Having found diseased plants in the garden, it is necessary first to find out why the leaves of cucumbers curl in the greenhouse, and only after that take the necessary measures. Unreasoned actions can lead to even greater problems and jeopardize the fate of the crop.
Leaves - Problem Indicator
Cucumbers are a favorite vegetable crop of many gardeners, even despite certain difficulties in their cultivation. These vegetables are very demanding on the temperature conditions, air humidity, the number of feedings, and if they do not provide decent conditions, then getting a good harvest will be very problematic.
Most often, the culture is grown in a greenhouse, but in these conditions it is difficult to protect it from various diseases. Even experienced vegetable growers sometimes find it difficult to immediately explain the cause of a particular problem. For example, why leaves of plants change their color and curl like the pages of an old book.
The reasons for the change in the appearance of the sheet plate can be several. This, most likely, will not lead to the death of the plant, but will significantly affect the yield. Therefore, it is necessary to find out the factor contributing to the occurrence of the problem and try to fix it quickly.
Most often, the twisting of the leaves of cucumbers is the reaction of the plant to the lack of the main nutrients in the soil: nitrogen, magnesium, calcium, sulfur. Lack of nutrition for vegetable crops can occur as a result of improper preparation of the soil before planting or insufficient use of complex fertilizers for dressing during the growing season.Attention! Cucumber leaves can curl with insufficient air humidity and soil.
In such conditions, the evaporation of moisture from their surface is activated. And in order to preserve it as much as possible, the plant reduces the area of the leaf plate, twisting. Often this picture can be observed on dry hot days.
Such changes may occur with increased humidity, especially if there is poor ventilation in the greenhouse.
The leaves of cucumbers growing in the greenhouse may also change as a result of infection with viral diseases or parasites. When attacking aphids, wireworms or other pests, the leaf on the affected bush will curl.
In this way, the plant signals the vegetable grower to take urgent measures to eliminate the pest.
Methods of struggle
If the cucumbers in the greenhouse lack moisture, then they need to be urgently watered.
But before that it is recommended to loosen the top layer of soil. Watering is best done in the morning and evening with small amounts of warm water. If necessary, during this period, you can make complex fertilizers, mixed in a liquid. This will eliminate nutrient deficiencies. And also it is possible to conduct foliar feeding, splashing the plants with a specially prepared mixture of water with nutrients or biostimulants. With this method of fertilizing their assimilation occurs as intensely as possible.
However, at this point you need to be extremely attentive and not to hold such events on hot days. Otherwise, the plants may get sunburns and there is a risk of finding the next day their leaves twisted and yellowed.
After watering, wetted beds are recommended to be mulched. This will give the opportunity to retain the necessary moisture in the greenhouse, minimizing the percentage of evaporation.
If parasite colonies are found on greenhouse plantings, it is necessary to treat the affected areas with an effective means. Good results can be obtained by spraying the bushes with a solution of ordinary soap. For greater efficiency, ground red pepper or mustard powder is added to it.
Quite popular among gardeners is a mixture of 100 g of soap and 100 g of wood ash, dissolved in 12 liters of water.
With significant contamination, it may be necessary to use more serious insecticidal preparations, which can always be purchased at specialized outlets.