Cucumbers - one of the most common vegetable crops, which can be found at their summer cottage. In the process of growing gardeners may encounter some problems, especially with twisting of leaves. This phenomenon may indicate a vitamin deficiency, viral diseases, pests. Let's look at these reasons in more detail.
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insufficient irrigation
Often twisting of leaves - this is the result of inadequate care culture. If you do not pour it in time, they will begin to dry and curl up into tubes. Easy to solve the problem: it is necessary to restore water balance in the soil. Timely watering cucumbers in greenhouses - the key to the proper development of the plant. Moisten the soil need a minimum of 10 cm depth.
Another factor that can affect the leaf rolling - is excessive dryness of the air. Solve the problem by spraying the bushes and the inside of the greenhouse. The procedure is preferably carried out in the morning to the evening drops of water dried up. The optimum rate of air humidity in the greenhouse for cucumber is 80-90%.
Deficiency of nutrients
Cucumber leaves may begin to deform due to a lack of nutrients. If it was discovered that they had lost the brightness and curled inside, most likely, the plant experiences a nitrogen deficiency. To enhance the growth of leaf mass, a culture must energize urea, ammonium nitrate, or use any other fertilizer, which is based on nitrogen.
Leaf rolling upward indicates that the soil needs a feeding potassium. In this case the soil is necessary to make the potassium salt solution (3 tbsp. l. 10 liters of water).
Scorch or subcooling
Cucumbers do not tolerate rapid changes in temperature. Cooling leads to the fact that their leaves begin to turn yellow and shrivel. The same effects can occur in the heat.
If the cultivation of cucumbers produced in the balcony, windowsill or a glass greenhouse, the seedlings should be planted so that the leaves are not against the glass. The thing is that it is rapidly heated and cooled, and this can harm the young plants.
pest infestation
For one of the most common causes deformation of leaves could be considered an invasion of pests. Detect them easily: you need only to examine the back of the leaves. If they obsela aphids or spider mites, they can be seen with the naked eye.
If pests are detected, you must immediately begin to fight with them, because they slow down the development of the plant and can be carriers of viral diseases.
For destruction of aphids required insecticide treatments ( "Akhtar", "Arriva", "Barguzin", "Decis", "Intal Vir 'etc.). Destroy mite under effect akartsidam ( "aktellik", "Aktofit", "Fitoverm").
Most products designed for pest control, are dangerous to human health, so they must be used before the formation of ovaries. Otherwise fruits absorb a chemical substance.
Milder differ folk remedies. Cope with cucumber garlic tincture will help pests. To prepare it to grind 500 grams of garlic, pour 3 liters of water and put in a dark place for 5 days.
The defeat of mildew
To prevent occurrence of powdery mildew on vegetables solve. This disease makes itself felt in the middle of summer. If time does not recognize it, the leaves begin to warp and twist.
Trigger the development of powdery mildew is insufficient ventilation of greenhouses or other areas where grown cucumbers, watering with cold water, abrupt changes of temperature, condensed landings.
About the disease shows a whitish plaque. To combat this disease recommended treatment plant with a 1% solution of liquid Bordeaux.
root rot
This fungal disease is root rot, leading to the fact that cucumber leaves curl and begin to lose their bright color. Recognize this attack can be one characteristic feature - the lower leaves begin to turn yellow and dry, and the stem near the ground becomes brown hue.
The disease can be prevented if you follow the preventive measures:
- Conduct soil disinfection using a low-concentration solution of potassium permanganate.
- Do not water the plants with cold water.
- Regularly ventilate the greenhouse, preventing air from overheating.
- Upon detection of the first signs of illness to carry out the processing plant preparation "Trihodermin".
ammonia burns
In some cases, twisting the cucumber leaves can be caused by burns caused by ammonia. This happens when a plant was introduced in the form of fertilizing manure nepereprevshego. Excess dosage of ammonium nitrate may also provoke a burn.
Possible to rectify the situation. To do this, remove the roots fertilization and abundant water the plant to wash the ammonia out of the ground.
virus infection
Viral diseases often entail twisting of leaves. In this case you should immediately dig up the plant and burn it, otherwise the virus spread to the dacha, and has struck much of the crop.
If you want to collect a bountiful harvest of cucumbers, you need to ensure that appropriate conditions of vegetable crops. Twisting can be caused by different reasons, so their condition must be constantly monitored.
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