To grow a good crop of cucumbers is possible even for a not very experienced summer resident. This culture is rather unpretentious and does not require too much attention to itself. However, sometimes the owners of suburban areas still have all sorts of questions regarding the proper care of these plants. For example, about why the cucumber embryos turn yellow. There may be several reasons for this phenomenon.
Low temperature
When grown in open ground, this is the most common cause of ovarian fall. Cucumbers are thermophilic plants. The ovaries turn yellow and crumble already at a daytime air temperature below +16 degrees. If at night the air cools to + 10-12 degrees, all parts of the plant — stems, leaves, flowers — begin to die out. Of course, in central Russia, such weather in the summer is quite rare. Therefore, yellowing of the ovaries due to low temperature is a phenomenon characteristic, rather, for Siberia. It may be necessary to cover the cucumbers with foil to save the crop in this climatic zone. It can be pulled over arcs made of thick wire or plastic pipes.
Heat
Very often, summer residents are also interested in why the cucumber embryos in the greenhouse turn yellow . The reason in this case is the exact opposite. Plants may be too hot. At air temperatures above +32 degrees, pollen in the flowers loses its activity. That is, cucumbers are simply not pollinated. The problem in this case can be solved by regular ventilation of the greenhouse.
Sometimes the answer to the question of why the cucumber embryos turn yellow in the greenhouse lies in the wrong selection of varieties. For a greenhouse, self-pollinating hybrids should be taken. Indeed, bees fly into the greenhouse extremely rarely. In the event that the mistake has already been made and the “wrong” variety has been planted, the problem can be tried to be solved by attracting insects. For this, saucers with sugar syrup are placed throughout the greenhouse. They need to lay out the male flowers of cucumbers. In order for the bees to get inside the greenhouse, open transoms and doors more often.
Artificial pollination
If you cannot attract a sufficient number of bees, you can try the plant pollination process yourself. You need to do this from 6 to 10 in the morning. It is during this period of time that the pollen of cucumbers is most active.
For pollination, you need to prepare a soft brush. She is held along the stamens of several male flowers. Next, pollen is transferred to the female pistils. Soon after this procedure, a lot of ovaries appear on the lashes. You can also use another method - to pick a couple of male flowers and rub them with women. Since the pollen of cucumbers is sticky, this method can be even more effective.
Wrong watering
Why do the germs of cucumbers turn yellow? The answer to this question often lies in non-compliance with the technology for caring for these plants. Water the bushes with extremely warm water. Its temperature should be approximately +25 degrees. If it is lower, only male flowers will begin to develop in the plant. The existing ovaries on women will disappear.
Watering cucumbers on cold days should be at lunch, on hot ones in the morning and under the root. Ovaries can turn yellow not only from cold water, but also from a lack of moisture. In this case, the reason for the cucumber to fall is insufficient nutrition.
Micronutrient deficiency
Why do cucumber embryos turn yellow and fall even with good care? Another cause of this unpleasant phenomenon may be a lack of trace elements. Especially often, a similar problem also occurs in greenhouses. Typically, summer residents feed plants with nitrogen, potassium and phosphorus fertilizers, forgetting about microelements such as boron, zinc, copper, manganese, etc. Therefore, to solve the problem of withering ovaries, you should try to feed the plants with complex fertilizer for garden crops or wood ash.
Also, an excess of nitrogen in the soil can become the cause of poor embryo development. This macrocell contributes to the development of green mass of plants: leaves and stems. It can slow down the growth of ovaries.
Bush formation
The answer to the question of why the cucumber embryos turn yellow in the open ground and in the greenhouse may also include incorrect pruning of plants. Modern varieties and hybrids can produce just a huge number of ovaries. As a result, nutrients may not be enough for everyone. The yellowed ovaries in this case will hang on the plant with a dead weight. Therefore, it is so important to trim the cucumbers. In the greenhouse usually leave one main stem and several shoots. In open ground, cucumbers are cut only slightly, and only if the number of ovaries per lash exceeds 20-25 pieces.
Of course, already grown greenhouses should be torn off in time. As long as they remain on the lash, new embryos will not develop.
Bacteriosis
This unpleasant disease can also be the reason why the cucumber embryos turn yellow and fall off. This infection usually affects up to 30% of the fruits. At the same time, ovaries of yellow color appear on the ovaries and small cucumbers. Subsequently, the fruits rot.
Bacteriosis is usually treated with 1% Bordeaux fluid. You can also use some kind of fungicide. For example, "Hom". This drug is diluted in an amount of 40 g per 10 liters. Spraying is carried out at the rate of 1 liter per 1 m 2 . You should also pick off fading female and male flowers.
You can prevent infection with bacteriosis by warming the seeds before planting at a temperature of 60-70 degrees for 1-2 hours. You can also pickle planting material with TMTD in the amount of 3-4 g per kilogram. Autumn from the beds must be removed all the tops. It is especially important to carry out this procedure in a greenhouse, where favorable conditions arise for the development of bacterial infections.
Why do the cucumber buds on the balcony turn yellow
Those who do not have their own summer cottage often grow this plant on loggias. Cucumbers are an unpretentious culture, and therefore feel very good in such conditions and can produce good crops. However, sometimes the problem of yellowing of the ovaries occurs when growing on the balcony. There may be several reasons for the fall of female flowers.
As in the greenhouse, the answer to the question of why the embryos of cucumbers on the loggia turn yellow can be too high a temperature, lack of pollination or lack of trace elements.
This problem can also occur, for example, due to a lack of nutrients. The containers for cucumbers on the balcony should be used quite large (buckets, deep drawers, etc.). The earth in them should be poured oily garden. It is also good to feed the cucumbers in the early stages of development with a mullein solution, and in the later stages with complex mineral fertilizer for indoor plants.
Bacteriosis can also cause germination, even though there seems to be no source of infection on the loggia. Experienced summer residents advise warming up or disinfecting seeds before planting for good reason. Often, the disease is already in the planting material.
Thus, we have found out why the cucumber seeds in greenhouses, on the balcony or in the open ground turn yellow. The main reason for this phenomenon is, as you see, improper care. Also, such a nuisance can occur due to infection of plants and adverse weather conditions.