the ovary (female) will grow first. And among the fresh seeds there may be only barren flowers ( male flowers). If it is not possible to find out the term of the seeds, then they should be warmed up before planting. This procedure will allow female flowers to appear earlier.

However, there are varieties where flowers with an ovary appear later. Such varieties are considered late. In this case, you just need to wait a bit.

In general, hardening will not interfere with swollen seeds. To do this, they are placed in a cool place for several days, then dried a little and only then they are already sown. Such seeds will begin to grow earlier.

Lack or excess of nutrients

Cucumbers started, but do not grow - what to do? Possibly imbalance nutrients. The opinion that there is not much fertilizer is erroneous. The abundance of nitrogen in the soil will lead to an increase in the number of empty flowers.

If your cucumbers didn’t start at all, what to do in this case? Feed the soil with the missing trace elements and reduce the amount of those that are already in excess.

You can normalize the soil by fertilizing with phosphate fertilizers. Water the seedlings with infusion of tree resin. A cucumber can bloom even if the balance of trace elements in the soil is disturbed, but due to a lack of strength, it will begin to drop flowers. To avoid this, feed flowering plant infusion of mullein every seven days.

What to do

So, what to do if cucumbers do not bloom? Here are some tips:

• create favorable conditions;
• maintain a balance of nutrients in the soil;
• sow high-quality and proven seeds;
• avoid thickening.

It is good to choose seeds for sowing that have been stored for several years. Why? Because prescription improves quality and, accordingly, productivity. Flowers with an ovary appear earlier than usual. To increase the yield, it is also recommended to soak the seed in special solutions.

The reason why cucumbers do not bloom may be an excess of moisture. To prevent this from happening, during flowering, you can refrain from watering on some days. As soon as the ovaries appear, daily watering must be restored.

If there are too many empty flowers, then it is necessary to pinch the top of the main stem.

Cucumber ovaries do not grow - what to do in this case? Check the humidity level in the greenhouse, it should not exceed 90%. You may need to feed the plant - for example, with drugs such as Zircon or Epin.

Video "What to do if there are empty flowers on cucumbers"

From this video you will learn about what actions to take if there are empty flowers on cucumbers.

The southern heat-loving vegetable, which is the tomato, is extremely demanding on the condition of the soil, the amount of watering, changes weather conditions. To get tasty, ripe fruits, it is very important to carry out proper care, water on time and tie up heavy stems.

But even with careful observance of the necessary measures, sometimes plants do not bear fruit. Often, greenhouse owners face this problem. For some reason, tomatoes throw out color, but fruit set does not occur.

What to do in this situation and how can you influence the number of ovaries?

Main reasons

Why are tomatoes grown in greenhouses in the photo often not tied? There can be many reasons for this. However, there are several factors that significantly affect the condition of plants and the level of fruiting.

Growing tomatoes, every gardener knows that this crop does not tolerate excessively high or low temperatures. If it is too hot or cold in a polycarbonate greenhouse, the tomatoes will not only not bear fruit, but may die altogether.

For natural growth and pollination, the temperature regime should be at the level of 22-24 degrees. It is very important to know that watering should not be carried out cold water. Because from cold irrigation, tomatoes stop growing and pollen does not ripen.

With excessive heat from +35 and above, pollen loses all its properties and becomes sterile. One of the reasons why tomatoes do not tie can be the level of humidity in the soil and air. By nature, these plants love moisture.

But at the same time, they can easily endure drought. The question is at what stage of development there is a supersaturation or lack of moisture. During the period of intensive growth of the stems, an insufficient level of moisture will lead to the death of the plant.

The fact that tomatoes require immediate watering is evidenced by drooping, twisted leaves and cracked soil around the seedlings. With excessive air humidity, plants suffer from fungal diseases. Moreover, tomatoes in such conditions are not tied up, since pollen does not have the opportunity to get enough sleep from the boxes. One of common problems The problem faced by the owners of polycarbonate greenhouses is the lack of natural pollination.

On the open field Pollination of plants occurs with the help of wind and insects. In closed greenhouses, pollination of tomatoes and other crops is carried out artificial methods.

Other possible causes

If the above factors are eliminated or brought back to normal, and the tomatoes are still not tied, there are several more reasons, among which may be the following:

Insufficient daylight. With a strong thickening of plantings, sunlight simply does not reach the stems, as a result of which there is a lack of ovaries.

Excess fertilizer containing nitrogen leads to a change in the structure of the flower, which makes pollination impossible.

With insufficient nutrition of potassium and phosphorus, tomatoes do not tie and die.

Soil depletion, which is often noted in greenhouses where all year round growing one crop.

When plants are affected by diseases, the flowers are shed before they have time to create a fruitful ovary.

Experts note that if tomatoes are affected by fungal diseases, it is recommended to remove the plants from the greenhouse. Since it is almost impossible to cure diseases in an enclosed space. A decrease in the productivity of tomatoes may occur due to treatment with pesticides during the period of fruit set. And also when growing vegetables from seeds collected from a previous crop in the same greenhouse.

What to do?

If the tomato shoots turn yellow and the flowers fall off without forming an ovary, it is necessary to establish the cause and act according to the instructions:

In case of insufficient heat, additional heating of the greenhouse should be considered.

To warm the plants, you can carry out evening watering. warm water.

During the cold season, the greenhouse must be additionally insulated with old blankets, film and other materials that will keep the heat in the room.

As soon as hot days come, the greenhouse does not need to be closed, especially at night. The fact is that a slight draft and coolness will help the pollen ripen faster.

Don't forget about correct formation tomato bush. Uniform distribution of stems leads to stable plant development and high fruiting.

If everyone Taken measures did not lead to positive result, it is recommended to cut off the barren flowers to allow the plants to form new healthy flowers.

Thus, if the tomatoes in the polycarbonate greenhouse are not tied, it is recommended to follow the video instructions. Do not forget that in greenhouse conditions, any plant requires a reverent and attentive attitude. Therefore, it is necessary to carefully monitor the condition of the seedlings and, in case of detection of problems with development and growth, immediately take the necessary measures.

Similar posts

Why do our tomatoes bloom, but do not set fruits? Or else, as they say, why do tomatoes have an empty flower? Setting Tomatoes in warm weather Spring, the sun warms, and the flowers fall off and fall off.

If they receive malnutrition and are stunted, then it is understandable that the plant simply drops the ovary, by its nature realizing that it cannot cope with the “bearing” of the crop. And if everything is in order with food and the bushes are a feast for the eyes, then the main reason is simple.

It's low temperature at night and early morning during flowering. After all, it is at night that pollen ripens, and in the morning it pollinates the pistil of the ovary. For tomatoes optimal temperature growth is from +20 to +25°C.

Already at + 15 ° C, flowering completely stops in tomatoes.(there seems to be a flower, but it is completely unopened), and at + 10 ° C, the growth of the entire bush stops. If your tomatoes are in full bloom, but there is no ovary, then they are cold. And the weather is to blame.

It is almost impossible to deal with this, except by heating the greenhouse, but in the open field this method is also impossible. Therefore, people say that, they say, last year was a tomato one, but not this year, and nothing can be done about it.

You can use preparations like "Ovary", but then the tomato bushes will give inferior fruits that set without pollination and practically do not contain seeds, and they will differ in taste and texture from those that should have been inherent in the variety. In addition, these fruits will take a lot of nutrients from subsequent brushes.

Based on my many years of experience, I suggest not to panic and not rush with bad forecasts for the harvest, because the whole summer is really ahead and warm weather will definitely come. Firstly, (this also applies to open ground and greenhouses) all flowers that have not started must be cut off, and if there is not one fruit that has started in the brush, then cut off the entire brush.

This will help the bush to direct all its development towards the speedy formation of subsequent brushes, in which it will try to increase the number and quality of flowers. Secondly (this is only for greenhouses) try to give at least some kind of heating that can maintain the temperature in the greenhouse at night above + 15 ° C.

Here the choice is huge. These are electric heaters, and furnace heating and gas boilers.… Who, what has the ability and desire.

There are also certain folk tricks, such as: Watering with warm water late in the evening, in the hope that the damp earth is more warm and will keep warm until morning. Placement of daytime heat accumulators in the greenhouse in the form of various containers with water (from plastic bottles to huge barrels) which at night will return the temperature accumulated during the day to the greenhouse.

Plus additional cover with mats, artificial felts, etc. In practice, these methods have practically no effect, except in cases where the temperature difference is not so great. For example, when +12°C at night, the missing 3°C can be saved by these methods.

In other cases, no. To summarize all of the above: If you do not have the opportunity to warm your tomatoes by artificial methods, then as soon as the night temperatures naturally rise above the +15 ° C mark, the tomatoes will begin to tie and tie themselves.

And the main thing is to preserve the power of the bushes by this good time, and they, in turn, will provide the tying tomatoes with such nutrition that you will not only not lose in the harvest from late spring and early summer cold nights, but even get a higher and better harvest, albeit a little belated. For the formation of ovaries, tomatoes need certain conditions. Natives of southern countries, tomatoes are very demanding on growing conditions. No wonder in the same area in different years The yield of the same variety can vary significantly depending on weather conditions.

You can level them by growing plants in greenhouses and hotbeds, but even in this case it happens that the flowers fall off the tomato or the fruits simply do not set from them. Why this happens and whether it is possible to influence the situation, we will tell in this article.

What do tomatoes lack?

There can be a lot of reasons why tomatoes in a greenhouse do not tie. Some of them are connected precisely with being in protected conditions, that is, with some isolation from the outside world, but there are also objective reasons, independent of the location and actions of the gardener.

Temperature

Tomatoes love warmth. At low air and soil temperatures, they will not only not bear fruit, but also grow, or even die altogether. However, intense heat has a detrimental effect on the growth and formation of fruits.

The ideal temperature for pollination of flowers is 20-25 degrees. So:

• When the air temperature drops below 15 degrees, pollen simply does not ripen. The same happens if tomatoes are watered with cold water (see How to water tomatoes in a greenhouse and maintain normal humidity air). If the cool weather lasts for a long time, there will be no ovaries on the flowers that have already appeared.

Unpollinated flowers dry and fall off

• Even worse is extreme heat. Even a short rise in temperature to 35 degrees or more leads to the fact that the pollen becomes sterile.

Humidity

If the temperature can be easily measured and somehow regulated with your own hands, then with humidity everything is more difficult. Moreover, the humidity of both soil and air is important. So:

• Tomatoes are considered a moisture-loving crop, but they tolerate drought quite easily. However, it all depends on the stage of vegetation. With a lack of watering during the period of seedling growth and flowering, the flowers will crumble without having time to form an ovary.

Note. A sign of a lack of moisture are curling leaves and drooping tops of plants. As well as cracking the soil under the tomatoes. Curling leaves are a sign of lack of moisture.

• Increased air humidity leads not only to the development of fungal diseases. With it, pollen cannot spill out of the anthers, as it sticks together in lumps. And too dry air prevents the germination of pollen on the pestle.

Pollination

The most logical explanation for why there is no ovary on tomatoes in a greenhouse is the lack of pollination. In open ground, flowers are pollinated by insects, this is also facilitated by the wind, due to which the pollen scatters and is transferred from place to place. In closed greenhouses, plants are deprived of this, the conditions for pollination must be created artificially (see How to pollinate tomatoes in a greenhouse and whether it should be done).

Other reasons

The circumstances listed above are most often the cause of the absence of ovaries on tomatoes, but there are others. Some of them can lead to complete or partial loss of the crop. So:

• Lack of sun, resulting from a strong thickening of plantings; Excess nitrogen, leading to a modification of flowers. Occurs mainly as a result of excessive fertilization of plants with manure; Lack of certain nutrients, mainly potassium and phosphorus; Lack of strength in the plant to form ovaries from all flowers, especially if we are talking about growing tomatoes in a greenhouse of large-fruited or multiple-fruited varieties; Diseases - plants affected by them drop flowers;

Many diseases are not treatable, the plants affected by them must be removed from the greenhouse.

• Growing tomatoes from own seeds; Treatment with pesticides, resulting in reduced pollen productivity.

How to fix the situation

If you see that the plants do not feel good in the greenhouse, the flowers fall or do not form ovaries, you first need to establish the reasons why this is happening and try to eliminate them. What to do in each case, the following instructions will tell:

• If a cold snap is expected, it is necessary to think about heating the greenhouse. You can do this with electric heaters or portable stoves-potbelly stoves (see Greenhouse stove: what do experts advise?). If the air temperature outside drops slightly below 15 degrees and only at night, it can be raised a few degrees in the greenhouse by watering the plants with warm water. Day heat accumulators can also be used: painted dark color containers with water or laid out in the aisles plastic bottles also filled with water.

Barrels with water heated during the day will give off heat at night

• At night, the greenhouse should be covered with a film, old blankets, other canvases that prevent heat from escaping.

Advice. Avoid planting seedlings in unheated greenhouses too early when there is still a threat of a return frost. Or grow tomatoes resistant to low temperatures varieties (Sentyabrina, Dobrodeya, Khalif, etc.).

• Do not water plants with cold water from a well or water supply. It must be collected in advance in barrels or other containers for settling and warming up. When hot weather sets in, ventilate the greenhouse more often, leave it open at night - pollen ripens at night. tomatoes put all their strength into the development of new flowers and ovaries.

Terry flowers as in the photo also need to be removed - they give small and ugly fruits

• To ensure the access of the sun and air to all parts of the plant, it is necessary to properly form a bush. How to do this is shown in detail in the video. The formation consists in pinching (see Pinching tomatoes in a greenhouse, why is this necessary?), topping, tying tomatoes to supports. Ventilation of greenhouses is necessary both to maintain optimal air humidity and for pollination. In calm weather, in order for the flowers to be pollinated, it will be necessary to artificially create air movement using a fan. You can just gently shake the stems and brushes so that the pollen scatters. This must be done in the morning.

If there are not many plants, you can transfer pollen with a small brush or brush

• Do not grow tomatoes from your own seeds.

For reference. Many hybrids are not able to bear fruit when re-grown. Look carefully at the package with seeds - hybrids are indicated by the F1 sign.

• Do not overdo it with nitrogen fertilizers during the flowering period. Tomatoes should be fed with mullein at the initial stage of the growing season, before the flowers appear. And to provide plants with potassium and phosphorus, before flowering, fertilize with potassium sulfate and double superphosphate, dissolving 15 g of each fertilizer in a bucket of water. The price of these drugs is low, so there is no point in saving on them, although many replace them with ordinary wood ash.

Output

Knowing why flowers fall in a tomato greenhouse and ovaries do not form, in most cases you can prevent or stop this process, to make sure, plant a few different varieties resistant to both low and high temperatures. Then you will always be with the harvest.

Why tomatoes do not tie, there is no ovary

Many gardeners complain that for some reason fruits do not set on tomatoes. Every season they carry out a whole agro-technical complex for the care of their plants. Why tomatoes do not tie:

Big heat. At an air temperature of + 30 °, flowering stops, and at + 35 ° - the pollen is sterile and not capable of fertilization, the ovaries and flowers fall off.

Excessive humidity can interfere with tomato development. Humidity should be no more than 70%. Plants will bloom, anthers will not open, and wet pollen cannot get into the pistils.

Low temperature and cold irrigation water. At a temperature of +10°- growth stops, at +12°- no buds are laid, at +15°- buds do not open, flowering stops.

A large waste of nutrients for respiration is caused by high night temperatures in a closed greenhouse. Plants are weakened.

In shaded areas, tomatoes grow, but are poorly tied. Therefore, they need to be given good lighting.

Tomatoes may not be tied due to a deficiency of magnesium and phosphorus with an excess of nitrogen.

It may also be the cause of late pinching. It is necessary to remove small stepchildren 3-4 cm long and direct nutrients to bookmark and form brushes.

Weak roots in tomatoes. Ground organs in tomatoes grow faster than the roots. The ratio of vegetative mass to the mass of roots is 18:1, and by August - 16:1. The roots do not have time to feed a huge bush.

This can cause yellowing of the leaves, vertex rot, dropping ovaries. During the period of intensive growth and formation of brushes, tomatoes need regular feeding, watering, pinching, hilling. To stimulate the formation of ovaries, bushes are sprayed with preparations based on gibberlic acid.

At the beginning of flowering of the first 3 brushes. Ovary, Bud, Pollen, Gibbersib, spending 3 liters per 100 m? How to influence the ovary of a tomato? Very high temperatures and lack of humidity can cause a problem with the ovary on tomatoes, the flowers will dry out and fall off.

Water the paths with water - a proven method, just make sure that the roots of the plants have enough air. This method is great for low volume, but you need to be careful when growing in the ground.

At the peak of the heat, it is best to spray the air clean water, the temperature is a little, but it will drop .. Spray the tomatoes with nozzles, but if they are not there, then in last resort you can just use a hose, but with a fine spray over the tops of tomatoes and not for long.

Remember, it is important not to wet the leaf, but to moisten the air. Why is there no ovary on tomatoes? next of possible causes is a deficiency of phosphorus and cobalt. Or a virus carried by cicadas. If the tomatoes turned out to be hybrids, then a recessive one may have entered.

Try special drugs to increase the ovaries, they are sold in special stores. For example, Ecoberin is used for plants in stressful situations. Tomatoes do not tolerate overly fertilized soil, as all growth goes to the tops.

Thanks to warm weather, tomato bushes grow quickly. Bushes are best tied closer to the crown. Water your tomatoes at least once a week.

After watering, it is advisable to loosen the tomatoes so that the moisture in the soil remains as long as possible and no crusts remain on the surface. It is recommended to combine fertilizing with organic or mineral fertilizers along with watering. Ash is well suited for solving problems with ovaries on tomatoes.

It promotes the formation of ovaries on tomatoes, the ripening and growth of fruits. It is enough to sprinkle ashes around the plant or dilute in water and feed with the resulting solution.

You can feed the tomatoes with manure, for this, 2 tbsp is used. tablespoons of manure and diluted in 1 liter of water. Top dressing of tomatoes with water infused with manure should be carried out once a week or two. To feed tomatoes with ashes, one tablespoon of ash per 1 liter of water is enough.

What is needed for the ovary of a tomato? In order for tomatoes to be tied, it is necessary that they grow in good lighting, on open sunny areas and with low-growing seedlings. Plants will be healthy and will set fruit if the above conditions are met.

It only takes a few cold days after hot weather for tomatoes to stop growing and developing.

© medmoon.ru

Why are tomatoes not tied?

We have heard more than once that tomatoes seem to bloom well, but it does not reach the fruit set. Let's try to understand the reasons for such "failures". Tomatoes are a heat-demanding vegetable crop, and we are in a hurry to plant them in open ground.

Often the first, already formed, flowering racemes are found with low, although positive temperatures. But the best temperature for pollination is 20 - 25 degrees Celsius. When it falls below 15 degrees Celsius, pollen maturation is retarded.

And if it rises above 35 degrees Celsius, it becomes sterile and unviable. Plants of certain varieties have a rather short-term increase in temperature so that the pollen dies. Agronomists say Lola and Handsome hybrids easily endure the heat.

And varieties such as Dobrodeya, Kumushka, Sentyabrina and Filya, Feya, Khalif can set fruits even at 14 - 16 ° C. Good soil moisture for tomatoes is 70 - 75%. These figures explain little to the gardener, but anyone can notice signs of trouble (compacted and even cracked soil, drooping leaves and tops of plants).

Drying of the soil during the growing season of plants, even at the stage of seedlings, leads to flying flowers and ovaries. Air humidity is also of great importance. At elevated temperatures, pollen sticks together in lumps or does not wake up at all from the anthers.

With insufficient atmospheric humidity, the germination of pollen on the pistil is also problematic. This problem often starts in poorly ventilated greenhouses. Tomatoes do not pollinate well in calm weather. What can we say about greenhouses!

Therefore, during the flowering of plants in the morning, it is advised to shake off the stems with your hands. And gently touch the flowering brushes so that the pollen scatters. Excess nitrogen entails changes in the flower. The sepals become larger and brighter, and the stamen cone is almost absent.

Nitrogen top dressing is carried out only in the 1st growing season. Feed the tomatoes with mullein infusion (1:6) with the addition of 12-15 g of potassium sulfate and double superphosphate for 1 bucket of infusion. Instead of mineral fertilizers you can add 0.5 liters of ash.

With a shortage of mullein, top dressing is carried out with a solution of complex mineral fertilizers. A lack of phosphorus and potassium slows down the growth of fruits, affects the quality and quantity of seeds. These batteries are especially needed during the formation and growth of fruits. They strive to avoid thickening of plantings in greenhouses and open ground.

Plants should be stepped up and formed in a timely manner. Fruits do not appear in plants, first of all because of seeds grown from “their own” seeds. Plants defeated by diseases throw off flowers and fruits.

But you should be aware that the treatment of plants with pesticides, in turn, causes a significant decrease in pollen fertility. The problem most often begins when growing large-fruited varieties and varieties with a complex brush. In the first case, it is advised to leave 3 - 4 flowers in the brush, in the second - no more than 15 - 20.

Tomatoes are very demanding on the soil, moisture level, quality of watering, top dressing and lighting. If all this is not observed, one may encounter problems of "fatting", lack of ovary, falling off of flowers, spread of diseases, etc. In this article, we will look at the basic rules for caring for tomatoes and figure out why there is no ovary on tomatoes and what needs to be done if tomatoes are not tied in our greenhouse.

Pollination

The first and most logical explanation for the absence of ovaries during normal flower formation is that there is no pollination. Under normal conditions this is carried out by insects, with the help of wind, light rain, etc., but in greenhouses this is not always easy to do.

Pollinated tomato flowers: petals tilted back

Even at the stage of construction and planning of the greenhouse structure, it is necessary to provide for the presence of opening windows. When the budding period begins, they need to be opened, providing access to insects. To attract them, honey plants are sown in the aisle, and pots with blooming flowers can also be taken out into the greenhouse. If the greenhouse has big sizes(for industrial conditions), experts recommend keeping a beehive inside.

Important! If you plant basil or marigolds between tomato bushes, this will not only attract insects, but also improve the taste of the fruit.

It will not be superfluous to ventilate the greenhouse. It is necessary to create a draft by opening the windows located opposite each other. This is best done on days when a light breeze is blowing.

Natural pollination of tomatoes by insects

In a certain period (early spring, winter), natural pollination cannot be achieved, then you need to use the following tips:

• gently shake the flower, from which the pollen wakes up on the pistil;
• turn on the fan, which will create air movement and carry pollen;
• transfer pollen by hand with a brush or cotton swab.

For large greenhouses in which tomatoes are grown for industrial conditions, manual pollination will not work. They are recommended ventilation, ventilation, as well as the creation of a "light" rain. But the last option is the least effective, since a large percentage of the pollen is simply washed away.

Temperature and Humidity

Favorable temperature for the development of tomato fruits is 20-25 °. Tomatoes love warm, moderately humid climates. If the temperature falls below 15°, the pollen will not mature. Therefore, the greenhouse must be well insulated to ensure optimal mode. However, at significant temperatures (above 35°C), the pollen will be sterile. If the greenhouse is very hot, it needs to be ventilated to lower it. You need to constantly monitor the level of heat, because if unfavourable conditions will last even a short period, this will be enough for the pollen to become unsuitable for pollination.

The microclimate of the greenhouse is maintained by desired temperature air and regular ventilation

Humidity is of no small importance. If it is elevated, provoked fungal diseases. In this case, the pollen sticks together in lumps and falls off. Dry air does not allow pollen to germinate on the pestle.

As for soil moisture, it can be slightly elevated, and tomatoes tolerate short periods of drought normally. But if watering is insufficient at the time of flowering of tomatoes, the flowers will dry out and fall off, not giving ovaries. You can determine that the plant does not receive enough water by the leaves: they will curl, and the tops of the bushes will droop. Soil cracking is also possible.

Fertilizer and top dressing

When fertilizing, you must follow all the rules of feeding, since an excess or lack of certain trace elements also contributes to the absence of ovaries. With frequent fertilization with manure, nitrogen accumulates in tomatoes. It contributes to the modification of flowers, because of which the fruits cannot be formed.

Top dressing of tomatoes is carried out several times during the setting and ripening of fruits.

If not use mineral supplements, the plant will lack such important elements for the development of ovaries as phosphorus and potassium. From mineral species it is worth choosing superphosphate or nitroammophoska. The first contains an optimal set of trace elements and is almost universal, and the second is considered one of the best top dressings for today.

The fertilizer produced in this order is read correctly (all proportions are based on a 10 l bucket of water):
1. After planting seedlings:

• after 15 days, you need to feed with nitrophoska (complex fertilizers);
• after 10 days, a mixture of top dressing with a solution of potassium permanganate is introduced;

2. After picking:

• on day 15: 1 tbsp. l. potassium sulfate and superphosphate;
• before disembarking, you can pour 1 tbsp into the holes. l. saltpeter and superphosphate;

3. after disembarkation:

• after a week, pour the bushes with a solution of potassium permanganate;
• submit in two weeks ammonium nitrate(10-20 g);
• once a week to produce foliar top dressing (by leaves). 10 g of superphosphate, 10-15 g of urea, potassium sulfate.

Mineral fertilizers for feeding tomatoes

4. Flowering of the first brushes: 25 g each of mullein and aerofoska;

5. Subsequent feeding: 15 g of mullein (bird droppings), 20 g of potassium sulfate. Such dressings should be no more than 2-3, make every 2 weeks.

Important! Tomatoes don't like too much. organic fertilizers. Mullein can be applied up to 3 times. Urea cannot be poured directly into the hole - only over the leaves.

Possible reasons for the lack of ovaries

If the basic conditions of care listed above are observed, and there is still no ovary on the tomatoes, the reasons may be completely different. For example, diseases. If the plant becomes ill, then you should not expect a qualitative development of the fruit. With some diseases, tomatoes even shed flowers. Treating tomatoes with chemicals can kill both pollen and flowers. Therefore, plants are not recommended to be processed during the flowering period.

Important! If one bush is sick in the greenhouse, it should be removed immediately. Tomatoes are difficult to treat, and the spread of the disease in closed conditions is very fast.

Also, low-quality seeds can serve as a cause, especially if they are collected on their own. BUT hybrid varieties basically impossible to grow from seed. IN best case, they will produce fruits different from their predecessor.

On a plant affected by the disease, even after flowering, fruits will not be tied

The absence of ovaries can provoke such conditions:

• planting density. If the beds are thickened, access to flowers is blocked for both insects and drafts. Between plants it is desirable to leave up to 30-45 cm, based on the characteristics of the variety;
• lack of strength. If the variety is large or multi-fruitful, in greenhouse conditions it may not be able to fully provide all the flowers with nutrients;
• lack of sun. If the greenhouse is covered with a material with low light transmission, there may not be enough light for the development of the plant. If the tomato is in the shade, it simply dies;
• cold water. It is permissible to water only with warm water, under the root;

In order for fruits to start on the bushes, follow the rules for watering tomatoes

• untimely stepchildren. As they grow, every 1-2 weeks, stepchildren must be removed so that the maximum amount of nutrients is directed to the development of the fruit;
• weak root system. A weak root can be recognized by yellowing of the leaves, the development of vertex rot and the discharge of ovaries. Timely top dressing at the time of active growth of the bush and the development of fruits will allow to avoid this.

How to process tomatoes to form an ovary

All the reasons for the slow development of the fetus lie in the absence proper care for tomatoes. It is necessary to maintain the temperature regime, to produce proper watering, provide proper level greenhouse lighting and ventilation. It is also necessary to apply fertilizers in a timely manner and in a certain amount, to properly form bushes, and to pinch.

The process of pinching tomatoes

There are several preparations than to process tomatoes for the development of the ovary. It is recommended to use drugs Bud, Ovary, Gibbersib, Pollen and others based on gibberlic acid. The processing volume is calculated based on 3 liters per 100 sq.m. Spraying should be done at the moment when the first three brushes bloomed. Processing is allowed 3 times, no more. These drugs affect not only the ovaries, but also accelerate the process of fruit ripening, increase yields and form resistance to diseases.

Preparations to improve the setting of tomatoes

How to pollinate tomatoes in a greenhouse so that fruits are tied: video

How to care for tomatoes so that fruits are tied: photo

Despite the fact that the tomato is a southern plant and very demanding on growing conditions, it is hard to imagine a garden without this vegetable. Like many other garden crops, the tomato loves warmth, so it is not surprising that in a hurry to transplant into open ground, we do not see fruits, but only flowering.

Tomatoes do not tie: reasons

The main reasons for poor tying of tomatoes:

• Low temperature, should be 20-25°C.
• Heat. At +30°C, pollination of flowers also does not occur.
• At high humidity air (more than 70%), wet pollen cannot get on the pistils, and the leaves are also affected by macrosporiosis, which adversely affects the fruitfulness of the plant.
• If it is stuffy in the greenhouse, and high temperatures are observed at night, it is difficult for the plant to breathe and most often weakens.
• In dark areas, tomatoes are poorly tied.
• Lack of phosphorus and potassium.
• Untimely stepchildren. It is necessary to cut off small stepchildren in time in order to direct nutrients to the formation of fruits.
• Despite the fact that tomatoes are a self-pollinating crop, help is needed, especially if the plant is planted in a greenhouse. It is worth shaking the bushes regularly.
• Since the aerial part of tomatoes develops better than the roots, the root system weakens by the period of fruit set, as a result, yellowing of the leaves, dropping of flowers and ovaries is observed.
• To avoid such troubles, it is necessary to feed, water and pinch tomatoes during the period of intensive growth and the appearance of the first ovaries.

Tomatoes do not tie: what to do?

In order for the pollination process to occur normally, an air temperature of at least 20-25 ° C is needed. Of course, at the same time, one should not forget about the optimal soil moisture (up to 70%) and the necessary minerals in the soil, in this case, the fruits will appear on time.

If you grow tomatoes in greenhouses, in order to improve the conditions for the plant, you can resort to simple folk tricks:

• Water the tomato in the evening with warm water, this will retain moisture and heat all night
• Additionally cover the greenhouse with felt or mats
• Install daytime heat sources in the greenhouse, such as plastic bottles of warm water, that will warm the ground all night

After such manipulations, there will be no problems with the ovary of the tomato. And the harvest will be to the delight of the whole family.

Tomatoes are one of the main vegetables on our table. No family celebration can be imagined without tomatoes. Salted, fresh, sliced, whole fruits - everyone will say that tomatoes are the best and most beloved vegetable. Even in summer, tomatoes can give you the necessary boost of energy and energy. right amount liquids, in addition, this vegetable is one of the richest in vitamins and trace elements that are necessary human body both for adults and children.

Each vegetable, as well as each variety of one vegetable crop, has its own timing of flowering and ovary formation. But it happens that a plant, for example, a tomato bush, blooms profusely, pleases the gardener with its pretty small flowers, but after that it does not give a single ovary. A logical question arises, why is this so? Basically, the reason for the lack of an ovary in the presence a large number flowers is the lack of proper pollination.

There are different reasons for this situation, let's consider each of them:

• Violation of the air temperature regime in the greenhouse;
• plant nutrition;
• Unsuitable humidity level for tomatoes;
• Various diseases.

Each of these points is important for the ovary and germination of vegetables in the greenhouse. If we consider problems temperature regime, then both at higher and at lower temperatures inside the greenhouse, there are certain problems with the pollination of flowers.

At temperatures above + 29-31 ᵒС, the regime leads to the sterilization of flowers, that is, to the loss of the possibility of fertilization.

As it was found out by scientists on the basis of observations and numerous experiments, even one day with a temperature above the indicated indicators leads to the complete impossibility of the development of the ovary and fruits from the flowers of the plant. Also, problems with the fertilization of flowers can arise in a situation where the air temperature in the greenhouse drops below 15-14 ᵒС. In this case, the plant completely ceases to be capable of growth, and of the fertilization and development of tomatoes.

Why, due to humidity, there is no ovary on tomatoes in the greenhouse

For the fact that tomato bushes do not give an ovary, various problems with caring for plants can be responsible. Consider the indicators of air humidity. Humidity indicators should be taken into account so that there are no problems.

Namely:

1. From the tomato bushes (their growth and development). At high humidity, the plant may begin to rot, and with a low percentage of this indicator, it may dry out due to lack of moisture. With a shortage, the plant becomes drooping, and the leaves begin to curl, curl.
2. From the side of the flowers.
3. From the side of the formation of the ovary.
4. From the side of the formation, development and growth of fruits.

At high humidity values ​​​​or when it rises sharply from optimal to high, the situation leads to the fact that the flowering plant begins to shed flowers and, as a result, the ovary simply cannot form, since it will not be formed from anything. On the other hand, if the air humidity in the greenhouse is low, then the pollen will not be able to get on the pistil, but even the one that could already be in the flower very rarely germinates.

The question arises, what to do when the humidity is either insufficient or excessive? In this case, it is easiest to tightly control the percentage of humidity.

To increase, you can lower the temperature a little within acceptable limits, and shed the floor of the greenhouse. An increase in humidity has one condition - all activities should be done in the first half of the day, otherwise, you can get a greenhouse effect, which will lead to the death of plants.

For what reason does the ovary of a tomato fall in a greenhouse

The ovary is the most important part in the plant, it is from it that any vegetable grows. The ovary of a vegetable crop develops from a flower after it has faded. Sometimes gardeners complain that the tomatoes are tied up, but the new ovary falls off very quickly. But why is this happening?

Causes:

1. Lack of moisture in the soil - at the same time, even the ovary that has not fallen off dries out, which also leads to a decrease in the yield of bushes.
2. Lack of nutrients - the plant does not have enough necessary substances and trace elements in order to form and grow the ovary. Here we can safely say that the tomato bush will also not be able to form a fruit.
3. Too high nitrogen content in fertilizers. This especially affects plants that are at the stage of the beginning of bud formation.

All of these factors can adversely affect the ovary and lead to its fall, which will at least reduce yields, and at most leave you without tomatoes. Plants are tied only under special conditions.

Any violation of which leads to the fact that the tomato bushes themselves bloom, but the ovaries do not form.

As soon as such pathological changes in the growth and development of plants are noticed, one should immediately begin to look for the cause. Perhaps this is all precisely because of problems with air temperature, or maybe because of humidity or something else.

From what there is little ovary on tomatoes in a greenhouse

Often people prefer to grow their own tomatoes than to buy them. This is especially true for residents of small towns, or for citizens who have at their disposal country cottage area. Some manage to grow tomatoes even in their apartment or house. For example, you can arrange a greenhouse right on the balcony. As practice shows, growing tomatoes in a greenhouse or greenhouse often grow much better than in open ground, but this is not always the case. Few ovaries can be for many reasons, the main of which is also poor pollination of flowers or their absence.

All this can happen due to the following factors:

• If you don't water well greenhouse plants. Tomato bushes simply do not have enough moisture to form an ovary.
• Few nutrients in greenhouse soil.
• Lack of ventilation. Ventilation in a greenhouse is one of the necessary conditions. Otherwise, you can expect meager ovaries, and hence a small harvest, even in a greenhouse.

Many will ask the question: what's wrong with airing? In fact, this procedure, simple on the one hand, is of great importance in growing both tomatoes and others. vegetable crops in covered greenhouses or greenhouses. As you know, in the greenhouse there is nowhere to take the wind or insects, so the function of pollination will suffer to an extreme extent. To solve this problem, you can improve the greenhouse with a ventilation system, or simply ventilate it yourself every day using doors and windows.

Why tomatoes are not tied in a greenhouse (video)

Insects such as bees can help with pollination. Perhaps some have seen that gardeners put a beehive in a greenhouse and under no circumstances destroy it. In this case, we can talk about natural symbiosis.