Disease of cucumbers in the greenhouse, photos and treatment

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2020-07-03 03:41:21

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When growing cucumbers in greenhouses can develop a variety of diseases. Leads to it not only the growing crops in the same greenhouse, but improper disinfection, lack of fertilizer. To know how to handle diseases of cucumbers in the greenhouse, should be able to identify the cause of the disease. It does not need to do any tests enough to know the symptoms and what the drugs treat.

diseases of cucumbers in greenhouses

Aphids

Bocheva aphids parasitic on the inner side of the leaves, the flowers, the ovaries. It can cause puckering and twisting of the fruit. Usually cucumbers are damaged by this pest in the second part of the summer. Pest develops quickly.

At the Beginning of this disease of cucumbers in the greenhouse, the leaves acquire a yellowish tint. A few days aphids reproduce up to such amount that can damage not only the leaves but also the flowers and fruit.

Disease of cucumbers

To get rid of aphids, it is necessary to carry out the weeding on the plot of land, handle trees, shrubs, destroy garden ants.

Get Rid of the disease of cucumbers in the greenhouse you can use folk remedies or treating plants by special agents of the aphids.

Among the folk remedies well-proven tincture of red pepper. For its preparation is taken thirty grams of Cayenne pepper, a glass of tobacco. All zaparivat a bucket of boiling water and insist day. After the infusion is filtered and added to a tablespoon of green soap and a glass of wood ash. Consumption of the drug – liter per square meter. Spray capsicum tincture every day for weeks.

Some gardeners are struggling with aphids with a solution of soap and ash. To prepare it you need two cups of ash dissolved in a bucket of water and add a spoonful of soap. The composition is left for a day. The substance is filtered. Spraying is carried out every day for ten days.

To get rid of the disease of cucumbers in the greenhouse help chemicals. From aphids, you can use the ‘Malathion”, “Fufanon”, “the Akhtar”, “Arrow” or other means available in the garden store. To use any drugs necessary according to the accompanying instructions.

Whiteflies

Pests and diseases of cucumbers in the greenhouse can completely destroy the crop. One of the pests that feed on the SAP of plants is the greenhouse whitefly. It is not always possible to detect on the plant, but about its presence say sticky white marks, blackening of the leaves and drying.

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Whiteflies can enter the greenhouse not only with weeds growing next to it, but also with neighboring sites. Pest flies through the door, vents, sits on the plant and multiplies rapidly, destroying the vegetables.

To combat the whitefly is difficult, it is easier to take preventive measures. To this end, vents are covered with gauze, folded in several layers. In most greenhouse hang pieces of plywood, painted yellow and smeared with rosin powder with honey or vaseline. These traps attract whitefly: insects fly to the lure, stick on the Board and die.

Definitely need to loosen the ground to a depth of not less than three inches, to add humus or peat.

Powdery mildew on cucumbers

Powdery mildew

Presented at the photo of cucumber diseases in the greenhouse may not always be true. Powdery mildew – it is a disease which is of two types: true and false. And then, and more – it is a disease, but each of them has its own characteristics and different methods of treatment.

Downy mildew affects the plant at different stages of growth. It occurs both in open field and in greenhouse. Moreover, the infection is kept in one place for up to six years.

The Symptoms of the disease is the presence of oily stains green. For two weeks they increase in size, becoming brown in color, as if the plant got burned. Then, the sheet dries quickly, just a couple of days. On this phenomenon, saying that “fell sour rain”. In fact, the disease occurs when sudden changes in day and night temperatures, for example, day 25, and at night - +10. Downy mildew can occur when watering with cold water.

Diseases of cucumbers in the greenhouse and their treatment influence the quantity and quality of the crop. To deal with mildew, you need to stop watering for a week, ventilate the greenhouse. As soon as the moisture level will decrease, spend processing of plants with special preparations, such as "Topaz”, “Axioma”. Diluted funds according to the instructions.

During the processing of a greenhouse, it is important to spray not only the plants themselves, but also the greenhouse, the soil under the cucumbers. After processing the hot-house air.

True or true powdery mildew is manifested by formation of white Deposit on the leaves. The disease spreads rapidly, the leaves look as if they had been sprinkled with flour. Then the plants wither.

The Disease is caused due to irrigation with cold water, the sudden temperature drop. Can infect cucumbers weeds, insects, visited the sick flower and flew into the greenhouse.

At the first sign of the diseasecucumbers in the greenhouse, treatment and prevention of powdery mildew is carried out by the following means:

  1. A Solution of mullein. For it will need to take a bucket of warm water and a liter of liquid mullein.
  2. A tablespoon of urea.
  3. Stir Everything thoroughly. Solution treated plants in warm weather. The leaves were sprayed from below and from above.

You Can use sulfur for crop dusting. To do this, take the sulphur and put it in the pouch. In warm weather, sulfur scattered on the plants.

There are special preparations from powdery mildew, for example, "Topaz”, “Barrier” and other.

Olive leaf spot

Olive Brown mottling or ant

You Can see in Internet a lot of photos of diseases of cucumbers in the greenhouse, where stems and fruits are covered by a rounded ulcers olive green. They eyes are brown, grow. The leaves appear the hollows, which dry up, destroying leaf plate. This disease – the ant – a fungal infection.

The Disease occurs in cool weather with sharp temperature changes. In the hot summer olive spotting can occur at the end of the growing season. The infection spreads with rain, wind, water. The fungus for a long time remains on the plant and in the soil.

Trouble did not arise, it is necessary to observe the crop rotation and do not return cucumbers at the same place for four years. It is also important to ventilate the glasshouse in time to remove from the garden all of the plant residues, do not water plants with cold water.

At the first sign of ant, you should stop watering for five days. If the average daily temperature falls below eighteen degrees, you need to raise it to at least twenty degrees.

Be Sure to spend processing plants percentage of one percent Bordeaux liquid, of oxychloride of copper, ‘Okahoma”.

White rot or sclerotia

The Fight against diseases of cucumbers in the greenhouse is not only ventilation and monitor the temperature, but also timely treatment plants. It helps to get rid of a variety of viral, fungal infections. One of the most dangerous diseases are white rot. In this disease, fruits, stems, leaves are covered with a solid white coating. The disease can be confused with powdery mildew, but the difference is that the process involved the fruits – they become white.

Sclerotia appears due to fungi that overwinter in the soil and is rapidly spreading across the earth and the humid air.

Correct treatment of cucumber diseases in greenhouse and prevention will help to save the harvest. To get rid of white-rot, you must remove all diseased parts of the plant after their charcoal or lime. If the fungus has spread, it is necessary to remove the whole plant.

Then the plants are fertilized with a nutrient solution, taking ten grams of urea, one gram of copper sulfate and sulfate sulfur. All of it diluted in a bucket of water. The solution poured over the cucumbers.

Gray mold

When Botrytis stems, leaves and flowers, covered with a watery brown indistinct spots. They quickly merge with each other, covered with a grayish bloom. This ailment refers to a bacterial, capable of hitting all parts of the plant.

The Main cause of a disease of cucumbers – waterlogging and low temperatures. This kind of disease can be prevented. For this should not zagadivat landing, and to observe the rules of crop rotation. From greenhouses, where they grow cucumbers, you must remove all the remains of plants and treat the greenhouses and processing plants in time as a preventive measure.

If the disease has manifested itself, should be treated with fungicide plants. This can be “Rural’, ‘Balatonon”, “Home”. All affected parts of the plant are removed.

Root rot

Pests and Diseases of cucumbers in greenhouses can be preserved for many years in the ground. Bacteria, viruses, larvae of pests, fungi overwinter well in the soil, and the creation of favorable conditions, aktiviziruyutsya, destroying the plants.

With root rot the leaves begin to fade, gradually they dry. If you pull out a Bush and look at its roots, we see that they are painted in red color, they look rotten. These signs indicate the root gyle – the most dangerous and widespread disease.

Once discovered the disease, the first thing to do – to stimulate the formation of new roots. To do this, around the Bush it is necessary to raise the ground level by no less than five centimeters. This option will allow you to put cucumbers new roots. You can trim the leaves from the bottom part and put a ring whip. In a week Bush will periyarensis. During this procedure, the Bush is watered not the roots and only with lukewarm water.

If the plant is already dead, then it is removed from the greenhouse with the soil. In the resulting hole poured fresh soil. The whole instrument is treated.

Anthracnose of cucumbers

Anthracnose

Timely treatment of diseases of cucumbers in the greenhouse can save the bushes from Copperhead or Anthracnose. This disease appears on leaves, stems brown spots. Leaf blades start to wither, the fruits are covered by a wet girl.

The Cause of the illness most often are infected seeds harvested from diseased plants. Alsoto cause disease could be a fungus that persists in the upper layer of soil in plant residues. When watering with cold water, sudden changes in temperature contribute to the rapid spread of the disease in the greenhouse.

Trouble did not arise, it is necessary to observe a rotation, and also time to remove any plants from the garden, treat the soil.

If the plant is sick, it is necessary to conduct a treatment of Bordeaux mixture (1 %). All affected parts of the plant are removed, sprinkled with lime.

Disease of cucumbers, the lack of nitrogen

The Shortage and excess of nitrogen

To get a good harvest, it is important not only to know and see the manifestation of the disease. Having studied the photo of the cucumber diseases, treatment in the greenhouse will help to protect the harvest from destruction.

One of the most common problems of the plants is yellowing of leaves. For each type of minerals has its own signs of yellowing. If changes the tone of the top sheet, it indicates a lack of nitrogen. These plants form small fruits in small quantity. Plants do not develop.

The glut of nitrogen the leaves become a dark green hue. Old and medium leaves to bend, merge, appears a brownish tint. Fruit shrinking, they accumulate nitrates. Massive doses of nitrogen can kill a plant within days.

To Solve the problem with the lack of nitrogen just. To do this, the bushes are watered with an infusion of mullein, or use a solution of nitrate (table spoon on a water bucket).

When excess nitrogen must be washed out of the soil. To do this, every day spend copious irrigation, and before sunset, is carried out foliar application of two percent of calcium nitrate.

Calcium

For the normal growth of cucumbers need calcium. Its abundance Bush becomes brittle, hard. With a deficiency of the leaves appear bright stripes. Over time, they expand, causing wilting of leaves and dieback. Inflorescences observed on the rot. It applies to fruits, stems, roots.

To cope with the problem, it is necessary to conduct a fertilizer with calcium.

Phosphorus

When phosphorus deficiency occurs on the leaves, yellowing, necrotic spots are formed, and then, falling leaves. The plant begins to age rapidly, impaired absorption of potassium.

The deficit of the plant ceases to grow, the ovary and the flowers fall. To solve this problem, you need to water the plants phosphorus-potassium fertilizer. It is diluted according to the instructions.

Lack of power

Iron

Young leaves you can see the lack of iron. It is manifested by lightening the top of the cucumber. In the lamina the veins become whitish, slowing growth and flowering. To resolve the cause of the death of the plant, you need to make the root of the solution of complex fertilizers. It may be vermicompost or infusion of mullein.

Manganese

For the synthesis of chlorophyll, plants need manganese. He takes part in a number of oxidation processes occurring in the cucumber.

With an excess of manganese the soil begins to turn sour. This leads to a decrease of the chlorophyll concentration begins chlorosis between veins on older leaves, then the new one. Leaf blades are covered with brown necrotic spots.

When lack of manganese on the sheet formed light dot stains on the top. To solve the problem of manganese deficiency should conduct a fertilizer or a solution of manganese (0.3 mg per liter of water) or a solution of complex fertilizer, for example, vermicompost.

There are other types of deficiencies of trace elements, manifested by change in color of the leaf, change the shape and size of fruits, fall inflorescence and other manifestations. To avoid such problems, it is important to once every two weeks fertilizer plant complex fertilizers.

Disease of cucumbers

To reduce the likelihood of disease should be planted in the greenhouse varieties of cucumbers resistant to diseases. Such plants rarely get sick, give a higher yield.

Cucumbers resistant to diseases in greenhouses rarely suffer from rot, powdery mildew and other diseases. To obtain from them a good harvest, it is necessary to conduct timely feeding and to monitor the microclimate in the greenhouse.


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ZH: https://www.tostpost.com/zh/business/39795-disease-of-cucumbers-in-the-greenhouse-photos-and-treatment.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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