At least once during his practice, every gardener is faced with such a problem as yellowing leaves in cucumbers. In some plants, the lower leaves turn yellow and become stained, in others, only the edge turns yellow, forming a dried border. There are many prerequisites for such a misfortune, as well as ways to deal with it.
Leaves turn yellow for several reasons:
- Lack of lighting, which leads to yellowing and death of the lower leaves. This is normal for lush vegetation in the garden. In this case, it is enough just to cut off the dead parts.
- Not properly organized watering, which is expressed in excess moisture or in its lack. Cucumbers love water, and in warm weather, it is recommended to water the plants abundantly two to three times a week, wetting the soil deeply. If intense heat begins, daily watering should be organized. Otherwise, the roots of the plant crawl out and begin to dry out, which leads to yellowing of the leaves and ovaries. When excessive humidity is established and it rains constantly, the roots and stems rot.
- Damage by fungi - fusarium, pitiosis, bacteriosis and other diseases that manifest themselves as brown spots. The lashes of the plant become lethargic, dry out and fall off, not responding to watering.
- Pests - whitefly, cucumber flies, aphids, spider mite sucking juices from the green part of the bush.
- a lack of nutrients and depleted soil, which leads to a delay in the synthesis of chlorophyll. If cucumbers lack potassium and magnesium, the leaves turn yellow and dry at the edges, iron or manganese deficiency is manifested by the presence of dark green veins on yellowed tops, yellowness on upper leaves indicates a lack of copper.
- Scorching sun. Cucumbers are recommended to be planted in a shady place and watered under the root, into the ground, so that the moisture that gets on the leaves does not cause burns and wilting.
- Cold. The plant does not like frost. To get a crop, it is necessary to take into account the climatic features of the region.
- Lack of pollination. This is especially true for greenhouse plants that do not set up, give out empty flowers and gradually die off.
What to do
Undoubtedly, it is better to prevent than to treat later, so timely prevention is the main method of dealing with yellowed leaves.
Shoots with 3-4 leaves every 10 days should be sprayed with a solution of 1 liter of milk, 30 drops of iodine and 20 g of brown laundry soap for 10 liters of water.
To keep the tops green until the end of the season, you can feed the bushes with a mixture of a loaf soaked in a bucket of water with a small vial of iodine (20 ml). Before spraying, 1 liter of liquid is added to a bucket of water, and the remaining solution is stored in a cool place in tightly closed jars. nylon lids. The procedure should be repeated twice a month.
In early June, cucumbers are watered with a soda solution (1 tablespoon per 10 liters of water), which has a detrimental effect on many plant diseases.
In order to prolong fruiting and revive aging tops, it is recommended to feed the plant with urea, humus and spray it with infusion of hay soaked in water in a ratio of 1: 1.
When you see that it was still not possible to save the plant, and the leaves began to turn yellow, then you can use popular folk recipes.
You can spray cucumbers with a solution of kefir or whey (2 liters per 10 liters of water) with the addition of 150 g of sugar, which will be an excellent prevention of fungal diseases and will help the fruits set up faster.
If the first signs of yellowing are noticeable, the plants should be watered with a weak solution of potassium permanganate.
To get rid of pests, use ordinary onion peel. Usually 0.5 kg of husk is poured into 10 liters of water and brought to a boil, removed from heat, covered and infused for about 12 hours. The resulting infusion is diluted with water 1: 4 and sprinkled abundantly on the leafy part, and then the soil is thoroughly moistened. After such procedures, the tops become green, numerous ovaries are formed. If you feed the soil with such a composition, then it will receive a rich set of vitamins and microelements necessary for productive growth and abundant fruiting throughout the season.
Yellowed leaves will be of great help by spraying with mullein, diluted with water in a ratio of 1:5 or 1:8.
In some cases, you can use biological preparations, safe for humans and animals, for example, Trichodermin, to increase the plant's resistance to pests and pathogenic bacteria.
Video "Processing cucumbers if the leaves turn yellow"
Take advantage of these simple advice if you notice that the foliage of your cucumbers is turning yellow.
It is believed that this is one of the most unpretentious crops that can be grown in a greenhouse, on open field 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 is happening in order to save the crop.
Why do cucumber ovaries turn yellow?
The first difficulty that a novice gardener may encounter is why do the ovaries dry up on cucumbers in a greenhouse or open field? The cause of this condition is a disease or pests, then it will be difficult to save the crop. There are other options for this condition that can be corrected:
- The plant has little space. 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 with a distance of 50 cm. This means that yellowing may occur with a denser planting.
- Sometimes the ovaries of cucumbers in the greenhouse turn yellow due to improper feeding. In the early stages, fermented manure, which is rich in nitrogen, will be enough for growth. When the fruits begin to set, the plant has a need for phosphorus, potassium.
- Lack of plant formation. Beginning vegetable growers let the growth of cucumbers take their course, too much greenery is formed with large leaves that prevent the penetration of sunlight, and because of this, the ovaries turn yellow and fall off.
Why do cucumber shoots turn yellow
Often the foliage begins to deteriorate even at the growth stage, which indicates the development of the disease or improper care for seedlings. Here are the main reasons why cucumbers turn yellow:
- Bay of plants. Moisture is one of the components that is necessary for the active growth of seedlings. With an excess of water, the foliage begins to turn yellow. Vegetable growers need to carefully monitor the watering process.
- Lack of nitrogen. This is an extremely important element for the plant, with a deficiency of which the leaves turn yellow and fall off. You can solve the problem with the help of fertilizers.
- Disease. The disease manifests itself in the form of powdery downy mildew, which leads to damage to the tops, the embryos of cucumbers turn yellow and fall off. You can cope with this ailment by spraying seedlings with special compounds that kill harmful bacteria.
Why cucumbers turn yellow and fall off
The main reason for the yellowing of fruits is common disadvantage water. For this culture, as a rule, only a certain amount of moisture and heat is needed. 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, a sharp cold snap, early frosts can become a factor in discoloration. The cause of a stressful temperature drop can even be too cold water. If cucumbers grow in open ground, then covering material can save from frost, and a heater in a greenhouse.
Cucumber fruits may turn yellow due to a lack of nutrients. It is recommended to alternate different crops grown on the same soil. Phosphorus, potash mixtures can be used for fertilizer. Be careful when "feeding", because fungi, viruses can penetrate the soil with it, for example, "tobacco mosaic". It is worth remembering that when the cucumber is fully ripe yellow is normal. You can no longer eat it, but you can leave it for seeds.
Why cucumber fruits turn yellow and dry out in the open field
Many gardeners choose to grow these fruits outside of a greenhouse, but often face the same problems as in a greenhouse. Here are some of the main reasons why cucumbers turn yellow in open growing conditions:
- Infection. Diseases of this plant lead to the fact that the fruits turn yellow, collapse root system, for example: peronosporosis or fusarium. You can cure cucumbers from 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.
- Lack of water. This was discussed above, the statement is equally true for plants in the open field, and for those that grow in a greenhouse.
- Lack of oxygen. For the root system, its intake in sufficient quantities is important. The lack of oxygen immediately manifests itself in appearance fruits. Weed regularly so that cucumbers can grow healthy.
Why cucumbers turn yellow and dry in a greenhouse
Many vegetable growers grow fruits in a greenhouse, which allows them to harvest longer (sometimes year-round). The rules for caring for a crop are no different from those described above, so the main reasons for which cucumbers turn yellow in a greenhouse are also relevant here. It is conditionally possible to divide them into two groups:
Violation of cultivation technology:
- Violation of watering rules: too low temperature, large or small volume of water.
- Abundant, but irregular watering can harm.
- Impact on fruits and plants low temperatures due to frost. The greenhouse must be additionally heated.
- Lack of nitrogen, phosphorus or potassium in the greenhouse soil.
- Violation of the recommended dosage when using factory-made fertilizers.
Diseases of cucumbers in the greenhouse:
- More often than others, the plant affects powdery mildew, which manifests itself first in the form of spots on the leaves, then they turn yellow, dry out. The disease is caused by a fungus that interferes with photosynthesis. They fight it with the help of pollination with special preparations.
- At least yellowing occurs due to the occurrence of Fusarium wilt.
- Due to a sharp temperature drop, the root system can be damaged by rot. With this disease, the plant turns yellow first from the bottom.
Video: why the ovary of cucumbers turns yellow and does not develop
Yellow leaves appear due to a lack or excess of moisture. In a normal summer, it is recommended to water cucumbers several times a week, and in hot summers - every day, wetting the ground well. The lack of moisture for plants is a disaster, the leaves and ovaries begin to turn yellow. Rainy weather and overflows for cucumbers are also bad: the roots rot, rot forms on the stems, as a result, we again see yellow leaves on the cucumber bed.
Ideally, the soil should be moderately moistened to a depth of 9 - 12 cm. It is necessary to normalize irrigation, if the soil under the cucumbers is too wet, then it is imperative to stop watering and loosen the soil over the entire surface. You can mulch the beds with a layer of mulch that will prevent moisture from evaporating quickly, and will also provide extra warmth to the cucumber roots.
The most common reason for the yellowing of the lower leaves of cucumbers is the lack of light (growing cucumbers under a film). Located higher, the leaf blades shade the lower leaves, they turn yellow and dry out. This is not a cause for concern, but a normal occurrence. In this case, you can simply remove the yellowed and beginning to dry leaves.
Diseases of cucumbers
Very often, cucumbers turn yellow due to fungal diseases. Most often it is fusarium, pitiosis and others fungal diseases are the reason yellow leaves. First, spots appear on the tops, then the leaves are completely covered, curled and dry. If the heat has been replaced by cold rains and lower night temperatures, the appearance of the fungus will not take long.
To protect against pathogenic fungi and bacteria, use biological preparations or fungicides.
after germination in the phase of 3-4 leaves (and then every 10 days), as a preventive measure, spray cucumbers with the composition: 1 liter of milk, 30 drops of iodine and 20 grams of laundry soap per 10 liters of water.
Iodine serves as a powerful antiseptic, and lactose creates the thinnest film on the leaves of cucumbers, due to which pathogens have practically no chance of penetration.
Onion peel helps against pests. Pour a 700-gram jar of onion peel into a saucepan, add 1 liter of water and boil for 5 minutes. Then squeeze the onion peel, filter the broth, add water at the rate of 10 liters of total volume, dilute the working solution in a ratio of 1:5 with water. Leaves are sprayed with this solution from above and below, and the ground is shed.
Feed for cucumbers
The leaves turn yellow due to a lack of micronutrients or macronutrients. Timely top dressing will help to correct this situation (how to feed cucumbers during fruiting).
For the whole summer season it is quite enough for cucumbers to carry out 3-4 top dressings. Everyone chooses the type and form of feeding or their alternation. As a rule, you need to apply top dressing mineral fertilizers combined with organic
- I top dressing - 15 days after planting.
- II top dressing - at the beginning of flowering.
- III top dressing - during mass fruiting.
- IV top dressing - also during the fruiting period; its goal is to prolong the fruiting period of cucumber lashes and make it more abundant.
Temperature regime for cucumbers
Yellowing of the leaves of cucumbers is possible due to hypothermia, everything is simple here: a cold snap is the most severe stress for plants, and they always respond to this stress in the same way - with necrosis. Yellowed areas of cucumber leaves are necrosis.
Cucumber comes from the hot and humid Indian jungle, his love of warmth is "innate". The root system of cucumbers is especially demanding on heat, and low air temperatures (and most importantly, soils) do not allow the roots to work at full strength. The result is yellowing of the leaves.
With loosening the soil and pulling out weeds, you also do not need to be too zealous: instead of loosening, mulching is recommended, and weeds growing near the root system must be carefully removed.
If, nevertheless, the leaves began to turn yellow, you can try to spray and water the cucumbers with a solution of whey (2 liters per 10 liters of water) and 150 grams of sugar, after such treatment, ovaries form again on the cucumbers and they bear fruit.
Yellow spots appear due to sunburn, this is typical primarily for greenhouse cucumbers. On hot days, droplets of condensate fall on the leaves, burn them and we see pale yellow spots on the cucumbers.
In the greenhouse, in order to prevent condensation from accumulating, it is necessary to open the windows, doors for ventilation, thereby reducing air humidity and temperature.
If cucumbers do not grow in a greenhouse, but on the street, there is only one way out - do not water the plants in the heat, it is better to water the plants in the morning and evening hours, try not to get on the leaf blades when watering.
If the leaves of the cucumber began to turn yellow towards the end of the season, then you should not worry, most likely this is the natural aging of the plant. Cucumber leaves coarsen, photosynthesis stops, yellowing occurs and they die. In this case, the most the best way- remove the cucumber leaf blades so that they do not start to rot.
To prevent cucumber leaves from turning yellow The best treatment everything in the world is prevention, and the yellowing of cucumber leaves is no exception. It is easier to prevent this from happening in your garden than to treat it later.
Cucumbers can be grown upright and vertically, on trellises. The second method has been successfully used in greenhouses for a long time, it saves usable areas and reduces the risk of infection of plants with infectious diseases.
In order for cucumber bushes to grow well and bear fruit, they need:
- heat;
- high humidity;
- nutrients.
When arranging a greenhouse, it is better to orient it from east to west, so the plants inside will be provided with the maximum amount of light. WITH north side the beds should be closed from the cold wind.
Watering cucumbers should be regular, however, you need to make sure that the cucumbers do not stand with their roots in the swamp.
Cucumbers respond very well to foliar and basal feeding. Fertilizers are applied at least once every 10-14 days.
This garden crop does not tolerate too high summer temperatures in the southern regions, so you should immediately provide for the possibility of creating a temporary shelter for vegetables. best material for this purpose, vegetable growers consider a thick mesh, it allows you to scatter direct sunlight, but at the same time does not create conditions for overheating cucumber bushes.
Reasons why cucumber leaves may turn yellow
The leaves on the cucumbers, yesterday still bright green, suddenly turned yellow. How dangerous is this for vegetables and what measures can be taken to save the crop?
Leaf yellowness
Vegetable growers name several main causes of yellowing leaves:
- Lack of light. Cucumber thickets are so dense that the lower leaves of the lashes lying on the ground practically do not receive the right amount sunlight. This reason is quite natural and it is not necessary to deal with it.
- High or low humidity. Cucumbers love water, but you can’t create a swamp on the beds either. high humidity will result in rotting of the root system. And the lack of moisture will cause the root system to dry out. As soon as the roots become short of water, they will begin to climb to the surface of the soil, after which the leaves of the plant will immediately begin to turn yellow and the ovaries will fall off.
- Infection of plants with fungal diseases. If drought and heat are replaced by cold snaps and prolonged rains, the risk of infection of cucumbers with fungi increases dramatically.
- Plant damage by pests. In this case, the yellowing of the sheet occurs immediately after the appearance of small whitish spots on it. This is a spider mite and whitefly larvae suck juices from cucumbers.
- Nutrient deficiencies. Lack of iron, copper, potassium, manganese, magnesium can cause wilting and yellowing of the leaves. If you do not take action, the whole plant will dry out.
- Night frosts. After a sharp cold snap, the edges of the leaves freeze, turn yellow, curl and dry.
- Mechanical damage to the root system. Such a problem can arise if a support for a cucumber lash is dug into the ground next to the central stem. To prevent this from happening, support posts set before planting seedlings in the ground.
- Burnout in direct sunlight.
- Natural aging of the plant. Occurs towards the end of the fruiting period, the cucumber lash begins to wither and dry.
How can I treat cucumber leaves from yellowing
If cucumbers are affected by an infectious disease, they must be sprayed with any biologically active preparation (for example, trichodermin). You can buy such a tool in a specialized store.
water solution
To save the plants that begin to get sick, an aqueous solution of iodine (1: 2) lubricates the stem from the root to the ovaries. Spray the entire bush, along with flowers and ovaries, with a mixture of brilliant green and iodine. To do this, 10-15 ml of antiseptics are dissolved in one bucket of water.
Advice. A soda solution will help well against rottenness and fungi. This tool must be treated with the whole plant as a whole. To prepare it, dilute 60 g of baking soda in 10 liters of water.
In addition to biological and chemicals you can apply folk methods aimed at improving the condition garden culture. For starters, you should try spraying the cucumber beds with a solution of whey. For one bucket of water you will need 2 liters of whey and half a glass of sugar.
To get rid of pests, use onion or garlic infusion. One one and a half liter jar of dry onion peel is enough to prepare 10 liters of concentrated infusion. Infusion should be done like this:
- the husk is poured with a bucket of boiling water;
- insist all night until morning;
- the broth is filtered;
- the resulting drug is diluted (for 2 liters of infusion 1 bucket of water).
With this tool you need to spray the plants completely:
- leaves;
- stems;
- ovaries.
After processing the cucumber lashes, you need to pour the soil in the garden with the rest of the solution.
If yellowness has just begun to appear on the foliage, you can treat the bushes with a light pink manganese solution. With this tool, you can spray the beds for prevention, without waiting for the plants to get sick.
You can increase the fruiting time of an aging bush with the help of top dressing.
To this end, the aerial part of the plant can be sprinkled with infusions of herbs:
- dandelion,
- nettle,
- swans.
It is useful to water cucumber bushes with infusion of chicken manure or mullein.
Preventive measures
For this you need:
- maintain the principles of crop rotation and plant cucumbers every year in a new place;
- water the plants in a timely manner;
- mulch the root soil and row-spacing with a thick layer of hay or uprooted weeds;
- regularly feed the plants with herbal infusions, ash and mineral fertilizers;
- after the appearance of the first 3-4 leaves, treat the plants with any solutions with antiseptics.
Important! In order not to lose the crop, it is better not to wait until the plants get sick, but to regularly carry out disease prevention. Therefore, you need to know exactly how to process cucumbers so that the leaves do not turn yellow.
So that cucumbers in the beds do not hurt and do not turn yellow, you can do it at home effective remedy for preventive treatment of bushes. To prepare it you will need:
- laundry soap - 20 gr.;
- iodine - 30 drops;
- milk - 1 liter;
- water - 10 l.
All components are mixed with water, after which the composition is ready for use. Now they need to spray the whips and foliage of cucumber bushes.
Another way to protect the cucumber bush from diseases and increase its fruiting period:
- 1 loaf of bread is soaked in a bucket of water;
- bread is left to infuse in water for 12-14 hours;
- before use, 1 vial of brilliant green is poured into the composition;
- the resulting mixture is diluted in a ratio of 1:10;
- the solution is sprayed and watered with cucumbers.
The procedure should be repeated once every 10-14 days.
Once a month, you can water the plants with a solution of soda (1 tablespoon of the product per 10 liters of water). Soda solution is detrimental to pathogenic fungi.
Intensive watering in the greenhouse
If cucumbers grow in a greenhouse, after harvesting the remains of fruit-bearing plants, it is necessary to treat all structural parts of the structure with antiseptic preparations. They need to be sprayed from a spray bottle with a mixture of iodine and brilliant green diluted in water or any other suitable preparation. Means for treating premises from pathogenic fungi and bacteria can be purchased at specialized stores.
How critical is it not to fight yellowness on cucumber leaves; How will it affect fertility?
It is clear that no special measures need to be taken if the yellowness of the leaves is caused by natural causes, such as:
- lack of light;
- bush aging;
- sunburn.
The only thing that can be done in this case is to carry out foliar and basal feeding of the bushes. If dry leaves have appeared due to heat and scorching direct sunlight, shelters can be installed above the plants.
For your information! All of these reasons do not require urgent intervention.
If a pest is found on the beds or it is found that the plants are infected with infectious diseases, urgent measures must be taken to save the crop.
If you let things take their course, all the plants in the garden as a result will very quickly become infected and die. V best case cucumbers will drop their ovaries and yields will fall below the average.
processing methods garden plants quite a lot, each vegetable grower will have to independently choose how to spray the cucumbers so that the leaves do not turn yellow and do not wilt. Every year, amateur gardeners try new ways, preparations and home remedies for open beds and home greenhouses.
We always hope that they will sprout quickly, develop fully, and delight us with a magnificent harvest of juicy and sweet cucumbers. But this picture perfect. In practice, often things do not go so smoothly, and we often begin to face difficulties from the very moment of planting cucumbers. If you have prepared the seeds well, then most likely they will sprout successfully. But, and here you should not relax. It is necessary to constantly monitor and care for young shoots so that they can continue to develop successfully. And, rest assured, they will throw a lot of problems at you. One of these problems is the early yellowing of cucumber leaves. Your task is to prevent this!
If the leaves of cucumbers turn yellow. How to deal with it?
It is clear that if the leaves of a young cucumber begin to turn yellow, then something is missing. After all, this is still a very young plant, and not an adult bush, which has already given more than one bucket juicy cucumbers, and it's just time for him to turn yellow. The situation can be corrected different ways, starting from adjusting watering and ending with the processing of seedlings of cucumbers (or an already older plant) with various folk (or more "advanced") means.
Watering
It will definitely need to be adjusted. Without adjusting it, the leaves will still continue to turn yellow. If you succeeded in doing this, then further cucumbers will need to be supported with simple home solutions.
Option number 1
You need to start from the moment when shoots appear, namely, after the appearance of 3-4 leaves. We will prepare the composition from 30 drops of iodine, laundry soap - 20 grams, and 1 liter of milk. All this is simply added to a bucket of water.
Process cucumbers, namely, they need to be sprayed every 10 days, which will allow you to bring them back to life and avoid further yellowing of the leaves.
Option number 2
In the evening we take a loaf of bread and soak it in a bucket of water. And, in the morning we knead this bread, and pour iodine into it (the smallest vial). We dilute the liquid that we got (1 liter) in a bucket of water and spray cucumbers with it. What remains after breeding, we pour into a bottle and store it all in the basement or in the cellar.
As for the frequency of treatment with this solution, then you need to do this only 1 time in the 2nd week. This will allow you to keep both the cucumbers themselves green and their tops until the fall.
Option number 3
Milk whey (liter 2) is taken on the same bucket of water, plus another 150 grams of sugar is added to it. We process cucumbers with this “magic” solution, and even if the leaves are all the same, they will bear fruit later.
Option number 4
We take a jar with a volume of 0.7 liters, fill it onion peel, after which, we pour it into a 10-liter bucket, where we fill this husk with water. We boil it all, remove it from the stove, cover the bucket with a lid, and insist for 12-14 hours. After filtering, squeeze the husk and let it brew well.
Now, we take 2 liters of this infusion, pour 8 liters of water into it, after which, we pour abundantly all the leaves of the cucumbers. At the same time, they need to be watered not only from the top, but also from their bottom side. Plus, we also spray the soil itself.
Option number 5
Everything is very simple here - pour 5 liters of water and add a liter of whey there. Next, we process this simple composition.
Why cucumber leaves may turn yellow, and what to do, they will tell you in this video.
And one more video where they will tell you about a very easy way, which will help prevent yellowing of the leaves of cucumbers. Be sure to look.
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