Cucumbers turn yellow in the greenhouse: what to do and how to deal with it

When cucumbers turn yellow in a greenhouse, what to do is the first question that gardeners have. First of all, you need to determine why the problem occurred. This may be a violation of agricultural technology, and a lack of nutrition, and pest infestation.

Why do cucumbers turn yellow in a greenhouse

Experts identify 5 reasons why the color of the tops of cucumbers in the greenhouse changes.

Leaf turns yellow in case of:

• wrong watering;
• lack of lighting;
• lack or oversaturation of the soil with nutrients;
• infection with pathogenic bacteria and fungus;
• presence of pests on leaf plates.

In this situation, the green mass on the lower part of the plant most often suffers. If the cucumbers turn yellow in the ovary, then the reason lies in problems with pollination or plant overload. To solve it, it is necessary to remove some of the embryos and flowers. The answer to the question of why the fruits of cucumbers turn yellow in a greenhouse is frost. As a result of a sharp temperature drop, a young crop could die or be seriously injured. This also applies to flower stalks. In addition to the above problems, the ovary is affected by nutrient imbalance, improper agricultural practices, and pest infestation.

Finding out why the fruits turn yellow, you should pay attention to plant care. With proper agricultural technology, a change in color causes overripeness. It leads to the fact that the cucumbers outgrow in size, the peel acquires a yellowish tint, the flesh becomes less crispy.These non-hybrid cucumbers are suitable for seed collection.

Knowing why the tops wither in the greenhouse and how to deal with it, you can avoid serious problems in a timely manner.

Why cucumbers turn yellow in the open field

The reasons why cucumbers turned yellow in open ridges may be similar to greenhouse ones. A number of factors affect the color change of the cucumber leaf plate.

1. Wrong watering. The lack of moisture affects the loss of leaf turgor. Yellow dry spots form on it, which lead to the withering of the entire plate. If watering is excessive, then the root system begins to rot, which also causes the leaf to turn yellow.
2. Burn formation. When watering in the sun, the drops remaining on the leaf plates dry out quickly, which leads to a burn.
3. Wrong neighborhood. Cucumbers don't grow if the wrong place is chosen for them. Bad predecessors are pumpkin, squash, watermelon. After them, pathogenic bacteria remain in the soil, and there is also a lack of nutrients needed by cucumbers.
4. Place. The reason may be hiding in the wrong place. Too much sun, strong drafts, waterlogged soil is not good for a growing seedling.

Not only leaves, but also the ovary of cucumbers can turn yellow. This moment is most often associated with:

• excessive ovary formation;
• pollination problems;
• violation of the rules of agricultural technology;
• temperature difference;
• infection with diseases;
• lack of fertilizer.

The answer to why a cucumber turns yellow inside is:

• lack of oxygen in the soil;
• insufficient soil moisture;
• affected by infections (peronosporosis, fusarium wilt).

Effective ways to combat yellowing

It is important not only to know why cucumbers turn yellow on the ridges and in the greenhouse, but also what to do in such a situation. Often the solution to the problem requires changing the conditions of keeping plants or treating them with disinfectants.

Features of agricultural technology

Violation of growing conditions often leads to the fact that cucumbers turn yellow and dry leaves, ovaries or the fruits themselves. For this vegetable, it is important to make the conditions as optimal as possible.This applies to ridges under the film and in unprotected soil. In order for vegetables to grow well, they need warmth, timely watering and top dressing. If cucumbers are yellowing in the greenhouse, what to do depends on what the problem is.

Often, the reason is hidden in untimely watering. As a result of a lack of moisture, the soil overheats, the leaves begin to turn yellow, then they dry. Cucumbers are moisture-loving plants. But it is important to follow a number of rules.

1. Water quality. For cucumbers, it is recommended to use settled water.
2. Temperature. To prevent cucumbers from turning yellow, use heated water.
3. Regularity. Young cucumbers require regular watering. During the heat, watering is carried out daily in the evening. In case of frost, the amount of water is reduced. Watering is transferred to the morning.

Another important factor to consider before planting is heat.Low temperatures can be the reason why cucumbers dry in the greenhouse. To solve it, it is important that a constant temperature is maintained in the room. If the air is too hot, airing will be organized.

Feeding and fertilizer

Often the reason why cucumber leaves turn yellow is improperly prepared soil. This problem is especially felt when cucumbers grow in a polycarbonate greenhouse. In such cases, it is not possible to change the soil annually or enrich it naturally. Accordingly, the question arises of how to feed the cucumbers in order to avoid the appearance of yellow leaves or ovaries.

If cucumbers are already planted, then they must be fed during the season with potassium, wood ash and other mineral compounds. With a lack of nitrogen, urea helps well from fertilizers.

Experts recommend planting plants in prepared beds. For this, mullein is first introduced into them. It is important that only rotted manure is used. Fresh leads to a burn of the roots. From folk methods, top dressing with infusion of chicken manure shows high efficiency.

Pest and disease control

The reasons why cucumbers turn yellow in a greenhouse or in unprotected soil include infection with pests or other diseases. Experts note a wide variety of pests that lead to a change in the color of the tops or damage to the crop.

1. Bacteriosis. The defeat of plants is associated with a violation of the rules of agricultural technology. Excess moisture leads to yellowing of the ovary. During the formation of young fruits, a yellowish coating forms on them, then warts and ulcers form.The plant ceases to bear fruit and dies. Bordeaux mixture is used as a treatment against bacteriosis. In order not to turn yellow leaves and fruits, it is enough to spray the plants and remove already wilted leaves and affected cucumbers. Subsequently, excess moisture in the soil should be avoided.
2. Powdery mildew. The disease is characterized by a change in the color of the leaves. They first turn yellow, then dry. The disease affects plants, both in the greenhouse and in the open field. Fungicide preparations are used to fight.
3. Fusarium wilt. In the greenhouse, yellowing of cucumbers is associated with this disease. Fusarium is transmitted through the soil and leads to the loss of most of the crop. The fight requires the processing of soil, plants and all equipment that is used for work. Yellowed tops, fruits and plants are completely removed and burned.
4. Aphids. The pest often infects plants under a film coating or in open ground. You can find it on the back of the sheet. For the fight, special drugs are used. Also, landing next to the beds of garlic, fennel, marigolds, mint effectively helps against aphids.
5. Angular spotting. The disease is characterized by the appearance of yellow or whitish spots. The tips of the leaf plates dry out, curl. The disease actively progresses at high humidity and high temperatures. Greenhouse plants are more susceptible to it. For the fight, 1% Bordeaux liquid is used.

To prevent cucumbers from turning yellow in the greenhouse, it is necessary to regularly carry out preventive work against the spread of diseases and pests. They consist in observing a number of rules.

1. Decontamination. Before planting the plants, the soil must be disinfected. For this, chemicals or a solution of manganese are used.
2. Prevention of pests and diseases. To prevent diseases from being transmitted to a new crop, all dried greens are removed from greenhouses during the harvesting period.
3. Weeding. In a greenhouse and on open ridges, it is necessary to regularly weed the soil. Weeds are not left in the aisles, but disposed of in compost heaps or burned.
4. Removal of affected plants. If the leaves turn yellow and dry, they must be removed immediately. Also come with the ovary or fruit.
5. Compliance with the rules of agricultural technology. The greenhouse maintains a constant temperature, avoiding drafts and excess moisture or drying out of the soil.
6. Timely pest control. Planted seedlings are treated against pests several times a season.

Compliance with preventive measures, as well as knowing the reasons why cucumbers turn yellow, allows you to avoid problems in a timely manner and get a bountiful harvest, both in the greenhouse and in the open field.

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