Cucumbers turn yellow in the greenhouse. What is the reason?
Growing cucumbers in a closed ground allowsget an early harvest. After all, how nice to eat a salad of fresh cucumbers, when the snow is still on the street. Early cucumber is not easy to grow. Often happens: a healthy plant starts to ache sharply, and the main symptom of this phenomenon is the yellowing of leaves and fruits. Why do cucumbers turn yellow in the greenhouse and what should be done to prevent this process? Let's try to understand this question.
The violation of growing technology isthe main reason that cucumbers turn yellow. In the greenhouse should be created a favorable microclimate for the growth and development of bushes: sufficient lighting, stable air and soil temperature, average air humidity, regular airing of the greenhouse. The water regime must also be strictly observed: the drying of the soil instantly leads to wilting and yellowing of the plant.
If the soil in which the bush grows is poor inphosphorus, potassium and nitrogen trace elements, this also leads to the yellowing of the fruits of cucumbers. To prevent this problem, at the beginning of each season, a number of fertilizers must be introduced into the soil. Modern industry produces complex preparations for feeding cucumber, which includes all the necessary micronutrients. Applying fertilizers, you need to strictly adhere to the norms, since their surplus can also be detrimental to the vital activity of plants.
In hybrid varieties of greenhouse cucumbers,tie up to 150 ovaries. This leads to overload of the plant - this can also be the reason that cucumbers turn yellow. In the greenhouse, to obtain quality fruits on one bush, it is enough to leave 23-25 ovaries, and the rest must be removed.
For obtaining healthy cucumber bushesit is recommended to change their growth places annually. Constant growing of a plant in the same greenhouse leads to the depletion of the soil, infection of its infections, causing yellow cucumbers. Fruits under such growth conditions with each season is tied less, bushes are more often affected, yields are reduced to a minimum.
Insects-pests - provokers of cucumber bush disease
Aphids, spider mite, sprout fly, cucumbermosquito - these are insects that feed on juice, shoots and fruits of cucumber. The viability of these pests on the bushes and leads to the fact that the cucumbers turn yellow in the greenhouse, wither and die. These insects are multiplying very quickly. Appearing on one plant, just a few days they hit all the bushes in the greenhouse. To avoid this problem, it is necessary to conduct regular inspection of bushes and, at the first detection of harmful insects, treat plants and the top layer of soil with special preparations.
