Why do the ovaries of cucumbers turn yellow and dry
To get a rich harvest, the gardener has to perform a number of specific actions: sowing seeds, watering, fertilizing, etc. it is from them that the further result depends. It is possible that in the process of plant growth problematic situations may arise, and then the gardener begins to ask quite logical questions: why does the ovary of cucumbers turn yellow and dry, and what should be done in this situation?
The ovaries of cucumbers turn yellow and dry
According to the results of the surveys, often those vegetable growers who grow this vegetable crop not in open space, but in greenhouses, often face this problem. Another reason is that the gardener independently creates all the conditions for this to happen. The specialists who conducted the research have identified a number of main reasons:
- Violations of the temperature regime;
- High yield of hybrids;
- Bad work of insects;
- Lack of light;
- Excess or lack of moisture in the soil;
- Improper use of mineral fertilizers.
To find the answer to the question: why do the ovaries of cucumbers turn yellow, it is important to carefully analyze each cause.
Permissible ambient temperature for growing: sunny day 21-24 degrees, cloudy not lower than 22 degrees, at night 16-18 degrees. As soon as the fruiting period begins, the indicators increase by 1-2 degrees, respectively. If the grower produces those varieties that need bee pollination, then the temperature rises a few more degrees. In the case when the temperature of the earth drops to 13-14 degrees, under such conditions the ovary of cucumbers turns yellow and after a while they decay.
It is also important to mention here: why the ovaries of cucumbers grown in closed greenhouse conditions turn yellow. Very often this happens due to changes in the temperature background. The film coating transmits light well, therefore, on a hot day, the air inside can warm up to 35-40 ° C, which is why plants overheat. At night, the polyethylene releases the accumulated heat, so a sharp temperature drop occurs inside the building, leading to falling leaves and ovaries.
High Hybrid Productivity
The uniqueness of modern plants is that many of them were created piece by piece, so they get the label "hybrids". Growing such varieties, the grower receives both positive and negative consequences. The positive can be considered:
- high yield;
- disease resistance;
But there is a negative side, which becomes the reason: why the ovaries of cucumbers turn yellow. The thing is that in the sinuses of almost every leaf there is one or several ovaries, so the plant spend most of its vital resources on the full development of each of them, because of the similar load, yellow spots may appear on the cucumbers, and over time they simply rot before flowering. To influence the process, it is necessary to remove the extra ovaries in time, and this is done until the flowers bloom.
Bad insect work
Un dusty inflorescences fall off
Very often, the cause of yellowing or falling flowers on cucumbers is the poor performance of insects (bees). They are very sensitive to weather conditions, they rarely fly into a hot polyethylene shelter. Even if a bee tries to transfer pollen in such conditions, it becomes sterile and unsuitable for pollination. Accordingly, the unfertilized cucumber ovary withers and falls.
Lack of light
Any plant needs light, and cucumbers are very demanding of this, since the lack of light lighting negatively affects the development of culture.
There may still be a shortage of light due to the fact that during landing the landing standards were not respected. Often, gardeners plant as many bushes, completely ignoring the fact that as soon as they sprout, they will interfere by creating a shadow. To prevent such situations, you need to accurately calculate the number of bushes that can be planted per square. m
Hybrid varieties have a well-developed vegetative system, therefore, when planting such plants, you need to know a few points: how to properly set the greenhouse so that it is well lit, and also as the recommended nutrition area, on average, parthenocarpic varieties are planted 1 per 1 sq.m. maximum 2 seedlings. Bee pollinated hybrid plants can plant a maximum of 3 pcs. on 1 sq.m. If you do not adhere to this planting scheme, yellowing may appear on the cucumbers and the flowers simply fall off, as the grown bushes will begin to give a shadow.
If the gardener noticed that the ovary of cucumbers is drying up, this can happen due to the fact that the bush was not formed. Cucumber tops have very branching shoots; if they are not removed, they will begin to obscure one another. The upper part is pinched, if the length exceeds 23-25 cm, such shoots weaken the bush, so the ovaries fall off, in some cucumber rot appears).
The formation must begin with stripping of the sinuses, since the rudiments of shoots, antennae and flowers are located in them. As they develop, these parts need more nutrients, and this leads to weakening of the root. If the rudimentary elements are removed in time, then it will be like treatment of the mother bush, since it will not waste all resources on the nutrition of unnecessary branches, therefore, it becomes possible to develop a strong system.
Excess or lack of moisture in the soil
Any vegetable crop needs proper and timely irrigation, otherwise drying will occur. With cucumbers in this matter, everything is simple so that the plants do not turn yellow, it is necessary to take into account the fact that the moisture content of the soil before fruiting should be slightly less than during harvesting. As soon as the fruits begin to ripen, the soil needs additional watering so that the soil does not lose moisture. But you also need to consider some watering rules:
- it is forbidden to perform watering with cold water (11-15C), this leads to a sharp and massive fall;
- so that there are more flowers (especially women), during their formation they are not first watered for several days to dry the land, and then they are irrigated;
- excessive watering can cause the formation of harmful bacteria, so irrigation must be done very carefully.
Improper use of mineral fertilizers
The problem may start due to improper fertilizer
Leaves and ovaries turn yellow also due to improper fertilizer, this reason may lie not only in the lack of elements, but in their incorrect combination.
Preparations in which ammonia nitrogen is present are forbidden to combine with drugs in which alkali is present. So ammonium nitrate is unacceptable to mix with ash or tomosclack.
Compatible fertilizers include all organic fertilizing:
- bird droppings;
Among artificial fertilizers are compatible:
- Calcium nitrate phosphoric flour;
- lime fertilizer sodium nitrate;
- potassium chloride superphosphate;
- potassium sulfate urea.
Parthenocarpic varieties are very dependent on the factor of proper feeding, since they have a powerful vegetative and root system, so they need abundant watering, and this can lead to leaching of useful minerals from the ground. If the plants do not receive the necessary elements, then the ovaries dry up and fall off.
The treatment is simple, the gardener needs to feed bushes with mineral fertilizers on time.
Growing any garden culture is hard work, during which all sorts of difficulties can arise. If the gardener aims to get the maximum crop, then he needs to know what problems arise and how to deal with them. Knowing the causes of yellowing and the factors due to which the young ovary of cucumbers dries up, a system of preventive measures can be developed.