General information

Cucumbers on the windowsill: pests and diseases


Cucumbers are grown seedlings on the windowsill, because they do not have time to adapt in the open field and bring a good harvest before the onset of cold weather. At this stage, it is important to track whether seedlings are developing well.

If the seedlings stretched out, then the wrong conditions became the cause: a lack or excess of light. During growth, seedlings should be kept in a cool shade at a maximum temperature of 22 ° C.

There is an easy way to save sprawling seedlings. To do this, you need to fold the stem with an eyelet, press it against the soil and sprinkle it. So growth will slow down, an extensive root system will be formed.

Tip! Seedlings are sometimes drawn out even with proper care. Therefore, gardeners recommend planting seeds in deep cups in order to fill in additional ground if necessary.

Yellowing leaves

The leaves turn yellow for several reasons:

  • improper care
  • pests
  • fungal disease.

The first reason is the most common. In close capacity, an advanced root system will eventually begin to experience nutrient deficiencies. The soil should be enough, so seedlings with yellow leaves are resettled. Transplanting at the stage of two true leaves is a mandatory procedure. Another solution to the problem of yellowness is to apply nitrogen fertilizer to the soil.

Another cause of yellowness is excess sunlight. In this case, the stains on the leaf plates are burns. Do not forget pritenyat capacity with seedlings.

If there is a sharp withering of cucumber seedlings, the most likely cause is a soil fungus. It penetrates the root system, destroying it. First, the plant ceases to grow. Then the upper part fades, and behind it all shoots. You need to dig up the roots and see: if they have brown rings - this is definitely a fungus.

Sharp withering is of two types:

  1. Fusarium. It is characterized by a temperature content above + 25-28 ° C and dry air.
  2. Verticillary occurs due to a temperature of 16-20 ° C.

When transplanted into open ground, cucumbers with diseased roots are removed. The soil is cleaned from the remnants of last year's vegetation and disinfected with a fungicide.

And how do you fight the most common diseases of cucumbers? Tell us what secrets and tricks are known to you, and how do you succeed in this difficult task?

Fungal diseases of cucumbers and their treatment

Video story about the treatment of cucumber disease

The most common and harmful diseases cause sporiferous imperfect fungi. Cucumber has very delicate integumentary tissues, therefore it is easily affected by various types of this infection.

To prevent contamination from plant debris, cucumber can not be grown two years in a row in one place.Root rot. They cause fungi that are everywhere in the soil, feeding on inanimate plant residues, healthy seedlings do not affect.

Arise only at the time of weakening of plants, mainly due to the low temperature of the soil below +16 degrees. The root loses its live root hairs, becomes covered with brown bloom, leaves and stem fade. When you buy seeds, you can see that some of them are already processed and painted in a bright signal color.

This is done to destroy part of the infection on the surface of the seed, and to give a noticeable color, which makes sowing easier as it becomes more visible. Usually covered with a shell containing fungicide thiram, which suppresses fungi that cause root rot. If the disease began to manifest, it is necessary to raise the temperature of the soil, pouring warm water with the addition of potassium permanganate to a slightly pink color.

Stems, lowering from a support, are laid on the ground and sprinkled with soil to form additional roots.White rot or sclerotinia.

Highly infectious dangerous disease, which manifests itself in the form of white flakes with black dots on all parts of the plant. Mucous soft spots appear on them. Elevated parts wither and die within 3-5 days.

Effective drugs at the moment does not exist. When this cucumber disease appears in the greenhouse, it is quarantined and all plant residues are destroyed and the soil is treated with steam or its replacement.Anthracnose. Ascohitosis. Cladosporiosis

These fungal diseases have similar symptoms, mostly brown spots appear on cucumbers. The affected leaf tissue is chipped and holes appear. Fruits appear brown on the fruits. The plant over time loses leaves and dies.

Spores of these fungi overwinter on plant debris and are transferred from infected plants to healthy ones by wind. These diseases have an incubation period and begin to manifest at 3-7 days from the moment of infection. To combat diseases, preventive treatments with one of the copper preparations should be carried out: 1% Bordeaux mixture, abigac-peak, copper oxychloride.

Stop the use of these fungicides for 30 days before harvest.Powdery mildew. Fungal disease that manifests itself at high humidity, often after prolonged precipitation.

The disease manifests itself 3-5 days after infection with spores. A white patina of cucumbers appears only on the top of the leaves.

They gradually shrivel and then dry, the seedlings stop growing and die. To combat this disease, they use drugs containing sulfur, for example, Quadris or Colloidal sulfur. The treatment is carried out prophylactically every 2 weeks and stopped 14 days before harvesting.

Perinospora or downy mildew of cucumbers. The most harmful disease, as the defeat goes at lightning speed and there are no sufficiently effective means of struggle. Spores of this fungus have flagella that pierce even thin aluminum foil.

Drip-liquid moisture is necessary for infection. The optimal infection conditions are +18 degrees and 100% relative humidity.

Peronosporosis of cucumbers manifests itself in the form of a whitish plaque with a violet tinge on both sides of the leaf, which is a hallmark of powdery mildew. Fruits are not fully colored and tasteless.

The leaves quickly turn brown, the crops completely perish. Until recently, it was only possible to grow cucumbers of early ripening. Currently, the cultivation of resistant or tolerant varieties allows you to get a crop, even in open ground.

In greenhouses, cucumbers are less susceptible to the disease during prophylactic treatment with copper preparations and alternation of drugs of various chemical groups, for example, Strobe, Ridomil Gold, Bravo. Treatments are stopped 30 days before the harvest. We hope that the information provided in the article will allow us to avoid many diseases of cucumbers and get a high yield.

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The main causes of diseases of home cucumbers

Although all diseases arise and develop for various reasons, they have the same source. Due to the fact that your cultures develop and are for a long time in the same soil, it gradually loses its properties, even despite the abundant feeding. Also in such conditions creates its own microclimate. These factors, together with the particular causes of certain diseases, help the latter to actively arise on your plants.

Diseases of seedlings and their treatment

The first difficulties arise even when growing seedlings - almost everyone faces this. In this section there is a description of the disease of cucumber seedlings on the windowsill and their treatment with a photo of the diseases themselves. The most commonplace problems are the yellowing and stretching of the seedlings. The latter arises due to excess heat or insufficient light. Seedlings should be kept in a cool place, at a temperature not higher than 22 ° C.

The yellowness of seedlings occurs for several reasons. When grown in cups, the roots become cramped, they lack nutrition. In this case, simply transplant seedlings.

If there is enough space, the problem may still be a lack of nitrogen, if fertilizers such as Azogran or Vermistim are applied. Another reason may be too long content in cups or other vases. Cucumbers need to be transplanted to a permanent place in time, otherwise you can harm them.

If your plant has yellow seed leaves, this indicates a lack of lighting. Just change the location and everything will be fine.

In addition to such simple diseases, there are more terrible enemies. Among the most frequent are root rot, powdery mildew, fusarium wilt, pernoporosis and so on. One of the insidious diseases of cucumber is the black leg.

Diseases of adult bushes

A frequent cause of diseases of adult bushes of various cultures is a violation of planting and caring for seedlings. Even if your seedlings are healthy, the consequences of the wrong conditions can manifest themselves in the future in the form of diseases.

If your bushes are in excessively humid conditions, they lack fresh air, they are subject to temperature fluctuations or are too thickly planted. - all this may entail a number of root and root diseases. As well as seedlings, adult plants can attack various viruses and fungi, one of which is powdery mildew.

Slerinia (white rot)

White rot appears as white patches that darken gradually. The rest of the cucumbers are covered with white bloom, becoming wet and slimy. Next is the process of decay.

The cause is sclerotia. They hibernate in the soil and multiply rapidly in conditions of excessive moisture. To reanimate the plants, remove the diseased areas and process the remaining sections with charcoal or lime. If sclerotinia struck the bushes deeply, then simply remove them completely. The next disease is very insidious. It develops inside the plant and only after it manifests itself.


Perogosporoz is fungal in nature and can develop from the moment of sowing, and manifest itself only with the appearance of fruits. Disease occurs due to infected seeds or plant residues affected by fungal mycelium.

You can find out the disease by Shrovetide on the foliage Over time, the reverse side of the leaves will be covered with gray bloom. When the spots grow and darken, it dries. The fungus is able to destroy your bushes in a very short time.

Medyanka or anthranosis

Medyanka or anthranosis is known for not only the plants, but also the fruits themselves are ill. You can see it on the brown spots on the leaves. Over time, they become more and turn black. Then the plot dries out and crumbles, as if it was burned with something. The spots on the affected fruit can go down to 5 mm.

What to do for prevention?

For the prevention of root rot, you can simply use pure or deliberately pickled seeds. The soil in which you will plant, must be prepared and not contaminated.

From the drugs you can use "Fitosporin-M". It is suitable for treatment and prevention. For the prevention of peronosporaz pay attention to the seeds. They need to be pickled or heated. It is also possible to use varieties that are known to be resistant to it.

In cases of infection, spray means “Kuprostat” or “MC”. If you adhere to all temperature standards, regularly loosen the soil, your cucumbers will be more resistant to diseases. In preventing fungal diseases, it is helpful to spray the infusion of marigolds.