What to do if small cucumbers turn yellow. Yellow leaves due to powdery mildew

Even a not very experienced summer resident can grow a good crop of cucumbers. The culture is quite unpretentious and does not require too much attention to itself. However, sometimes the owners of suburban areas still have different kind questions concerning proper care behind these plants. For example, about why the embryos of cucumbers turn yellow. There may be several reasons for this phenomenon.

Low temperature

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

Heat

Very often summer residents are also interested in why the embryos turn yellow. The reason in this case is exactly the opposite. 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 the embryos of cucumbers turn yellow in a greenhouse lies in wrong selection varieties. For a greenhouse, you should take self-pollinating hybrids. After all, bees rarely fly into the greenhouse. In the event that a mistake has already been made, and the “wrong” variety is planted, the problem can be tried to be solved by attracting insects. To do this, saucers with sugar syrup. They need to be spread male flowers cucumbers. In order for the bees to get inside the greenhouse, you should open the transoms and doors more often.

artificial pollination

If you fail to attract a sufficient number of bees, you can try the procedure yourself. You need to do this 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 ones with them. Since cucumber pollen is sticky, this method may even be more effective.

Wrong watering

Why do cucumber buds turn yellow? The answer to this question often lies in non-compliance with the technology of caring for these plants. Bushes need to be watered exclusively 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 women will disappear.

On cold days it should be at lunchtime, on hot days - in the morning and under the root. The ovaries can turn yellow not only from cold water, but also from a lack of moisture. In this case, the reason for the fall of cucumbers is malnutrition.

Micronutrient deficiency

Why do cucumber embryos turn yellow and fall off even when good care? Another reason for this unpleasant phenomenon can be a lack of trace elements. Especially often a similar problem also occurs in greenhouses. Usually summer residents feed plants with nitrogen, potassium and phosphate fertilizers, while forgetting about trace elements such as boron, zinc, copper, manganese, etc. Therefore, to solve the problem of wilting ovaries, you should try to feed the plants complex fertilizer for horticultural crops or wood ash.

Also, the cause of poor development of the embryos can be an excess of nitrogen in the soil. This macronutrient contributes to the development of the green mass of plants: leaves and stems. It can slow down the growth of the ovaries.

Bush formation

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

Of course, it is necessary to pluck already grown greens in time. As long as they remain on the whip, new embryos will not develop.

bacteriosis

This unpleasant disease can also be the reason why cucumber embryos 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 color. Subsequently, the fruits rot.

Treat bacteriosis usually 1% Bordeaux mixture. You can also use some fungicide. For example, Hom. Dilute this drug in an amount of 40 g per 10 liters. Spraying is carried out at the rate of 1 liter per 1 m 2. Fading female and male flowers should also be cut off.

It is possible to prevent bacteriosis infection by warming the seeds before planting at a temperature of 60-70 degrees for 1-2 hours. Can also be etched planting material TMTD drug in the 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 favorable conditions arise for the development of bacterial infections.

Why do cucumber embryos turn yellow on the balcony

Those who don't have their own suburban area, often grow this plant on loggias. Cucumbers are an unpretentious culture, and therefore it feels very good under such conditions and can give good harvests. However, sometimes the problem of yellowing of the ovaries also occurs when grown on a balcony. There may be several reasons for the disappearance of female flowers in this case.

As in a greenhouse, the answer to the question of why the embryos of cucumbers on the loggia turn yellow may be too heat, lack of pollination or lack of trace elements.

Also, this problem can occur, for example, due to a lack of nutrients. Large enough containers should be used (buckets, deep boxes, etc.). The earth in them should be poured with fat garden. It is also a good idea to feed the cucumbers in the early stages of development with a solution of mullein, and in the later stages - with a complex mineral fertilizer for indoor plants.

Bacteriosis can also cause the embryos to fall off, even though there seems to be no source of infection on the loggia. Warm up or disinfect seeds before planting experienced gardeners advice is not in vain. Often the disease lies already in the planting material.

Thus, we have found out why the embryos of cucumbers turn yellow in greenhouses, on a 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 adverse weather conditions.

Pleased me bountiful harvest from May to September. Imagine my chagrin and disappointment when, on my next visit to the greenhouse, instead of an abundance of crisp greens, I found a lot of yellowed and fallen ovaries.

Determined to find out what happened to my green pets, I went through my files of country magazines and strolled through gardening forums. It turned out that behind this symptom of general trouble, a number of serious problems can be hidden, in most cases associated with flaws in the care of greenhouse plants.

Crop rotation is also needed in the greenhouse

The most obvious and easily eliminated reason for dropping ovaries in a cucumber is perennial cultivation at one place. In case of violation of crop rotation, pathogens characteristic of this particular crop accumulate in the greenhouse soil. Plants can no longer successfully resist the onslaught of external aggressors.

But what about those vegetable growers - lovers of cucumbers, who, like me, use this mega-popular crop exclusively for planting? They come to the rescue, that is, the sowing of special plants with phytosanitary properties. Mustard heals and cleans the soil in the greenhouse very well. This wonderful green manure grows quickly, is not afraid of light autumn frosts and saturates the soil with excellent easily digestible organic matter.

Poor soil = poor harvest

When growing cucumbers in one place for many years in a row, the soil is depleted one-sidedly, the same useful elements. For a full restoration of fertility, it is no longer possible to do just by adding or. If the word “mineral water” already makes you frown with displeasure, then I recommend limiting yourself to the usual autumn dressing of greenhouse soil.

I, in turn, advise not to completely abandon, but to bring them under green manure. Just as grass, passing through the digestive tract of a cow, turns into delicious milk, so the chemical macro- and microelements, being absorbed by green manure, will go back into the soil in an ideal form for absorption by plants.

Cucumbers love stability

Homeland cucumbers are humid and warm subtropics, which are not characterized by sudden changes in weather conditions. The same stable environment must be strived to create in the greenhouse. Unfortunately, due to employment or other life circumstances, the summer resident is not always able to provide greenhouse residents timely watering, loosening and ventilation.

Especially cucumbers do not like interruptions in the flow of moisture in the fruiting phase. A large number of green mass requires a lot of water, which the surface root system cucumber collects from a shallow depth. Therefore, plants react to insufficient watering with massive yellowing and dropping of ovaries.

Cucumbers love stability

By the way, greenhouse cucumbers require more frequent (up to 5 times a week) and thorough soil moistening than ground cucumbers. This is due to the increased air temperature in the greenhouse. In cool weather, it is better to organize watering in the morning, in sunny days this work is postponed to the evening. A light refreshing sprinkling will help the plants relieve stress from the summer heat.

A prolonged cold snap, when the temperature drops below + 10 ... + 14 ° С, is even more harmful for heat-loving cucumbers, since in this case their roots completely stop pumping nutrients out of the soil. Because of this, already started fruits grow slowly, become ugly, and only blossoming flowers begin to wither and fall off. To make it easier for plants to survive difficult times for them, use foliar top dressing(spraying) solutions of complex mineral fertilizers with trace elements.

... and do not like cramped quarters

Sometimes even with the most ideal conditions ovaries on greenhouse cucumbers fade and crumble. In such cases, it is necessary, first of all, to figure out if the plants are crowded in the garden. If the planting is too tight, insolation is violated, and cucumbers suffer from poor lighting.

Cucumbers do not like tightness

In this case, dropping flowers and wilting ovaries is a simple response to such "Spartan" growing conditions. In addition, a dense planting is a direct invitation to the cucumber garden for various fungal diseases that spread rapidly in the damp, stagnant greenhouse air.

Incredible, but true: some modern cucumber hybrids can simultaneously form up to 150 greens on one bush! Naturally, no fertilizer and watering can give the plant enough strength to feed such a colossal crop. Therefore, on such prolific specimens, it is better to remove extra flowers in time, leaving 20-25 ovaries on each individual bush.

Don't Forget Micronutrients

Another reason that provokes the discharge of ovaries in greenhouse cucumbers- Unbalanced diet. Often, a summer resident is overly fond of some one species, completely forgetting that plants need not only phosphorus, potassium and nitrogen, but also a full range of trace elements.

Cucumbers need trace elements

But cucumbers need them in very meager doses: to make up for the deficit, it is enough to add to greenhouse soil microfertilizer containing molybdenum, boron, copper, zinc, manganese. Again, sharp opponents of all kinds of "chemistry" can achieve the same fertilizing effect if they fill the soil in the greenhouse with wood ash annually (at a rate of 250-300 g per 1 m²).

Check pollination quality

Of course, growing cucumbers in a greenhouse involves planting only parthenocarpic(self-pollinated) varieties and hybrids. However, even in this case, plants can throw off the ovaries from poor fertilization. Most often this happens due to stagnation of air in the greenhouse (poor ventilation) and if the planting is too tight. Both factors can work at the same time.

What can be done to improve the quality, if you still decide to plant your favorite varieties of bee-pollinated cucumbers in the greenhouse?

• open wide doors and windows in the morning (from 6 to 10), so that bees and other pollinating insects have free access to flowers. To lure these little helpers into the greenhouse, place bowls with sugar yeast syrup. It is prepared very simply: two parts of sugar are dissolved in one part of water, 5% yeast is added to the mixture and brought to a boil. It is advisable to refresh the treat every other day. And to give the sweet mass a cucumber flavor, freshly picked male cucumber flowers are lowered into it so that insects can crawl over them and not get stuck in the syrup.
• Hand pollinate the ovaries. This method is suitable for small greenhouses and for especially hardworking gardeners.

Bacteriosis is to blame

The development of bacteriosis occurs with excessive air humidity in the greenhouse in combination with a thickened planting. This insidious disease causes drooping and yellowing cucumber ovaries leading to a sharp decrease in yield.

You should start sounding the alarm if you find small shapeless spots on the cucumber leaves - this is a signal of an incipient bacteriosis. In wet weather, droplets of a cloudy liquid (colonies of bacteria) appear on them. Drying up, the affected areas become thinner and crumble. As a result, the leaves of plants turn out to be mottled with small holes, and the flowers begin to wither and crumble.

cucumber bacteriosis. Photo from atmagro.ru

Most often, bacteriosis manifests itself in damp, cool summers. Having found the first signs of the disease, the affected flowers are carefully removed, and the wounds that appear in their place are wiped with a cotton pad moistened with a pale pink solution of potassium permanganate.

To prevent this and other types of rot, plants in a greenhouse are recommended to be regularly sprayed with a 1% solution or a 0.4% solution of copper oxychloride suspension.

Thus, following the rules for caring for greenhouse cucumbers, you are unlikely to encounter yellowing and falling ovaries on plants. And in a cold and rainy summer, it is better to prevent such problems - preventive spraying and more frequent and thorough ventilation of the greenhouse will help.

Why is this happening?

There are many videos on the topic of the greenhouse and what to do. Every novice gardener needs to know what can contribute to plant disease and how to deal with it.

Improper pollination of the plant

One must always remember that cucumbers will grow well if they receive intensive pollination. Insects are needed to carry pollen, and greenhouses are enclosed spaces. That is, it will not be easy for bees and other insects to get there. And without them, the plant will not receive proper pollination.

It is necessary to regularly ventilate the greenhouse so that the bees can make their way inside. In greenhouses, they cannot survive, and without pollination, cucumbers may turn yellow. Those ovaries that appear on pollinated fruits are able to develop rapidly.

Advice

This situation can be solved various methods. Firstly, it is advised to ventilate the greenhouse daily during the daytime for insect access. Secondly, only self-pollinated varieties can be used for growing in greenhouses. Thirdly, you need to pollinate the ovaries yourself. All this will lead to a good harvest.

Temperature

It is important to remember that cucumbers are heat-loving plants. But in some areas there is a risk of bushes dying due to the last frost. They usually arrive in May. From such actions, the plant may turn yellow and stop developing.

Advice

Freezing is easy to deal with. It is enough just to cover the cucumbers with a film. The temperature should not be below 14 degrees. The norm is 25 degrees.

Insufficient intake of minerals

The reason for this is the lack of useful components in the soil. In order for the fruits to be formed correctly, it is necessary to saturate the earth with potassium. With a lack of this element, cucumbers may turn yellow. Why do the ovaries turn yellow and what to do? Below is the answer to this question with a photo. Nitrogen is required for proper fruit development. Without it, cucumbers will also not grow.

Advice

Now, knowing the problem, you need to understand how to deal with it. For the proper development of cucumbers, it is necessary to deal with soil fertility. The plant needs to be fed regularly. With yellowing of the ovaries, it helps a lot tree resin. Many people prefer to feed the bushes with urea. But most effective tool is a special plant growth activator, which is often recommended by our readers.

Inexperienced gardeners notice the problem too late. In this case, fertilizers must be carried out on an emergency basis. To do this, you can prepare a feeding solution. You need to combine 10 liters of water and a large spoonful of urea. Here you can add resin and mix everything. This tool can be sprayed on the leaves of the bushes. But why, even with such care, the ovaries of cucumbers in the greenhouse turn yellow and what to do about it? And because when spraying, the bushes lose moisture even faster. It is better to do this treatment of the plant in the morning and evening hours, when the sun is not able to act on the ovaries. After a few days, the yellowing problem will disappear.

Wrong watering

In greenhouses, it is necessary to regularly maintain a high level of watering. If done incorrectly, the plants will die. Watering is an important factor in the appearance of yellow leaves. The temperature in greenhouses is very high, so cucumbers need to be watered about 5 times within 7 days. Watering should be done in the morning and evening when there is no sun. After all, during the day the sun is able to evaporate moisture from cucumbers, which will lead to their yellowing.

Ovations more than expected

It may turn out that more than 25 ovaries will appear on one plant. This can also cause them to turn yellow. It is important to remember that extra shoots must be removed in time. Indeed, with an increase in the number of ovaries, the consumption of useful components increases. But why do cucumber embryos turn yellow in a greenhouse and what to do? The fruits turn yellow, as they do not receive required amount nutrients for proper development. Something needs to be done with yellowed ovaries, as they will waste nutrients.

Advice

In this case, you will have to do stepchildren. That is, some of the sprouts can simply be transplanted. Or you just need to remove the extra ovaries. This will help you grow healthy fruits.

Various diseases

Why do cucumber ovaries turn yellow in a greenhouse and what to do? The reason for this may be the bacteriosis of the plant. It also appears for many reasons. The ovaries may turn yellow due to dense planting. Cucumbers are recommended to be planted at a certain distance from each other. Plant bacteriosis can manifest itself due to high humidity. You can prevent this situation if you regularly ventilate greenhouses.

The plant may turn yellow due to fungal infection. The most common disease is powdery mildew. Appears on leaves white coating. Gradually they fade. This disease develops due to watering cold water or when the air temperature is low. At the first symptoms of the disease, the plant must be sprayed with a solution of mullein. It is also necessary to treat the soil every year with potassium permanganate.

Sometimes, instead of forming long-awaited cucumbers, the ovaries on cucumbers do not develop, but dry up and fall off. Let's try to figure out why the ovaries of cucumbers turn yellow and what to do in this case, because this problem is familiar to many gardeners.

Yellowing of the ovary of cucumbers due to violation of planting dates

Since the plant is thermophilic, they are planted on the ridges when average daily temperature soil is 10-12 degrees. Cucumbers are grown by seedlings or by sowing seeds directly into the ground. In this case, they must be treated with a solution of potassium permanganate. Plants will be less susceptible to disease. Seedlings are ready for planting at the age of 25-30 days and with 5-6 true leaves per stem.

Poor quality seeds. The main reason why cucumbers grow poorly and fruits slowly appear lies in poor-quality seeds or their improper preparation for sowing. Many gardeners neglect the requirement for proper preparation and simply sow fresh seeds in the ground. As a result, empty flowers and female flowers appear in different time, which leads to problems with the ovary of fruits.

Yellowing of the ovary of cucumbers due to seed quality

The appearance of "female" flowers late, which accordingly leads to later fruiting - may be due to wrong choice seeds. If you sowed fresh seeds, then "male" flowers grow on the plants first, and they are empty flowers, that is, they do not bear fruit. And only then do female flowers appear. If you sow seeds that are already a couple of years old, the "female" flowers appear along with the male ones, or even earlier than the male ones. If you are not aware of the age of the seeds, heat them - this speeds up the appearance of female flowers.

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Yellowing of the ovary of cucumbers due to the characteristics of the variety

Modern productive varieties cucumbers, especially those that do not require pollination, differ large quantity ovaries, they are in each leaf sinus. The plant cannot “feed” such a number of fruits, so it gets rid of part, or all of the ovaries at once. To prevent this from happening, you should remove the extra ovaries, cutting them off before the flowers bloom. On average, 25-30 fruits can form and ripen on one cucumber bush.

Provided that only part of the ovaries turn yellow and dry, and the rest develop normally, nothing needs to be done, the plant itself knows how many fruits it can feed.

Yellowing of the ovary of cucumbers due to poor development

Sometimes on a young and weak plant that has not gained green mass, but with long central and lateral stems, cucumbers begin to tie. The plant cannot provide developing fruits nutrients, therefore, gets rid of the ovaries. Therefore, on young and unformed plants, the lashes must be partially cut off, and the flowers removed.

Yellowing of the ovary of cucumbers due to lack of pollination

If you prefer not only modern varieties, self-pollinating or parthenocarpic, but also traditional ones, the ovaries may dry out due to the lack of pollination. If fertilization of female flowers has not occurred, the ovary will not develop further, it will turn yellow and dry.

Yellowing of the ovary of cucumbers due to non-stepping

It is necessary to remove in time everything that tries to grow from the axils of three to five leaves, and pinch all the stepsons that form above the second leaf. Many gardeners are afraid of pinching, mistakenly believing that this procedure will reduce the yield. However, this must be done without fail and ruthlessly. The stepchildren that will grow from the sinuses are no longer in the main whip, but from the sinuses of the stepchildren, i.e. the so-called second-order shoots, you need to pinch after the first leaf.

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Yellowing of the ovary of cucumbers due to the large number of ovaries

It is also important to monitor the number of ovaries formed on one cucumber lash. Cucumbers develop very quickly, especially in a greenhouse, so if more than 25-30 ovaries appear on one lash, then all the flowers will not be able to form into full-fledged fruits. The plant simply does not have enough strength, as a result of which yellow and rotten ovaries will appear. To prevent this from happening, thin out cucumber lashes in a timely manner.

Yellowing of the ovary of cucumbers due to incorrect temperature conditions

When grown outdoors, cucumbers can react painfully to low temperatures and often do not bear fruit in cold summers. You need to sound the alarm if the air temperature during the day is not higher than +16 ° C, as a result, the plants become weak, and some of the ovaries turn yellow. When the average night temperature drops below + 10-12 ° C, the vegetation stops, and the plant may suffer from various diseases, which provokes not only yellowing, but also drying of the leaves.

cucumbers that grow in greenhouse conditions, may be subject to another adverse factor - elevated temperature. On hot sunny days, the temperature in a heated greenhouse can reach +32 ° C, as a result of which cucumber pollen loses its prolific qualities. The ovaries are not pollinated, may fall off and turn yellow. You can solve the problem by regularly ventilating the greenhouse, which will allow you to adjust the temperature regime, as well as achieve optimal level humidity.

Yellowing of the ovary of cucumbers due to improper irrigation

Cucumbers turn yellow and ovaries fall off? This may be due to wrong mode watering, and the plant simply does not have enough water. Cucumbers in the open field must be watered at least three times a week, and their greenhouse counterparts - at least 4-5 times. Be sure to warm, sun-warmed water, otherwise the ovaries will fall off already 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 to relieve swelling and remove excess salts from the body, eating them is not very pleasant.

Yellowing of the ovary of cucumbers due to a lack of nitrogen

Our cucumbers are terribly eager for nitrogen. Don't feed them bread - give them nitrogen! That is why it is always recommended to plant them on a bed richly seasoned with fresh manure. But firstly, I often don’t have that manure at hand, and secondly, if I’m very zealous with manure, we will get fruits that are tasty, beautiful and with an excess of nitrates.

What to do? ... First, properly fill the bed before planting. But without fanaticism. Nevertheless, it is convenient to use purchased fertilizers (not necessarily mineral ones), for example, the same “Giant universal”. Half a glass under a bush should provide food for your (and our) cucumbers for a month and a half. But this is clearly not enough! Therefore, you can fill the garden bed with a half dose of complex mineral fertilizer with micronutrients.

And of course - top dressing with a weak solution of fertilizers once a week! With this approach, your leaves will not turn yellow from a lack of nitrogen.

Yellowing of the ovary of cucumbers due to disease

Gray rot. Caused by bacteria, under cool conditions. All aerial parts are affected, brown areas appear and dense gray coating on cucumbers. The disease will spread quite quickly. The period from infection to the onset of symptoms is 3-5 days.

To cope with the disease, stop watering, ventilate the greenhouse well, lubricate the affected parts with a pasty mass prepared from Rovral or Euparen mult.

White rot or sclerotinia. A highly infectious dangerous disease that manifests itself in the form of white flakes with black dots on all parts of the plant. Mucus appears on them. soft spots. Above-ground parts wither and die within 3-5 days. Effective drugs on the this moment does not exist. When this disease of cucumbers appears in the greenhouse, it is closed for quarantine with the destruction of all plant residues and soil treatment with steam or its replacement.

Yellowing of the ovary of cucumbers due to pest damage

Melon aphid. It is not a problem to meet melon aphids on cucumbers. Small insects that destroy everything in their path are located from the bottom of the leaf, attack flowers, ovaries and cucumber fruits. During the period of its active activity and reproduction, the leaves fall from the plant, the flowers wither, the yield is sharply reduced due to the weakening of the mother plant. If wet weather is observed during the period of the aphid attack, the plants often cannot be saved at all.

spider mite. The spider mite lives on the underside of the cucumber leaf and feeds on its greens. A small red-green sucking insect is very dangerous for cucumbers, especially in greenhouses. Damaging the plant and braiding the leaves with a small cobweb, the tick destroys entire beds, especially in hot weather when the number of individuals increases significantly.

Cucumbers grown in a greenhouse turn yellow much more often than those planted in the ground. Even if all the rules for planting and growing are followed, the problem cannot be 100% excluded. Why? Certain reasons always lead to yellowing of leaves and ovaries, which we want to talk about further. So, let's see why the cucumbers in the greenhouse turn yellow and do not grow, and what can be done to solve the problem.

Why do cucumbers turn yellow in a greenhouse and do not grow?

There are 6 main causes of yellowing of leaves and ovaries of greenhouse crops

• Freeze or just low temperatures- Cucumbers are sensitive to air temperature. If it is quite warm during the day and cold at night, then the seedlings may suffer - and as a result, the bushes will not only turn yellow, but will generally stop growing. Optimal temperature regime for growing cucumbers - 22-26 degrees Celsius.

• Improper fertilization and, accordingly, a lack of important mineral elements. In this case, the leaves first lighten, then become covered yellow spots, can twist. What to do? Start depositing potash fertilizers, ash, manure, superphosphates. Do not forget that an excess of fertilizer is just as harmful to cucumbers as their lack.
• Not enough moisture - if the plants are not watered enough, they will begin to dry. Excessive watering is also harmful - as a result high level moisture, the roots rot, and in the greenhouse they also begin to actively multiply fungal diseases. What to do? Establish an irrigation regime - it is best to use warm water for cucumbers; during the fruiting period, watering should be more plentiful.

• Too many ovaries - if there are more than 20-25 on one bush, then the plant may begin to wither. What to do? Pinch off excess shoots and ovaries in time.

• Diseases are powdery mildew (common or downy mildew), root rot. What to do? It is optimal to carry out preventive treatment if the bush is infected, its treatment or isolation from other plants will help.

• Damage by insect pests - among them are whiteflies, aphids, spider mites.

To prevent yellowing of cucumbers in the greenhouse, follow the rules for caring for them, water the crops on time and fertilize, remove weeds, and do not forget to cut off the shoots. If the bush is infected, start treating it as soon as possible - otherwise the problem will spread to the entire greenhouse, that is, it will affect other plants.