Reasons for falling and yellowing ovaries of cucumbers in the greenhouse

Many people encounter growing vegetables with various problems. Some summer residents are interested in why the ovaries of cucumbers in the greenhouse fall. They try, look after the plants, create ideal conditions for them, and all the same, cucumbers turn yellow and fall off. There may be several reasons.We will examine each of them in detail.

Reasons for falling and elteniya ovaries cucumber in the greenhouse

Breaking light mode

Cucumbers, like many other plants, demanding the amount of light. Its deficiency leads to problems with the development of the bush. If you are planning to grow a vegetable in a greenhouse, you need to collect information on how to properly install it so that the lighting is complete.

When planting other vegetables in the greenhouse, it is worth remembering that some may interfere with their other shade. Do not repeat the mistakes of other summer residents who seek to accommodate as much as possible in the greenhouse. Before planting in the ground, consider how much seedlings you will need.Remember that the vegetative system of cucumber hybrids is well developed, so you need to correctly calculate what area each bush will need. It is recommended to plant from one to three shoots per square meter. Exceeding this norm can provoke that the plants will obscure each other, and in the future you will notice that the ovaries of the cucumbers turn yellow and fall.

Do not forget about the need to pinch the top of the shoots. If this is not done on time (while the shoots are still small up to 20-25 cm), the ovary may also fall due to lack of light.

Violation of the temperature regime

Remember that cucumbers in a greenhouse are temperature sensitive. The optimal values ​​are:

• before fruiting, when the weather is clear – from 22 to 24 degrees;
• before fruiting, when the weather is cloudy – from 20 to 22 degrees;
• before fruiting, at night – from 17 to 18 degrees;
• during fruiting, when the weather is clear – from 23 to 26 degrees;
• during fruiting, when the weather is cloudy – from 21 to 23 degrees;
• during fruiting, at night from 18 to 20 degrees.

Please note that for varieties that are pollinated by bees, the temperature should be slightly higher – 1-3 degrees.

If the temperature is above or below normal, the plants begin to dry out or become cold, respectively.Sudden changes in temperature also negatively affect the development of cucumbers. Most often, such a problem occurs in greenhouses, where the air heats up during the day, and at night it suddenly becomes cold. To set the temperature, we recommend that you use the following methods:

How to increase the temperature

To increase the temperature in the greenhouse:

1. Cover the cucumbers in the evening another layer of film and leave it overnight. Between her and the main shelter a distance of 2 to 5 centimeters should be maintained. Thanks to this, the temperature will increase by about 2-4 degrees.
2. Use a foamed film to protect the walls.
3. You can cover the ground with black film.
4. Use heaters.

How to lower the temperature

To lower the temperature in the greenhouse:

1. Take care of good ventilation. This will reduce the temperature by 10 degrees.
2. Water the bushes in the morning with plenty of water.
3. Reed mats and shields will help. They should be painted white. They will serve as protection against infrared radiation.
4. Shelters from the film can be sprayed with various solutions, for example, from chalk, clay or flour.

Lack of minerals

The ovaries can fall from a lack of minerals

The ovaries turn yellow and crumble when there are not enough nutrients in the soil and the cucumbers were not fed on time. The imbalance of fertilizers or their excess negatively affects the plants. Watering in large quantities leaches potassium and nitrogen from the soil, so the addition of these substances must be taken care of first. You should feed the plants every 7-10 days.

How to deal with the problem:

• reduce the use of manure or completely abandon it;
• spray the plants with a solution of urea and wood ash base;
• use special preparations that can be purchased in stores;
• fertilize the soil with wood ash.

High yields of hybrids

It would seem that this is a big plus. But, unfortunately, this characteristic can also play a negative role in the development of plants. Since almost every sinus forms an ovary, or even several, the plants lack a sufficient amount of nutrients. Then the extra ovaries of cucumbers fall. In order not to create an overload for cucumbers, remove the ovaries yourself – before the flowers appear.However, if you see that a small number of ovaries turn yellow, you can not interfere with the process, this means that the plant itself takes care of the optimal number of fruits and discards excess.

Violation of soil moisture

Watering should be given special attention. Before fruiting begins, water the cucumbers in moderate amounts, and then its intensity should be increased. The earth in the greenhouse should be sufficiently moist. But remember to keep a balance. Both deficiency and excess moisture adversely affect the plant. Use the following recommendations:

1. Do not water the cucumbers with cold water. Sometimes, and because of this, the ovary falls off.
2. Use warm water that has been infused. If the weather is hot, it is better to do this in the morning, if the air is cool – in the afternoon.
3. When the flowers begin to set, take a break in watering for several days. Thanks to this, there will be more female flowers.
4. Before flowering, water the bushes every 5-7 days, and after the beginning – every 2-3 days.

Insufficient pollination

This situation may occur due to adverse weather conditions. Bees do not fly if the weather is cloudy. If cucumbers are grown in a greenhouse, insects fly there very rarely, they do not like the stuffiness and heat inside the building. Some modern varieties of cucumbers are self-pollinating, in such cases, of course, there will not be a problem.What can not be said about the traditional varieties of these vegetables. If the female flower is not fertilized, the ovaries of the cucumbers fall.

There may be the following remedies:

1. You can pollinate the flowers yourself. To do this, you can gently fan the female flower with a previously torn male flower. Another option is to transfer pollen from a male flower to a female with a brush.
2. Another tip that can help is to attract bees. To do this, spray the cucumbers with a solution of honey.
3. The easiest option is to grow self-pollinated species of cucumbers.

Bacteriosis

If the ovaries turn yellow , this may be a sign of this unpleasant disease. The reason for this phenomenon is often an excess of moisture in the air and soil. Also, the disease can develop due to the fact that the cucumbers are planted at too small a distance from each other.

The cause of the disease can be temperature changes, bad soil, spots appear on the leaves that become brown, dry, and because of this holes appear in the leaves.

Conclusion

If you followed all the recommendations for caring for the bushes, and the ovaries still crumble and the cucumbers disappear, the plants may have been affected by a viral disease or you had poor-quality seeds . We hope that you don’t have to face such a problem, and cucumbers will delight you with an excellent harvest!