Why does the ovary turn yellow in cucumbers in a greenhouse?

Sometimes, when growing vegetables, for some reason, the ovaries of cucumbers in the greenhouse turn yellow. This leads to the fact that the gardener does not receive a satisfactory harvest. There are many reasons for this phenomenon. In this article, we will discuss what to do to avoid this.

It is very unpleasant when, despite the care, the plants get sick and wither. Yellow ovaries - one of the most common misfortunes among cucumbers. Let us examine the reasons for which it appears.

• Lack of proper lighting. Cucumbers are a variety of vegetable crops that are most demanding for long daylight. The lack of light causes the plants to turn yellow and begin to fall.
• Early age. For good nutrition of the ovaries, cucumber bushes must be formed in order to fully nourish them. And young vegetable crops get rid of the leaf apparatus, because they themselves are not sufficiently strengthened.
• Temperature drops. The temperature regime is very important; no abrupt changes should be allowed. The ovaries also turn yellow because of the fact that it can quickly become cold at night, during which they grow. In these cases, the root system can begin to dry out and wither, because in cold earth it does not get enough nitrogen from the soil.
• Lack of fertilizer. If the soil is not sufficiently saturated with mineral elements and is not fertilized, a sudden yellowing of the cucumber ovaries is possible.
• Abundance of ovaries. Every gardener hopes for a high yield, and this may not always be good. After all, the more formed ovaries in the cavities, the more the vegetable culture begins to absorb the important elements. Even the strongest hybrid is not able to provide normal nutrition, it just stops developing.

• Insufficient watering. In the process of growth, development and formation of cucumbers should ensure proper watering. Before the appearance of the first fruits should be moderately moisturize, but not abundant. But when cucumbers look intensively, you need to increase the process of watering. That is, you need to adhere to the fact that the plant is not dry and does not use excessive water.
• Bacteriosis This unpleasant disease appears as a result of high soil and air humidity. The disease is manifested by the appearance of yellow spots on the foliage.
• Lack of pollination. When varietal cucumbers grow in greenhouses, the bees pollinate inadequately pollinated. Insects very rarely fly into the greenhouse in hot weather due to the fact that the room is very stuffy.
• Rot. Often there is yellowing also because the plant becomes ill with such unpleasant diseases as white and gray rot (with some of the ovaries still hanging on the branches) or a cladoceride (infecting young embryos).
• Thickening seedlings. Thick landing - this is the main mistake novice gardeners. Despite proper care, plants will not get the nutrients they need. Not enough moisture and lighting.
• Pest invasion. The most popular are aphid, mite and whitefly.

To provide cucumbers with sufficient light, you need to think about it even at the time of planning the installation of the greenhouse.

• Do not plant too tightly the plants, which in the process of growth will overtake each other in height, while shielding the lower ones from daylight.
• In the greenhouse should be good lighting from all sides. To do this, you need to properly orient its location. The most suitable place is from the east to the west. And if your site is located in the southern regions, you should place it from north to south.

It is recommended to trim a little of the stems and observe that the length is not more than 22 cm. Too long shoots take away the strength from others and start to wither.

During the growth of cucumbers, it is necessary to remove all the blossoms and buds from the bosom of the very first five leaves, since they will not form into full-fledged greens anyway.As soon as the first ovaries appear, it is necessary to remove the lower leaves to increase the flow of nutrients from growing greens. Therefore, pruning 2 leaves for every 6 day. As a result, in the middle of growth, cucumbers get a bare stem about 1 m long.

There is an ideal temperature regime in which cucumbers feel good and give a great harvest. In more sunny weather - this is 20-25 degrees. If it is overcast outside the window, but you need to stick to 20 degrees. At night, the temperature should not fall below 16 degrees. During the fruiting period it is recommended to slightly increase the performance. It should be noted that the highest temperature for such vegetable crops is about 35 degrees, and the lowest - 14.

If not to observe the above described temperature mode, then sensitive ovaries will turn yellow and fall off. Not a single crop will survive sharp drops, as it also affects the condition of the soil. There are several techniques to raise the temperature during the cold season.

• Cover the cucumbers at night with a film. To do this, you need to make a small distance between the main coating and an additional 3-6 cm. You will be able to keep warm and slightly raise the temperature.
• To build a canopy of rods and wire. Thus, you reduce the amount of air. It is recommended to cover with perforated film with a thickness of not more than 0.6 mm.
• For small plants, it will be good to cover the soil with a dark-colored film, and you can also cover it with hay or fresh sawdust.

If the summer is droughty and the temperature rises to impossible indicators, you should use the following tips.

• When planning a greenhouse, do not forget to let the air in and wind the beds.
• It is recommended to organize watering of plants in the morning.
• It is necessary to moisten the film coating with a special solution to create a shading effect. To do this, you will need 3 kg of chalk, clay or flour. They are added to the mixture consisting of 11 liters of water and 500 ml of fresh milk.

Partenocarpic hybrid of cucumbers is very picky about nutrition and especially eats nutrients from the soil (especially potassium and nitrogen). Therefore, their lack of soil must be compensated. For this:

• discard organic fertilizers, in particular manure;
• more often feed the culture with wood ash;
• use special drugs such as Mortar and Brexin Calcium.

First of all, it is worth remembering that you can not pour cold water. This culture is quite thermophilic and can get rid of the ovaries ahead of time.

Water should be taken at room temperature and should be separated. In hot days it is better to water from the very morning, but it is possible even after sunset. In the days when it is cloudy and cool, day watering is not forbidden.

In order to set fruit before flowering stage, you should spend about 4 liters of water per square meter every 6 days. It is necessary to increase the amount of watering at the time when the fruits appear. To do this, take 10 liters per 1 square meter and irrigate every other day.

To avoid bacteriosis in crops, do the following:

• spray the plant with a 1% solution of copper sulfate mixed with lime milk;
• use drugs such as "Fundazol" and "Topaz".

When a disease such as rot appears, the plant should be treated with copper. In case of cladosporia, it is recommended to use Pseudobacterin and Gamiar for irrigation.

There are also infectious diseases in which the ovary falls. The treatment is carried out with skimmed milk. It is necessary to add a couple of drops of iodine and soap to a liter of milk. The finished solution is watered cucumbers at the very root.

In order to avoid the invasion of harmful insects, you can make an infusion of red pepper. Pepper is poured with hot water and infused for 24 hours, then a mixture of soap with wood ash is added there. Also, insects do not like the infusion of onion peel. Cooking is to take one to one husk with water and bring to a boil. Then insist for 12 hours. The finished solution is used for spraying.

If the plant is still attacked by pests, then an infusion of potato tops, as well as the use of insecticides, will help.

To ensure that cucumbers are properly pollinated, need to follow a few rules.

• Pollinate inflorescences can and personally. To do this, it is necessary to pull out the male inflorescence (it is easy to distinguish it, only the stamen with pollen will be on the inflorescence) and slightly drop the pollen, carefully touching the female inflorescence.
• You can lure the bees. For this you need a solution with sugar, honey and water.

We should not forget that in the greenhouse, as well as on the open field, crop rotation is important. We must not allow one and the same culture to grow on the same bed year after year. In the soil can accumulate pathogens of various diseases that are dangerous for this plant. In addition, the plant will suck out all the useful elements from the soil, leaving nothing for the next generation.

However, many growers use the greenhouse exclusively for growing cucumbers alone. There is a way out of this situation - it is a sideration. Siderats are important plants that fill the soil with essential minerals and nutrients.

To ensure a rich crop of cucumbers, to obtain healthy fruits and to prevent yellowing of the ovaries, it is enough to follow certain rules of care.

• Do not forget to pinch cucumbers, because they form a huge green mass.
• It is recommended to feed the plant steadily, because it is as important as watering. This is especially true of the period when there is a rapid growth of green leaves. Cucumbers need components such as nitrogen and phosphorus, so irrigate the buds with a solution of wood ash and calcium nitrate. Mineral supplements can also be used in small doses.
• We must not forget that it is necessary to harvest in time and avoid over-ripening. Then the young cucumbers will receive important nutrients for them. Crop harvested every 2-3 days.

There are no pollinated cucumber varieties. At the stage when Zelentsy are tied, they do not need pollen. If it falls on their inflorescences, then a certain part of the ovaries will turn yellow and disappear, the rest will be an ugly, curved shape. In order for this not to happen, it is recommended:

• keep the distance between two varieties of cucumbers (needing pollen and not needing) at least 600 meters;
• Cover cucumbers with special bloody material to prevent pollen from entering.

There are also unforeseen circumstances that the vegetable grower cannot predict. It's lingering cold weather. Since cucumber is a heat-loving plant, it is worthwhile to put a temporary heater to regulate the temperature. There are growth stimulants with which cucumbers will be resistant to adverse factors and will begin to grow even in a cool microclimate. After such stimulation, it is necessary to saturate the culture with organic supplements.

See why the cucumber ovary turns yellow in the next video.