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What to do if the leaves of cucumbers in the greenhouse wither, how to process them for treatment

What to do if the leaves of cucumbers in the greenhouse wither, how to process them for treatment


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The answer to the question of why cucumber leaves wither in a greenhouse is not always associated with soil moisture and heat. To prevent crop loss, you need to find out the cause and start taking action.

The main reasons why cucumbers wither in a greenhouse

Climatic conditions do not always allow you to safely grow cucumbers in an open area. Therefore, more and more often, vegetable growers began to install a greenhouse on their site, where, it would seem, all conditions were created. But the greenhouse climate does not always drive away trouble from vegetable crops.

There are several main reasons why leaves on cucumbers can wilt.

  • Cucumber leaves wither in the greenhouse due to non-observance of the distance between the seedlings (as a result, the lashes intertwine, interfere with the flow of air and light to all parts of the plant).
  • Cucumbers can disappear as a result of a lack or excess of moisture.
  • Using cold water to water cucumber beds.
  • Fungal or viral disease.
  • Contact with cucumber leaves of chemicals intended to feed the root system.
  • The constant presence of the lash of cucumbers under the scorching rays of the sun during the day.
  • The reason for the wilting of cucumber leaves is an unfortunate neighborhood in a greenhouse (for example, cucumbers do not get along well with tomatoes, so they need to be planted separately).
  • Cucumbers can die due to improper fertilization or their complete absence.

If the reason why cucumber leaves turn yellow and wither is in the heat, then often they are not harmed by the sun itself, but by the simultaneous presence of other unfavorable factors. If you water cucumbers on a sunny day, then there is a high probability of getting burned. The leaves dry up and fall off. Therefore, you need to water in the morning or in the evening, and after the procedure, be sure to ventilate the room.

For the same reasons listed above, cucumbers in the open field may feel bad. Additionally, unfavorable weather conditions can be noted in the form of cold nights, strong winds, and prolonged rains.

If cucumbers in a polycarbonate greenhouse not only wither, but also turn yellow, then the reasons may be associated with such unfavorable factors as infectious diseases of plants and soil, invasion of pests, excessive watering, and rare ventilation of the room. At the same time, cucumbers can form irregularly shaped, and taste bitter.

Why do cucumbers wither in a greenhouse and what to do

If the leaves of cucumbers turn yellow and wither, you need to check all the seedlings in order to understand the reason, and only after that start solving the problem.

  • In the event that the examination did not reveal traces of pests and infection, but only wilting of the leaves of cucumbers in the greenhouse is observed, you need to water the plant. The water should be warm (about 20 degrees), it is best to settle in a barrel during the day. After watering the cucumbers, it is recommended to loosen the soil. This will improve the supply of oxygen and nutrients to the roots.
  • Cucumbers die at temperatures above 27 degrees. The leaves begin to dry and turn yellow. It is necessary to monitor the temperature regime, ventilate the room, shade the structure and water the beds up to twice a day.

  • Cucumber leaves also wither in the absence of sufficient pollination. If bee-pollinated varieties of cucumbers have been chosen, then the doors of the greenhouse must be opened to provide free access to pollinating insects. You can attract them with sweet solutions. If self-pollinated varieties are planted, then you need to help the plant. To do this, lightly shake the stem with your hand several times a day. You can transfer pollen from male inflorescences to female flowers with a brush.
  • Cucumber seedlings can change their appearance due to a lack of micronutrients in the soil. Cucumber leaves wither and curl as a result of a lack of nitrogen. Foliar treatment with infusion from chicken droppings can compensate for its deficiency; urea feeding is suitable.

  • Leaves also wither due to damage to the root system. They can be damaged while loosening. Nitrogen feeding and hilling of the seedling will help to save the situation.
  • The lower leaves of cucumbers turn yellow and dry as a result of lack of light. The upper leaves, shading the lower row, do not let light through. The problem is not terrible, you just need to pluck those leaves that have dried up.
  • Leaves may dry out due to a lack of potassium, phosphorus or magnesium.

During the period when the whips have withered in the cucumbers in the greenhouse, watering should be done manually. Watering with a thin stream, without pressure, each root. Do not allow moisture to enter the green part of the plant.

If the question arose of how to treat weak plants, you need to turn to the practice of experienced gardeners. Proven drugs that help cucumbers get stronger and recover are: Previkur, Topsin, Bayleton.

Infectious problems

Cucumbers wither as a result of the entry of the causative agent of various diseases into the plant. The most common diseases of cucumbers in the greenhouse are white rot and fusarium.

A disease such as white rot leads to damage to the root system, and the plant loses the ability to eat properly. On cucumbers in the greenhouse, you can see brown spots at the base of the stem. Gradually, the spots spread to the leaves, stem, and the cucumber plantings die. A drug such as Trichodermin helps to fight the disease.

Tracheomycotic wilting of cucumbers most often affects vegetables in greenhouses. Fungi such as fusarium and verticillosis, getting inside the plant, destroy blood vessels and cause the death of the plant.

Fusarium is a fungal disease in which all parts of the plant wither, starting from the crown, and the root part of the stem begins to rot. Dark spots appear on the affected seedlings, the leaves dry and curl. Their treatment is carried out with drugs such as Fitosporin, Heteroauxin, Kornevin, Trichophyte.

Fusarium disease affects all plants in the greenhouse. Therefore, it is recommended to start a fight with him when the first signs appear. It is recommended to initially choose varieties of cucumbers that are resistant to fusarium: Ideal, Caprice, Sir, Ryabinushka.

Most often, cucumber beds are invaded by aphids, whiteflies and spider mites. A soap solution or an infusion of onion peels will help to deal with them. You can use recipes based on wood ash. If cucumbers wither in the greenhouse, what to do in case of mass destruction of the beds? In this case, you will have to treat with insecticides: Aktara, Aktellik.

Preventive actions

Prevention includes the use of both store-bought drugs and formulations made according to folk recipes.

  • Seeds of the selected variety of cucumbers are selected and processed. It is imperative to warm up the seeds. Many experienced gardeners additionally soak them in preparations that stimulate growth and increase immunity.
  • It is recommended to change the topsoil in the greenhouse at least once every two years. Otherwise, it is depleted and lacks nutrients.
  • You should not plant cucumbers on the same plot of land every year.
  • Keep your distance when landing. The distance between seedlings should be at least 45 cm.
  • It is best to mulch the ground. An additional layer of grass, straw, peat will reduce the risk of developing diseases, retain heat and moisture in the soil.
  • It is imperative to carry out weeding from weeds, which can cause diseases and the spread of pests.

As a preventive measure, it is useful to spray the tops with a weak solution of potassium permanganate, and treat the lower leaves with Fitosporin, Trichodermin.

What to do when cucumber leaves wither in a greenhouse, folk recipes

If the leaves of cucumbers turn yellow, you can use folk recipes. They are safe and help get rid of many other problems.

  • For pest control, a pepper formulation can be made. You will need to take 35 g of hot pepper and mix with 200 g of tobacco dust. The mixture is poured with hot water and left to infuse for one day. Then the solution is filtered, soap and wood ash are added.
  • If the cucumbers are sluggish, wood ash will help. It is taken in an amount of 100 g, poured with a bucket of boiling water and insisted for a day. Strain the finished solution and dissolve the soap shavings.

  • Potato tops help get rid of yellowing. You will need 350 g of greens, which are poured with 10 liters of hot water. After 3-4 hours, you can spray the cucumber beds. For better adhesion of the solution to the leaves, dissolve the soap.
  • At the first signs of a fungal disease, a composition with milk whey will help. You need to take 2 liters of the product and stir with water.
  • The disease caused by various pathogens can be removed using a composition in skim milk. Dissolve 20 g of soap shavings in a liter of milk, add 25 drops of iodine and mix with water. It is useful to water the cucumbers with this solution every 10 days until the problem disappears.

As fertilizers, you can use mullein infusion, baking soda solution, urea solution. They will help not only remove yellow, dry leaves, but also enrich the soil with trace elements.


Watch the video: Your Gardening Week Live #7 (November 2022).