Why do cucumbers turn yellow leaves - in the ground, in greenhouses and near seedlings

Even those summer residents who have kept a plot for a very long time and grow various crops on it, there are times when the leaves of cucumbers turn yellow. What is the reason for the discoloration of cucumber leaves, and what measures should be taken to avoid this?

Why do cucumber seedlings turn yellow leaves

In general, it takes a lot of effort to grow cucumber seedlings. If you do something wrong or care is disrupted, the leaves may turn yellow. This phenomenon is called chlorosis.

As a rule, it can occur when a second true leaf appears on the seedlings. Cases when the cotyledons turn yellow are not so common.

If you see that the leaves have turned yellow, it means that the plant does not like something, and you need to take action. Seedling leaves can turn yellow for a variety of reasons.

- Small amount of light
- The volume of the container in which the plant is grown is less than necessary, as a result of which the seedlings feel uncomfortable, and the nutrition to the plants is worse
- Perhaps a young cucumber lacks nitrogen fertilizers
- Also, the reason may be suboptimal water level
- Various fungal diseases can also lead to yellowing of the leaves, as well as insect pests
- If the air temperature is below normal, and, more specifically, less than 17 degrees, then the plant does not eat well
- Chlorosis can occur after transplanting seedlings.

What actions need to be taken?

First of all, if you see that your seedlings have turned yellow, you need to ensure that the leaves turn green again.

The conditions in which the plant grows should be checked. You may need to move the seedlings to some other place where there is more light or where it is warmer.

It is also necessary to reconsider watering. It may need to be increased or decreased.

In addition, you need to feed the seedlings. You can use complex fertilizers such as Kemira, Ideal. In addition, it is good to process the leaves of the plant by spraying with special preparations. Ideal for Epinom.

If you find out that the reason for the yellowing of the leaves is pests, then you need to purchase special means against parasites such as spider mites and aphids. You can treat the plant with a weak solution of laundry soap or use Fitoverm. If the plant is sick with any fungal disease, the use of Topaz will be effective.

Falling plant ovaries

If the ovaries of cucumbers have also become yellow, then there are also several reasons that lead to this problem.

- Plants may be planted too often or you are forming the leaves incorrectly and they are growing too densely
- Plants may be lacking in some nutrients
- The crop must be harvested on time, as this leads to the fall of the ovaries
- If the plants are not pollinated, then the ovaries may also die
- Improper plant care can also be the cause of what is happening, for example, plants are not watered enough or grow in the shade.

It must also be remembered that different cultures tend to form a number of ovaries, slightly more than he then has enough nutrients for this. In this case, the plant sometimes deliberately sheds excess flowers.

In order to preserve as many ovaries as possible, you must:

- First, keep the distance between plants, according to the instructions; - Cucumbers that stretch far up must be pinned so that the plants receive as much light as possible
- You should also fertilize the plants. In addition to manure fertilizers, potash and phosphorus compositions should also be applied.
- Harvesting is necessary in a timely manner, without waiting for seed fruits
- If the plant variety is such that it is necessary to pollinate, then it will be correct to place next to those varieties that are pollinators
- It is also necessary to loosen and water the plants on time, and when frost or a sharp cold snap sets in, you can process cucumbers with Epin or Zircon.

When you see that almost all the existing ovaries have turned yellow, you should sound the alarm, as you can completely lose all the fruits. Therefore, here you should be attentive to the seedlings and examine the plants for the presence of chlorosis, as well as identify the cause of this in time.

Why do cucumber leaves turn yellow in the open field

Chlorosis can also overtake cucumbers that are grown outdoors.
Here the disease goes a little differently. Perhaps only the leaves at the base will turn yellow, or even the fruits themselves may change color.

This can be facilitated either by their overgrowth, or the plant was not properly cared for, or pests attacked it, and the plant got sick.

If the leaves in the middle of the plantings turn yellow, this should not alert you, since it is a normal process and the yellowed leaf will simply need to be removed.

It is also necessary to correct the irrigation system, since there should be no stagnation of water, and at the same time the soil should not be dry. Cucumbers are moisture-loving plants and should always grow in temperate climates.

Often, if the leaves of cucumbers turn yellow, it means that such a pest as aphids attacked them. Special drugs are sold against this pest, for example Fitoverm. In order to protect plants from aphids, it is necessary to keep the cucumbers planted in the open field covered, for example, with a non-woven covering material.

Fungal diseases such as powdery mildew, peronosporosis are also common among cucumbers, so it is necessary to take preventive measures in time and remove diseased leaves on which spots were found or that have changed their color. Moreover, they must not only be torn, but also completely destroyed, since they are carriers of the disease. The remaining healthy bushes should be treated with Trichodermin infusion.

If suddenly you noticed that the leaves not only changed their color, but also withered, and the plant itself no longer holds, as before, then the cucumber was attacked by root rot. Unfortunately, this plant should only be dug up by the root and also destroyed. Root rot tends to appear in those beds where there is too much moisture, especially if the air temperature is insufficient. In such conditions, the disease progresses rapidly, and the roots begin to rot. Trichodermin will also help here, which should be applied during heavy rainfall or during a drop in air temperature.

Cucumber leaves turn yellow in a greenhouse

Very often, cucumbers are grown in greenhouses, especially since at present there is a wide range of different designs that can be made right on your site. Cucumbers grow very well in greenhouses and gardeners get an excellent harvest. However, incidents can still occur.

If the leaves on the cucumbers in the greenhouse turn yellow, then the rules for caring for the plant have not been followed. Since the soil does not change, a special climate is formed in the greenhouse, and one diseased plant can very quickly infect all other bushes.

First of all, you need to follow the rules of care: monitor the light level and good ventilation in the greenhouse;

- Plants should be properly formed so that they do not grow too densely
- To protect plants from chlorosis, it is necessary to plant seedlings only when the soil has warmed up enough
- Plants should be watered with warm water heated in the sun during the day. So, you save plants from root rot
- To prevent cucumbers from getting infected with fungal diseases, you should cultivate the land with Trichodermin.

It is very useful to place containers with manure solution in the greenhouse, since carbon dioxide released as a result of manure fermentation has a beneficial effect on cucumbers. You can also use barrels of herbal infusion.

Yellowing of indoor cucumbers

If you grow cucumbers on the balcony or on the windowsill in your home or apartment, the plants can also be affected by chlorosis. First of all, this can happen due to a lack of light.

Also, the causes of chlorosis can be an incorrect watering regime, an incorrectly selected water temperature, and the level of air humidity greatly affects the development of a plant. Cucumbers on the windowsill, despite their unpretentiousness, must also be fed with nitrogen and other complex fertilizers. In addition, insect pests can attack plants, even those that grow in your home. The wrong plant variety and soil composition can cause chlorosis.

If you notice that the leaves have begun to turn yellow, first of all, you should move the container with plants to some other window, where there is enough light, or add lighting artificially using special lamps.

If the tips of the leaves begin to dry out, the plant may not have enough water or the air in the room is too dry. At the same time, it is rational to put protective screens.

If pests are found, the plant should be treated with some folk remedies, since the use of insecticides for plants that bear fruit is prohibited. A solution of laundry soap or garlic works well.

If only the lower old leaves have turned yellow, then there is no need to be afraid of this. Dry plates should be removed.

If the color has changed not only the leaf itself, but also the veins of the leaf, then the plant has little nutrition, and it is necessary to add some kind of fertilizer complex. The natural fertilizer Ideal is optimal here.

It should also be remembered that for home cultivation, it is necessary to choose the right cucumber variety and soil composition. As a rule, self-pollinated hybrids are planted at home, and which are bred specifically for growing on the balcony. And you also need to use a suitable soil composition with a neutral acidic reaction.

Thus, a change in the color of the leaves always indicates the possible ailments of the plant. In this case, cucumbers. It is necessary to find out the cause of chlorosis in a timely manner and take the necessary measures in order to preserve the plant and the harvest.