Why do the embryos of cucumbers turn yellow in the greenhouse, in the open field?
Even an inexperienced summer resident can grow a good harvest of cucumbers. This culture is quite 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, why the embryos of cucumbers turn yellow. There may be several reasons for this phenomenon.
Low temperature
When grown outdoors, this is the most common cause of ovary shedding. Cucumbers are thermophilic plants. The ovaries turn yellow and crumble even at daytime air temperatures below +16 degrees. If at night the air cools down to + 10-12 degrees, all parts of the plant, without exception, begin to die off - stems, leaves, flowers. Of course, in central Russia, such weather in the summer is quite rare. Therefore, yellowing of the ovaries due to low temperatures is a phenomenon that is more typical of Siberia. Perhaps, to save the harvest in this climatic zone, the cucumbers will have to be covered with foil. It can be pulled over arcs made of thick wire or plastic pipes.
Heat
Very often summer residents are interested in, among other things, why the embryos turn yellow. The reason in this case is the exact opposite. Plants may be too hot. At air temperatures above +32 degrees, pollen in flowers loses its activity. That is, cucumbers simply do not pollinate. The problem in this case can be solved by regularly ventilating the greenhouse.
Sometimes the answer to the question of why the cucumber embryos turn yellow in the greenhouse lies in the wrong selection of the variety. Self-pollinating hybrids should be taken for the greenhouse. After all, bees rarely enter the greenhouse. In the event that a mistake has already been made, and the "wrong" variety is planted, the problem can be solved by attracting insects. For this, saucers with sugar syrup are placed throughout the greenhouse. In them you need to decompose the male flowers of cucumbers. In order for the bees to get inside the greenhouse, transoms and doors should be opened more often.
Artificial pollination
If you cannot attract a sufficient number of bees, you can try the procedure yourself. This should be done 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 carried over the stamens of several male flowers. Then the pollen is transferred to the female pistils. Soon after this procedure, many ovaries will appear on the lashes. You can also use another method - pick a couple of male flowers and rub the female flowers with them. Since the pollen in cucumbers is sticky, this may be even more effective.
Improper watering
Why do cucumber embryos turn yellow? The answer to this question often lies in non-compliance with the technology of caring for these plants. Water the bushes with extremely warm water. Its temperature should be about +25 degrees. If it is lower, the plant will begin to develop only male flowers. The existing ovaries on women will disappear.
On cold days it should be at lunchtime, on hot days - in the morning and at the root. Ovaries can turn yellow not only from cold water, but also from lack of moisture. In this case, insufficient nutrition becomes the reason for the falling off of the cucumbers.
Lack of micronutrients
Why do cucumber buds turn yellow and fall off even with good care? Another reason for this unpleasant phenomenon may be a lack of trace elements. This problem occurs especially often in greenhouses. Usually summer residents feed the plants with nitrogen, potash and phosphorus fertilizers, while forgetting about such trace elements as boron, zinc, copper, manganese, etc. Therefore, to solve the problem of ovary wilting, you should try to feed the plants with complex fertilizer for garden crops or wood ash.
Also, the reason for the poor development of embryos can be an excess of nitrogen in the soil. This macronutrient contributes to the development of the 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 embryos of cucumbers turn yellow in the open field and in the greenhouse may also lie in the wrong pruning of plants. Modern varieties and hybrids can produce just a huge number of ovaries. As a result, there may not be enough nutrients for everyone. In this case, yellowed ovaries will hang on the plant as a dead weight. Therefore, it is so important to prune cucumbers. In a greenhouse, one main stem and several shoots are usually left. In the open field, cucumbers are cut only slightly, and only if the number of ovaries per lash exceeds 20-25 pieces.
Of course, the already grown greens should be picked in time. As long as they remain on the scourge, 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 fetuses. At the same time, weeping sores of yellow color appear on the ovaries and small cucumbers. Subsequently, the fruits rot.
Bacteriosis is usually treated with 1% Bordeaux liquid. You can also use a fungicide of some kind. 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. Fading female and male flowers should also be picked off.
You can prevent bacteriosis infection by warming up the seeds before planting at a temperature of 60-70 degrees for 1-2 hours. You can also etch the planting material with the TMTD preparation in the amount of 3-4 g per kilogram. In the fall, it is imperative to remove all the tops from the beds. It is especially important to carry out this procedure in a greenhouse, where conditions are favorable for the development of bacterial infections.
Why do cucumber buds turn yellow on the balcony
Those who do not have their own summer cottage often grow this plant on loggias. Cucumbers are an unpretentious culture, and therefore they feel very good in such conditions and can give good yields. However, sometimes the problem of yellowing of the ovaries arises when growing on the balcony. There may be several reasons for the loss of female flowers in this case.
As in a greenhouse, the answer to the question of why the cucumber embryos on the loggia turn yellow may be too high a temperature, lack of pollination, or a lack of trace elements.
Also, this problem can arise, for example, due to a lack of nutrients. Use containers that are large enough (buckets, deep boxes, etc.). The earth in them should be poured into a greasy 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 a complex mineral fertilizer for indoor plants.
Bacteriosis can also cause embryos to drop, even though there seems to be no source of infection on the loggia. Experienced summer residents advise to warm up or disinfect seeds before planting for a reason. Often, the disease is already covered in the planting material.
Thus, we have found out why the embryos of cucumbers turn yellow in greenhouses, on the balcony or in the open field. The main reason for this phenomenon is, as you can see, improper care. Also, a similar nuisance can occur due to infection of plants and unfavorable weather conditions.