Why do the ovaries of cucumbers turn yellow? After all, this is such a widespread vegetable crop that we know, as it seems, absolutely everything about it. Gardeners may not understand eggplants, grow strawberries or cultivate currant bushes, but each of them will have at least a small bed or greenhouse with cucumbers.

So why does this vegetable throw us different surprises every year: sometimes it dries out, sometimes it becomes crooked and unsightly, sometimes it grows poorly. Here we will talk in detail about why cucumber ovaries turn yellow and how to deal with this phenomenon.

Lots of ovaries

The principle works here: a lot of good is very bad. If cucumber ovaries do not grow, this may be due to the formation of an excessive number of fruits on one vine. The normal number of them on each plant is 25 - 30 pieces. But some varieties, especially hybrids that are prone to this development, manage to form 150 ovaries at once. Of course, the plant cannot support so many fruits, so gardeners observe shedding and rotting of the ovaries, and the formation of crooked, degenerate cucumbers.

Some varieties cope well with this problem on their own (the flowers fall off like barren flowers), while others will need a little help and cut off all the excess. This way, the remaining fruits will receive all the nutrients and begin to grow actively.

Pollination. How to attract insects

One of the most likely reasons why cucumber ovaries do not develop is a lack of pollination. There are several options for solving this problem, and here are the most effective ones:

Make sure that only self-pollinating varieties grow in the garden bed, but this must be provided for at the stage of purchasing seeds;

Along with cucumbers using the forced pollination technique, plant several plants with male flowers from self-pollinating varieties: when small sizes the greenhouse is quite enough for the formation of fruits;

Provide insects with access to flowers: this is especially important when growing cucumbers in a greenhouse;

Pollinate the flowers by hand with a brush.

In addition, to further attract insects, you can spray the plants with a weak sugar solution, as well as special preparations (“Ovary”, “Bud”, etc.) that attract pollinators.

What is missing in the soil if the cucumber ovaries turn yellow and dry out?

Some gardeners believe that there is no need to fertilize cucumbers. They believe that this procedure is harmful, but everyone desired plants will be taken from the ground. However, the soil under cucumbers is depleted very quickly, since they grow quite intensively and take many components from it.

If there is a lack of microelements in the soil, then the cucumbers dry out, the ovaries fall off en masse, and no harvest will be possible. This crop reacts especially sharply to a lack of potassium - the ovaries, in the absence of it in sufficient quantities, turn yellow especially quickly. Cucumbers also need nitrogen and some other substances vitally.

So cucumbers need to be fertilized, but if it comes to shedding of the ovaries, then the situation is critical, and scheduled fertilization will no longer help. In this situation, it is necessary to take emergency measures and carry out foliar feeding: Add 1 tablespoon of urea, three tablespoons of wood ash to a bucket of water and spray the cucumbers with the solution. It is better to do this in the evening, and if everything was done correctly, the plants will return to normal in a couple of days.

Cucumbers dry out, the ovaries turn yellow and crumble: temperature changes may be the cause

Even in a greenhouse it is not always possible to create acceptable conditions for good growth, and about open beds and there is nothing to say. Cucumbers do not tolerate temperature changes well, and they react poorly to both cold (at 8-9°C the plant dies) and heat (at 35-40º ovaries do not form). If cucumber ovaries do not grow, this may be due to a sharp and steady decrease in temperature - at 15°C growth slows down, and at 10°C it stops completely.

Dealing with this problem is difficult, but possible. In case of excessive heat, ventilate the greenhouse more often; when it gets cold, install a heater or cover the bed with bottles of hot water.

Watering mode

Do cucumbers turn yellow and their ovaries fall off? This may be due to an incorrect watering schedule, and the plant simply does not have enough water. Cucumbers in open ground it is necessary to water at least three times a week, and their greenhouse counterparts - at least 4-5 times. Be sure to use warm, sun-warmed water, otherwise the ovaries will fall off from the sharp cold.

Timely provision of water will save you from another problem - the appearance of bitter cucumbers. Despite the fact that they are very useful and help relieve swelling and remove excess salts from the body, eating them is not very pleasant.

Proper agricultural technology

If even with maximum provision comfortable conditions cucumbers turn yellow and the ovaries fall off, then most likely this is due to a violation the right technology cultivation of this crop. There is no need to talk about the need to regularly change the location - any gardener knows this rule well. If cucumbers are planted in the same soil for several years, this will lead to a sharp depletion of the soil, as we already wrote about above. But there are other common mistakes, for example, when they try to place a large number of seedlings in a small area, hoping for a rich harvest. But after the green mass grows, the plants begin to interfere with each other; they lack sun, water and microelements. Typically, the result will be a sharp reduction in yield.

In addition, it is necessary to collect ripened fruits on time, since while they are in the garden, they absorb part of the nutrition and do not allow young ovaries to develop.

The answer to the question of why cucumber ovaries turn yellow sometimes lies on the surface. You just need to take a closer look - perhaps they are sick or are being attacked by pests and molds. For example, bacteriosis often develops due to excess moisture and violation of crop rotation, fungal mold due to dense planting and lack of fresh air.

It is easier not to solve these problems, but to prevent them with the help of prevention: treat the seeds, use crop rotation technology, disinfect the soil, and prevent excessive growth of green mass. In addition, the lashes can be sprayed with a 1% solution of Bordeaux mixture.

You can also often find small saboteurs on the underside of the leaf - spider mites and common aphids. An infusion of onion peels and a solution of wood ash or special preparations - insecticides - will help get rid of these parasites.

In this article, we answered in detail the question why the ovaries of cucumbers turn yellow. This information will help identify the cause this process, as well as find ways to correct the situation and save the harvest.

The dream of any vegetable grower is a bountiful harvest of high-quality fruits. If the embryos of cucumbers grown in a greenhouse turn yellow and fall off, there is clearly no need to talk about record harvests of cucumbers. To the delight of gardeners faced with this problem, agronomists found the answer to the question of why such a failure occurs in the process of fruit formation and gave recommendations on what should be done in this case. We, in turn, suggest that you familiarize yourself with the advice of professionals and consolidate your acquired knowledge using the final video instructions posted at the end of the article.

It can be very unpleasant to look into the greenhouse one morning and find wrinkled, yellowed ovaries on the green cucumber vines. It would seem that you did everything right, and a few days ago the plants looked absolutely healthy, and then suddenly such a misfortune happened to them. Are hopes for a good harvest completely buried or is it still possible to somehow fix it? To understand what to do in this case, you first need to reliably establish the cause of what is happening.

In fact, there may be several such reasons, the most likely of them include:

• violation of the temperature and water regime in the greenhouse - if it is too hot, stuffy, damp and parky, the embryos of the fruit may well turn yellow due to an uncomfortable microclimate; in addition, significant daily fluctuations in indoor temperature and insufficient watering can lead to the same consequences;
• low quality of the substrate - deficiency of microelements, lack of organic matter, or, conversely, an excess of fertilizers can cause curling and yellowing of the embryos;

• overload of cucumber bushes - cucumber hybrids are capable of forming a huge number of ovaries; if there is an overabundance of them, the plants are physiologically unable to provide all the embryos with sufficient nutrition for normal development;
• dense plantings - cucumber bushes growing in crowded conditions are forced to fight for access to light and “food”, so they direct all their efforts to growing stems and gaining leaf mass;
• irregular harvesting - if the cucumber vines have a large number of large, sometimes even overripe fruits, they rightfully draw all the juices from the plants, and the weak “babies” do not have enough nutrition;
• diseases and pests. Root rot, bacteriosis, powdery mildew, spider mite, melon aphid, greenhouse whitefly - all of them harm the health of cucumber bushes and therefore can cause yellowing of the embryos.

How to prevent yellowing of cucumber ovaries

In order to avoid such an undesirable phenomenon, which is the yellowing of cucumber embryos, in the greenhouse you need to:

• equip the greenhouse efficiently forced ventilation or simply ventilate the structure regularly;
• ensure a constant, optimal temperature for cucumbers in the greenhouse structure;
• to intensify self-pollination of parthenocarpic hybrids, create a light draft in the greenhouse in the morning;
• make sure that the number of ovaries simultaneously growing on a cucumber bush does not exceed 25-27 pieces;
• adjust watering of bushes, i.e. do not allow the substrate to become waterlogged or dry out and water the cucumbers with small portions of warm, settled water;

• Do not plant cucumbers for several seasons in a row in the same greenhouse and fertilize the soil under them with potassium-phosphorus complexes strictly according to the instructions.

Ways to fight diseases

In order to prevent possible infection of cucumbers, it is necessary to carefully remove all last year’s plant remains from the greenhouse and around it, and burn them outside the site, and this must be done regardless of whether they were infected or not.

Advice. Before planting seedlings, the greenhouse must be treated with a disinfectant solution, and its wooden parts must be whitened with lime.

Detected yellowed buds or diseased leaves must be disposed of immediately, but if the entire bush is affected, it must be disposed of. If painful symptoms are detected, you need to quickly establish an accurate diagnosis and treat the cucumber bushes with appropriate medications.

Advice. To repel aphids, you can plant mint, garlic, coriander or fennel between cucumber bushes.

Completing all of the listed preventive measures is not a complete guarantee that the ovaries will not turn yellow, but it significantly increases the chances of getting a good harvest of cucumbers.

Why do the ovaries on cucumbers turn yellow: video

Evgeniy Sedov

When your hands grow from the right place, life is more fun :)

Content

It is believed that this is one of the most unpretentious crops that can be grown in a greenhouse, in open ground, and even on your windowsill. You don’t need to pay much attention to cucumbers, but in some situations yellowing of both the plant and the fruits themselves occurs. It is necessary to understand why this happens in order to save the harvest.

Why do cucumber ovaries turn yellow?

The first difficulty that a beginning gardener may encounter is why do the ovaries on cucumbers dry out in a greenhouse or open ground? The cause of this condition is disease or pests, then it will be difficult to save the crop. There are other options for this condition that can be corrected:

1. There is not enough space for the plant. Trying to get a rich harvest, some plant seedlings very densely, but there are not enough nutrients for all. For example, the “Zyatek” variety is recommended to be planted at a distance of 50 cm. This means that if planted more densely, yellowing may occur.
2. Sometimes the ovaries of cucumbers in a greenhouse turn yellow due to improper feeding. In the first stages, fermented manure, which is rich in nitrogen, will be enough for growth. When fruits begin to set, the plant begins to need phosphorus and potassium.
3. Lack of plant formation. Beginning vegetable growers let the growth of cucumbers take its course; too many greens are formed with large leaves that prevent penetration sunlight, and because of this, the ovaries turn yellow and fall off.

Why do cucumber seedlings turn yellow?

Often foliage begins to deteriorate even at the growth stage, which indicates the development of a disease or improper care of seedlings. Here are the main reasons why cucumbers turn yellow:

1. Bay of plants. Moisture is one of the components that is necessary for the active growth of seedlings. When there is an excess of water, the foliage begins to turn yellow. Vegetable growers need to carefully monitor the watering process.
2. Lack of nitrogen. This is an extremely important element for the plant; if it is deficient, the leaves turn yellow and fall off. The problem can be solved with the help of fertilizers.
3. Disease. The disease manifests itself in the form of powdery downy mildew, which leads to damage to the tops; the cucumber embryos turn yellow and fall off. You can cope with this disease by spraying the seedlings special compounds that kill harmful bacteria.

Why do cucumbers turn yellow and fall off?

The main reason for yellowing of fruits is the usual lack of water. This crop generally only requires a certain amount of moisture and heat. You can understand that the problem is in the water if, along with the fruits, the leaves begin to dry out and wither. In open ground, sudden cold snaps and early frosts can cause color changes. Even too cold water can cause a stressful temperature change. If cucumbers grow in open ground, then covering material can save them from frost, and in a greenhouse - a heater.

Cucumber fruits may turn yellow due to a lack of nutrients. It is recommended to alternate different cultures, the cultivation of which takes place on the same soil. You can use phosphorus and potassium mixtures for fertilizer. Be careful when “feeding”, because along with it fungi and viruses can penetrate into the soil, for example “ tobacco mosaic" It is worth remembering that when a cucumber is fully ripe, yellow color is normal. You can no longer eat it, but you can leave it for seeds.

Why do cucumber fruits turn yellow and dry out in open ground?

Many gardeners prefer to grow these fruits outside of a greenhouse, but they often encounter the same problems as in a greenhouse. Here are some of the main reasons why cucumbers turn yellow in open growth conditions:

1. Infection. Diseases of this plant lead to the fact that the fruits turn yellow and are destroyed. root system, for example: peronospora or fusarium. You can cure cucumbers of them with the help of chemical spraying, but you can no longer eat such fruits, because pathogenic bacteria have penetrated inside. Changing crops that are grown on the same land will help to avoid this situation.
2. Lack of water. This was discussed above; the statement is equally true for both plants in the open ground and those growing in a greenhouse.
3. Lack of oxygen. It is important for the root system to receive it in sufficient quantities. The lack of oxygen immediately manifests itself in appearance fruits Weed regularly so that your cucumbers can grow healthy.

Why do cucumbers turn yellow and dry in a greenhouse?

Many vegetable growers grow fruits in a greenhouse, which allows them to harvest their crops longer (sometimes year-round). The rules for caring for the crop are no different from those described above, so the main reasons why cucumbers turn yellow in a greenhouse are also relevant here. They can be roughly divided into two groups:

Violation of cultivation technology:

1. Violation of watering rules: temperature too low, large or small volume of water.
2. Abundant but irregular watering can cause harm.
3. Effect on fruits and plants low temperatures due to frost. The greenhouse must be additionally heated.
4. Lack of nitrogen, phosphorus or potassium in greenhouse soil.
5. Violation of the recommended dosage when using factory-produced fertilizers.

Diseases of cucumbers in a greenhouse:

1. More often than others, the plant is affected by powdery mildew, which first appears in the form of spots on the leaves, then they turn yellow and dry out. The disease is caused by a fungus that interferes with photosynthesis. They fight it using pollination with special preparations.
2. Not less often, yellowing occurs due to the occurrence of Fusarium wilt.
3. Due to a sharp temperature change, the root system may be damaged by rot. With this disease, the plant turns yellow first from below.

Video: why the ovary of cucumbers turns yellow and does not develop

Discuss

Why do cucumbers turn yellow?

Even a not very experienced summer resident can grow a good harvest of cucumbers. This culture is quite unpretentious and does not require too much attention to itself. However, sometimes owners suburban areas However, various questions arise regarding proper care behind these plants. For example, why cucumber embryos turn yellow. There may be several reasons for this phenomenon.

Low temperature

When grown in open ground, this is the most common reason for the ovaries to fall off. Cucumbers are heat-loving plants. The ovaries turn yellow and crumble already at daytime air temperatures below +16 degrees. If at night the air cools to +10-12 degrees, all parts of the plant without exception - stems, leaves, flowers - begin to die. Of course, in middle lane In Russia, such weather in summer is quite rare. Therefore, yellowing of the ovaries due to low temperatures is a phenomenon more typical of Siberia. It is possible that to save the harvest in this climate zone, the cucumbers will have to be covered with film. You can pull it on arcs made of thick wire or plastic pipes.

High temperature

Very often, summer residents are also interested in why the embryos turn yellow. The reason in this case is exactly the opposite. The plants may be too hot. At air temperatures above +32 degrees, pollen in flowers loses its activity. That is, cucumbers simply do not pollinate. The problem in this case can be solved by regular ventilation of the greenhouse.

Sometimes the answer to the question of why cucumber embryos turn yellow in a greenhouse lies in the incorrect selection of the variety. For a greenhouse you should take self-pollinating hybrids. After all, bees rarely fly into a greenhouse. In the event that a mistake has already been made and the “wrong” variety is planted, you can try to solve the problem by attracting insects. To do this, saucers with sugar syrup. They need to be sorted out male flowers cucumbers To ensure that bees can get inside the greenhouse, transoms and doors should be opened more often.

Artificial pollination

If you fail to attract a sufficient number of bees, you can try the procedure yourself. This should be done from 6 to 10 am. It is during this period of time that cucumber pollen is most active.

For pollination you need to prepare a soft brush. It is carried out along the stamens of several male flowers. Next, the pollen is transferred to the female pistils. Soon after this procedure, many ovaries will appear on the lashes. You can also use another method - pick a couple of male flowers and rub the female flowers with them. Since cucumber pollen is sticky, this method may even be more effective.

Improper watering

Why do cucumber embryos turn yellow? The answer to this question often lies in non-compliance with the technology for caring for these plants. Bushes should only be watered warm water. Its temperature should be approximately +25 degrees. If it is lower, only male flowers will begin to develop in the plant. The existing ovaries on female ones will disappear.

On cold days it should be applied at lunchtime, on hot days - in the morning and under the root. Ovaries can turn yellow not only from cold water, but also from lack of moisture. In this case, the cause of cucumbers falling off is insufficient nutrition.

Lack of microelements

Why do cucumber embryos turn yellow and fall off even when good care? Another reason for this unpleasant phenomenon may be a lack of microelements. This problem also occurs especially often in greenhouses. Typically, gardeners feed plants with nitrogen, potassium and phosphorus fertilizers, while forgetting about microelements such as boron, zinc, copper, manganese, etc. Therefore, to solve the problem of wilting ovaries, you should try feeding the plants complex fertilizer For garden crops or wood ash.

Poor development of embryos can also be caused by an excess of nitrogen in the soil. This macronutrient promotes the development of green mass of plants: leaves and stems. It can slow down the growth of ovaries.

Bush formation

The answer to the question of why cucumber embryos turn yellow in open ground and in a greenhouse may also lie in improper pruning of plants. Modern varieties and hybrids can simply produce a huge number of ovaries. As a result, there may not be enough nutrients for everyone. In this case, yellowed ovaries will hang on the plant like a dead weight. This is why it is so important to prune cucumbers. In a greenhouse, one main stem and several shoots are usually left. In open ground, cucumbers are pruned only lightly, and only if the number of ovaries per vine exceeds 20-25 pieces.

Of course, you should pick the already grown greens in time. As long as they remain on the lash, new embryos will not develop.

Bacteriosis

This unpleasant disease can also cause cucumber embryos to turn yellow and fall off. This infection usually affects up to 30% of fetuses. At the same time, weeping sores appear on the ovaries and small cucumbers yellow. Subsequently, the fruits rot.

Bacteriosis is usually treated at 1% Bordeaux mixture. You can also use some kind of fungicide. For example, "Hom". This drug is diluted in an amount of 40 g per 10 liters. Spraying is carried out at the rate of 1 liter per 1 m2. You should also pick off fading male and female flowers.

Infection with bacteriosis can be prevented by warming the seeds at a temperature of 60-70 degrees for 1-2 hours before planting. Can also be etched planting material with TMTD in an amount of 3-4 g per kilogram. In the fall, it is imperative to remove all tops from the beds. It is especially important to carry out this procedure in a greenhouse, where for the development bacterial infections favorable conditions arise.

Why do cucumber embryos turn yellow on the balcony?

Those who don't have their own summer cottage, this plant is often grown on loggias. Cucumbers are an unpretentious crop, and therefore feel very good in such conditions and can produce good harvests. However, sometimes the problem of yellowing of the ovaries also occurs when growing on the balcony. In this case, there may be several reasons for the loss of female flowers.

As in a greenhouse, the answer to the question of why the cucumber embryos on the loggia turn yellow may be too high temperature, lack of pollination or lack of microelements.

This problem can also arise, for example, due to a lack of nutrients. Containers should be large enough (buckets, deep boxes, etc.). It is worth pouring rich garden soil into them. It is also a good idea to feed the cucumbers in the early stages of development with a mullein solution, and in the later stages with a complex solution. mineral fertilizer for indoor plants.

Bacteriosis can also cause the embryos to drop off, even though there seems to be no source of infection on the loggia. Warm or disinfect seeds before planting experienced summer residents It is not in vain that they advise. Often the disease lies precisely in the planting material.

Thus, we have found out why cucumber embryos turn yellow in greenhouses, on the balcony or in open ground. The main reason for this phenomenon is, as you can see, improper care. Also, such a nuisance can occur due to infection of plants and unfavorable weather conditions.