Each beginner and experienced gardener must have planted at least a couple of beds of such tasty and healthy vegetables as cucumbers. The vegetable contains many B and C vitamins, as well as a sufficient amount of minerals such as calcium, phosphorus, potassium, iron and magnesium. Cucumbers are an integral part of our diet in raw, pickled and salted form. Growing them is quite simple, but you need to be prepared for unpleasant surprises, namely, the plant is susceptible to such a common disease as peronosporosis.

What is dangerous and where does it come from

Peronosporosis is a fungal disease that affects the foliage and stems of the plant. Downy mildew can kill a plant in the shortest possible time or significantly reduce its yield.
The best environment for harmful spores is moisture, which is why plants start to get sick most often after rain or excessive watering. Air temperature also plays an important role: if at night after rain the thermometer falls below 9 degrees Celsius, plants automatically fall into the risk group, since it is in such weather that numerous species of pseudofungi from the Peronosporaceae family progress.

Another reason for the appearance of downy mildew can be too alkaline soil. Fungal diseases are characterized by increased winter hardiness and are able to remain viable in soil and seeds for up to 6 years.

Signs of appearance

You will immediately understand that the plant is sick: yellow or brown spots will appear on the top of the foliage. Soon the lower part of the leaf is also affected, which is covered with a purple-gray bloom. The disease progresses incredibly quickly, the leaves turn yellow and dry. After 4-5 days, only stems can remain from the plant. Naturally, this contributes to poor ovary or slower fruit growth. Cucumbers affected by the fungus lose their taste.

Important! The disease spreads very quickly and can damage other crops.–pests that can spread spores, such as aphids and whiteflies, help her in this.

Most often, the disease affects plants in the phase of formation or ripening of fruits, it all depends on the time of planting. At the same time, harmful spores can safely remain in the soil, and the disease will be initiated under conditions that are comfortable for them. It is believed that the fungus can cause the most harm to greenhouse crops.

Prevention

First of all, disease-resistant varieties should be preferred. You also need to competently treat sowing: the seeds must be processed before planting, for example, in a solution of potassium permanganate. It is better to plant early varieties in order to prevent peronosporosis spores from developing before the crop ripens.
Experts do not recommend planting cucumbers in the same place every year - change the location of the beds every season, and this will reduce the risk of infection. At the end of the growing season, you need to cut the stems with leaves and burn. If the crop is grown in greenhouse conditions, then, in addition to removing plant residues, it is necessary to remove the topsoil and disinfect it.

Agrotechnical methods of struggle

First of all, the location of the beds plays a role. Too wet areas and neighborhoods with buildings should be avoided in places where water can accumulate, or drops can fall from the roof. It is necessary to make it a rule to treat the seeds before planting. One of the effective methods is the treatment of planting material with hot water (50-55 ° C).
Seeds are soaked for 10-15 minutes, after which you can start planting. You can not overmoisten the plants, watering should be timely, but moderate. Regular soil fertilizing should not be neglected: if cucumbers receive enough nutrients, the risk of downy mildew is significantly reduced. Preventive spraying of young plants is welcome, which are widely represented on the market.

Important! When growing cucumbers in greenhouses, it is necessary to constantly control the humidity in the room. As soon as specks appear on the foliage, you should hastily remove it so that there are no petioles left.

The phased implementation of preventive measures does not guarantee 100%, but significantly reduces the chances of contracting fungal diseases.

Active wrestling

If it was not possible to prevent peronosporosis of cucumbers, treatment should be started immediately. The method of struggle depends on the neglect of the disease and your preferences.
In order to defeat the fungus, first of all, it is necessary to remove its foci - parts of the plant that are already damaged, and immediately burn them. After that, you can start therapy.

Chemicals

Fungicides are considered the most effective chemical agents in the fight against downy mildew. These substances are used both to fight the fungus and to treat the seeds. At an early stage of plant disease, 0.5% solutions of Bordeaux mixture, Ridomil, Kurzat and Oxychoma are used.

Spray both the affected plant and the soil around it. It is necessary to use such preparations for downy mildew on cucumbers with caution, not forgetting their high toxicity and the danger of such control measures for humans and animals.

Did you know? The thorns on the fruits of the cucumber are needed in order to get rid of excess moisture.

Folk remedies

If you prefer safer folk methods of fighting the fungus, then in this case there are an incredible number of different ways. It is believed that ordinary soda is very effective against downy mildew on cucumbers.

To prepare a treatment solution, you will need 30 g of soda, 5 liters of hot water and 5-10 ml of liquid soap. The ingredients are thoroughly mixed until completely dissolved, then the mixture is allowed to cool. After that, the soil and plants should be sprayed. In order to defeat the fungus, you will need at least 3 such procedures. Two sprays are carried out in a row, and the third is carried out after 7 days to consolidate the result.

For the treatment of plants, a mixture of iodine and milk is used. To do this, 10-12 drops of iodine must be dissolved in one liter of milk (fat content does not matter) and diluted with 10 liters of water. Then spray the plants with a spray bottle. Able to defeat harmful fungi and a weak solution of potassium permanganate. 1-2 g of the substance is dissolved in 10 liters of water and the plants are sprayed.

Diseases of cucumbers are especially active in the second part of the summer period, which is associated with the occurrence of cold pre-morning dews. Some of them attack plantings at the very beginning of the growing season. One of the most dangerous fungal diseases, which can provoke a large loss of yield, is called powdery mildew on cucumbers. How to recognize the disease and start taking action, what are the effective methods of prevention, read our article.

What is it

Favorable factors for the spread of the virus are warm and damp weather conditions. 3–4 days after heavy rainfall, outbreaks of powdery mildew can already be observed on cucumbers. She prefers temperatures in the range of 16–22 degrees and a high degree of humidity. Spore formation also requires an abundance of light. A decrease in the immunity of vegetable crops to pathogenic effects is facilitated by sharp changes in day and night air temperatures.

The causative agents of the virus often remain to live in last year's plant debris that overwintered on the site.

signs

Infection of plantings with ashpels is facilitated by certain plant conditions:

• cool and damp weather;
• thickened in excess of the landing rate;
• high nitrogen content in the soil structure;
• excessive drying and subsequent flooding of the earth;
• watering the site at a time when the topsoil is still quite wet.

The hallmark of the disease is a white fluffy coating on the surface of the foliage. The first signs of damage to cucumbers by a spore-bearing fungus are round whitish spots or reddish light ones. First they can be seen on the top of the sheet, and later on the bottom. Over time, they populate all green areas, up to shoots and roots. Some whips in the event of a severe defeat are able to dry out. The leaves become twisted, have a loose surface. Plants are weakened, there is an acute lack of oxygen, which often provokes their death.

Very favorable conditions for the appearance of an ashtray are inside the greenhouse. There, the air humidity can go off scale up to 80% and there is drip moisture. The first signs of the disease can be observed near the open windows. Often it is possible to see the disease on the foliage of cucumbers, less often it is deployed on the cotyledons. The infection spreads from leaves and shoots located close to the soil surface. Fruits infected with the virus are prone to cracking and rotting.

Video "Signs of powdery mildew on greenhouse cucumbers"

See what greenhouse cucumbers look like, the leaves of which are affected by powdery mildew.

How to fight

As soon as you notice the first signs of the disease, you should immediately take action. Before starting the treatment of plants, it is necessary to exclude any types of spraying, stop fertilizing, improve the degree of illumination of plantings, thin them out and remove old, as well as weakened leaves, cut off flower stalks. After such manipulations, it will be possible to fight effectively not only with the mycelium, but also with the spores of the fungus.

Modern gardeners and gardeners often use chemicals to combat fungal infection:

• Topaz, which is used by many to fight the virus, is a popular systemic drug, the active ingredient of which is penconazole. It is used for treatment at the rate of 1 ampoule of funds per 10 liters of water. Spray should be freshly prepared solution. The frequency of treatments is every 2 weeks. The drug in the process of treating plantings is moderately dangerous for human and animal health.
• Tilt CE for plant treatment with the active ingredient propiconazole is offered in a convenient emulsion form. It tends to suppress the formation of spores. The effectiveness of the drug enhances the high ambient temperature. The agent quickly penetrates into the tissues of the plant. A solution to combat the disease is prepared at the rate of 0.4 - 0.5 ml of the drug per 1 liter of water. The protective effect shows a few hours after treatment and lasts more than 2 weeks. The product is dangerous for bees and fish.

You can also treat vegetable plantings to fight a fungal infection with Sulfarid, Bayleton, Fundazol, Previkur, Skor, Vitaros, Acrobat MC preparations. In the initial stages of the disease, it is permissible to fight the disease with sulfur-containing drugs, such as Thiovit Jet or VDH. Effective and copper-containing - oxychloride, Bordeaux liquid in the proportion of 1 teaspoon per 10 liters of water.

Quite diverse are folk methods of struggle, which have proven themselves among gardeners for many years.

A soap-soda solution has always helped to get rid of a fungal infection. For its preparation, 5 grams of liquid soap, 25 grams of soda ash per 5 liters of boiling water are taken. It will be necessary to process the plants several times, after a break of 7-10 days.

Used to combat the disease and whey solution at the rate of 1 part per 10 parts of water. Processing is done 3 times with an interval of 3 days.

A decoction of field horsetail - 100 grams of horsetail per 1 liter of liquid. It is not difficult to prepare it. Horsetail is poured with water and aged for a day. It cools and strains. Before spraying it is diluted with water in a ratio of 1:5. Plants are sprayed with it 3 times every 5 days.

Copper sulfate in the amount of 5 grams is combined with 50 grams of soap and 5 liters of water. The resulting emulsion should be treated with landings at least 2 times, taking a break of 1 week.

A mustard solution will also help in the treatment. To prepare it, 2 tablespoons of mustard powder are stirred in 10 liters of warm water. Next is watering the vegetables.

Among folk methods of struggle, processing cucumbers with a solution of soap and ash is popular. It will require 1 kg of ash per 1 bucket of water. The solution should be infused for about 1 week. Before processing, which will be carried out every day or every other day, add a little soap.

A solution of rotted mullein will also come to the aid of cucumber plantings - 1 part to 3 parts of water. It is insisted for about 3 days. Before use, dilute with water, increasing the volume by 2 times.

Infusion of garlic - 50 grams per 2 liters of water. Garlic is crushed, placed for 1 day in cold water, then filtered.

Another recipe for fighting the disease is 80 grams of copper sulfate, 50 grams of soda ash, 10 liters of water.

You can try treatment with a solution of colloidal sulfur. To prepare it, you need 40 grams of sulfur per 10 liters of liquid.

In addition to powdery mildew, downy mildew, called penosporosis, is also distinguished. It is distinguished from powdery mildew by the presence of yellow spots on the surface of the leaves, not white. Since it is even more difficult to deal with it than with an ashtray, it is better to take preventive measures: seeds should not be sown very thickly, crop rotation should be followed, crops should not be watered with cold water, it is required to harvest on time.

If the appearance of downy mildew could not be avoided, measures must be taken to treat it. This will help drugs such as Kuprosat, Ridomil, Oxychrome. Folk recipes are effective against the false form of the virus, for example, spraying with whey in combination with copper sulfate (1 teaspoon per 3 liters of whey and 1 bucket of water).

How to warn

Experts advise growing such varieties of cucumbers that have a strong immunity to the disease. These are Ofix, Swallow, Phoenix, Darling, Octopus, Pasadeno, Pasamonte.

Sanitary cleaning of the territory (removal of plant residues and weeds from it), adherence to crop rotation rules (return of pumpkin crops to their usual place no earlier than 3 years) are used as preventive measures. Preventive measures include isolating crops to keep the virus from spreading more than 20 meters away from similar crops. It is also required to regularly thin out plantings, remove old leaves from cucumbers that touch the surface of the earth. It is important not to make a lot of nitrogenous dressings, to feed crops with phosphorus-potassium fertilizers in a timely manner.

There is a type of disease prevention tested by many gardeners.

Even before the leaves bloom, namely in early spring, the bushes on the site are scalded with boiling water. Do this quickly, using a watering can with a diffuser.

Such an effect does not harm plants waking up after hibernation, but leads to the death of fungal infections. It is permissible to resort to the help of a household steam cleaner - a jet of steam, which is supplied under high pressure, has a similar effect.

Video "Methods of counteracting powdery mildew"

In this video, an experienced gardener will tell you what to do to prevent and treat one of the most common fungal diseases that affect gardens and orchards.

​Related Articles​

In most cases, infestations can be avoided with proper planting, fertilization, and watering practices. Follow the recommendations of professional gardeners and harvest a rich harvest.​

For prevention, you should properly irrigate the land. Moisture becomes favorable for the spread of most insects, but only dry soil is suitable for a tick. Garlic or onion infusions (10 liters of water and 200 g of husks) will help with the destruction of colonies. It is necessary to spray the bushes 4 times a season.

This disease can be massive, and spread in foci in vegetable gardens and greenhouses without proper heating. Fungal diseases of cucumbers affect plantings at various points in their growth. The problem with Fusarium is that the infection may not manifest itself outwardly until the plants enter the fruiting phase, when they begin to wilt and die. Anthracnose is expressed in yellow-brown spots

Powdery mildew of cucumbers

The soil needs to be loosened and properly fertilized.

An effective and reliable way to deal with powdery mildew on cucumbers is spraying with Topaz. This remedy can also be used to prevent the disease.

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Treatment of cucumbers for peronosporosis - the most effective recommendations

And, of course, it is necessary to spray the plant itself on a green leaf. Planriz is well suited for this, based on an extract from herbs, which prevents the disease. Of course, our breeders take measures not only to combat this disease, but also develop plant varieties that will be more resistant to downy mildew. When buying seeds, pay attention to the description of the variety. Gardeners must take some measures on their own to avoid the appearance of this disease.

Symptoms of the disease

Determining peronosporosis on cucumbers is easy. It is expressed in the form of massive brown and yellow spots on the foliage of the plant and affects it at all stages of development. You can visually see peronosporosis in cucumbers in the photos posted by gardeners on the Internet.

The most common cucumber disease is powdery mildew. In addition, these plants also infect infections such as mosaic and root rot. Each of them has its own methods of struggle, as well as preventive ones. Let's consider them in more detail.

Burn the tops and cultivate the land with Hom

Voracious whitefly larvae

• Fusarium wilt of cucumber, the treatment of which does not bring proper results, must be prevented at the planting stage. You can avoid infection by:
• Yellow-brown spotting on the foliage and pink bloom on the rest of the bushes is most often the result of anthracnose, which develops to a greater extent with excessive moisture. At first, a barely noticeable mucus appears on the culture, however, in places of its concentration, small ulcers almost always form, which lead to the death of the bush.
• It is this cucumber disease that is considered the most common. Its signs are noticeable not only on the leaves (small white spots, gradually covering the entire surface), but also on stems with petioles. The disease paints the lashes completely brown, they dry and fall off.
• The remains of last year's plants must be removed from the beds, as they may contain insect larvae and viral bacteria.

Cultivation of cucumbers is a rather troublesome business. The following conditions must be met:​

Treatment and prevention of peronosporosis of cucumbers is also carried out using chemicals.

For example, plant early varieties, which makes it possible to harvest before the onset of cold weather, during which peronosporosis develops favorably. Since there is a risk that the seeds are already infected with this disease, they are recommended to be treated with a 0.1% solution of potassium permanganate before sowing.

These spots tend to grow very quickly, which ultimately leads to the drying of cucumber foliage. The disease affects both plants growing in a greenhouse and those grown outdoors.

Root rot is a dangerous disease caused by a fungus. Infected plants begin to rot at the root collar. As a result of this, the lashes die off. This cucumber disease, like most infections, is easier to prevent than to treat later. Most often, plants are affected as a result of waterlogged soil and air, for example, in greenhouses, as well as during sudden changes in temperature. Therefore, do not water cucumbers too often. In addition, if a cold snap is expected in the spring, the plants are covered with a film in the open field.

I would not like to talk about sad things, but it seems to me that powdery mildew on cucumbers will be loved. As the specialist said on the box - if the first spots appeared on the leaves - the plant is 70% affected.

A microscopic insect moves and lives no more than a day in the air, but manages to lay voracious larvae on the leafy part of the cucumber. They suck the juices out of the culture, which leads to the development of soot fungus.

dressing seeds;

What methods should be adopted to combat downy mildew

Moreover, peronosporosis can also spread to nearby plants related to cucumber, such as:

If, however, such a disease of a cucumber as root rot nevertheless manifested itself, at its first signs, the stem is instilled with earth two internodes from the root. And, of course, you need to take care of such plants especially carefully: weed, loosen, feed. Strong cucumbers will resist disease better. This is one of the main preventive measures. In addition, do not leave last year's tops in the garden. It needs to be raked and burned.

​Focus on PREVENTION!!​
It is difficult to neutralize the whitefly due to its fertility. The methods of removing insects themselves are not so complicated, it is enough to regularly wash off the larvae from the bushes and loosen the soil, followed by the introduction of peat or humus into it. Spraying with Inta-Vir will help get rid of colonies that have already gathered on the leaves.

maintaining the required humidity and temperature conditions in greenhouses;

To prevent cucumber disease in the greenhouse and in the plots, it is necessary to sow only proven seeds in sufficiently warmed and cultivated soil. It is better to purchase seed from friends, from official agrotechnical companies, or harvest it yourself. With anthracnose that has already manifested itself, the treatment of cucumbers from diseases with folk remedies helps:

If powdery mildew appears on cucumbers, measures to combat it will consist of pruning the affected parts of the stem and disinfecting the soil. Recommended processing:​

Do not forget that diseases of cucumbers in a greenhouse and their treatment require a thorough approach. In greenhouses, as in open gardens, the frequency and rate of fertilizer application are of great importance. It is not recommended to exceed the composition of the elements: urea (6-12g), superphosphate (about 10g), potassium chloride (about 8g) and ammonium nitrate (no more than 6-7g) per 10l of water.​

LetovSadu.ru

Methods for dealing with powdery mildew on cucumbers

preparation of seedlings and sowing material;

As soon as you notice peronosporosis on cucumbers, urgent treatment of the plant is necessary.

This will be a real breeding ground for downy mildew fungi. Another very important point - never plant cucumbers, pumpkins, zucchini every year in the same place. Choose a different site - this will certainly help to avoid an outbreak of a second disease. Now, as for the soil in the greenhouse: after the end of the season and harvesting the plant, you need to remove the top layer of the earth. And then this section of the greenhouse needs to be treated with a 0.1% solution of potassium permanganate.

zucchini;

Another cucumber disease - powdery mildew - affects the leaves of plants.

KakProsto.ru

Diseases of cucumbers photo, description and treatment in the greenhouse, in the open field

Good question. I am also looking for an answer to it. Of particular interest is downy mildew. When young cucumber leaves, green, beautiful, 5-7 pcs. And then the disease hits. How to protect them, how to effectively spray, water. Which of the gardeners has such experience.

• Ants breed aphids on cucumber foliage
• Thorough disinfection of the earth and treatment of the material with Trichodermin (5 g per 1 kg) will not interfere.
• A mixture of lime milk and copper sulfate;

ground sulfur up to 30 g for every 10 sq.m. vegetable garden;

Diseases of cucumbers photo and their treatment: prevention

The most dangerous for plants is the treatment with the wrong means and fertilizer with the wrong preparations, so it is important to identify the disease by external signs and know the preventive and therapeutic methods.

Careful care during the period of active growth.

• Now combined fungicides are widely used for this: Copper oxychloride, Efal, Ridomil Gold. These preparations are more suitable for spraying in a greenhouse. On the open field, Acrobat MC has proven itself well.​
• The most important rule is to avoid seed contamination. To do this, planting cucumbers is recommended to be carried out in places where the occurrence of peronosporosis is unlikely or impossible at all. For disinfection of seeds, the heat treatment method is very good. To do this, place the seeds in water with a temperature of +50 degrees for 15 minutes.
• pumpkin;
• At the first stage, a characteristic white coating appears on their surface. Then the leaf blades begin to darken and eventually die off. The disease is caused in the same way as in the first case, by a fungus of a special kind. The development of this infection is facilitated by high humidity and insufficient care for plants.
• For a bucket of water, a liter of whey and 1 tsp. l. iodine, sprinkle plenty of cucumber foliage, no diseases, harvest until October.
• These are pests that dig millions of underground tunnels and contribute to the appearance of aphids on leaves and stems.
• Most infections are carried by insects, so it is important to monitor their spread and take preventive measures in time.

Diseases of cucumbers photo of leaves and fruits: treatment and prevention

A solution of bleach (up to 40 g per 10 liters of water).

white rot

White rot of cucumbers appears on the stem

As a result, all work may be in vain if cucumbers are attacked by pests or get sick. In this case, the entire crop can be destroyed. That is why it is always necessary to apply preventive measures when growing.

root rot

After harvesting the last crop, be sure to destroy all the remains of the plant, disinfect the soil.

powdery mildew

This number does not work with tomatoes, from personal experience - there is no 100% remedy for phytophthora, I process "redomil-gold" 2 times, I try to plant super-early varieties early and when it starts with 4-5 tomato brushes, I break off the vurkhushki so that they have time to give a harvest before the mass phytophthora invasions - obtained by 90%

Fighting them is simple: with the help of sweet baits (syrup) and dusting the earth with ash or lime. Noticing the nests of ants, you can pour boiling water over them, dig them up or pour plenty of kerosene (waste oil is also used).

Pests of cucumbers - melon aphid

• Dark brown and olive spots are a sign of cladosporiosis
• Deep digging of beds, scrupulous destruction of plant residues, systematic application of potassium fertilizers will also not be superfluous for prevention.

Most often cucumbers are affected by leaf diseases, covering their shoots, antennae, peduncles and ovaries over time. With white rot, the plants are completely covered with mucus and plaque. The infection develops especially quickly in greenhouses with dense plantings, high humidity and stagnant air.

Remember, if you are at least 1-2 days late, the plant may die and cannot be saved. It is also important - do not allow excessive treatment of cucumbers with fungicides, because this is a direct path to the accumulation of pesticides and harmful substances in them. These drugs have the property that stops the growth of fruits, as well as reducing yields.

Try to maintain normal soil moisture during the growing season of the plant without an excess of watering.

watermelons.

Anthracnose

grow in a greenhouse .. change the ground every 2 years, treat the greenhouse from the inside from diseases, do not thicken the plantings, ventilate during

Slugs damage mainly leaves, but can also eat fruits.

Small pests of cucumbers, ruthlessly destroying ovaries, flowers and leaves, are far from a wonder for experienced gardeners, especially in rainy seasons. To destroy them, you need to take care of the correct circulation of plantings on the site, dig and disinfect the soil and carefully get rid of weeds.

• Many of the considered diseases of cucumbers and their treatment concerned damage to the foliage and stem, from which the plant itself died. Cladosporiosis damages mainly the fruits themselves. Small, but numerous, watery-type spots appear, which quickly grow and harden, which leads to cracking of the skin of the vegetable and its death.
• Greenish plaque and yellow spots are signs of peronosporiosis

Cladosporiosis

Professional gardeners recommend following some planting and growing rules to avoid problems and additional care later. It is with these simple tips that one should begin to consider cucumber diseases and the fight against them will not seem terrible and endless.

Plants are susceptible to dangerous diseases at different stages of development. Cucumbers are no exception. A common cucumber disease is powdery mildew. Timely treatment and prevention will help preserve the harvest.

Grow those hybrids that are less susceptible to this disease (Katyusha, Debut, Rodnichok, Golubchik, Kumir, Zodiac and Photon). These varieties are grown both outdoors and in a greenhouse. The most popular outdoor cucumber variety is Phoenix 640.​

Diseases of cucumbers photo leaves treatment for fusarium

Diseases of cucumbers in pictures you can see on this page. In addition to the above, there are other, no less unpleasant infections. In order to minimize the risk of infection, it is necessary to observe agricultural practices: feed, weed, loosen the plants in time, and also prevent thickening. In this case, the cucumbers will remain healthy, and you will get just an excellent harvest both in the greenhouse and in the open field.

Don't flood the tomatoes. Cut off all lower branches and ventilate the greenhouse. And this cup will pass you by)

• Insects are afraid of daylight, so they choose to feast on fresh herbs and fruit pulp at night. Dark droppings and characteristic shiny traces of slugs also do not contribute to improving the quality of the crop.
• When the aphids have already attacked the plantings, spraying them with a fermented herbal infusion (1 kg is infused in 10 liters of liquid for a day) or an ash suspension (10 liters of water, 50 g of soap shavings, 200 g of ash) will help.
• This disease is also called olive blotch, which can spread directly through the air, infecting areas with cucumbers during irrigation or during rains.

Cucumber pests with photos and their treatment. Ways to fight

An enemy that destroys entire fields is manifested by a greenish bloom and yellow spots on the upper part of the foliage. It tends to spread over the entire surface of cucumbers and infect plantations growing in the immediate vicinity.

melon aphid

So that the diseases of cucumbers, the photos of which are in the article, do not interfere with rooting and growth, it is worth giving preference to resistant varieties.

Powdery mildew is a common disease. You can detect a disease on a plant by looking at the leaves - they are covered with a white bloom. First, the leaves turn white, then dry out and die. Powdery mildew spreads rapidly when the temperature drops and when watering with cold water. It is necessary to fight the disease when the first signs appear.

spider mite

Since peronosporosis is a fungal disease, its reproduction occurs through the spread of spores, or more precisely, zoospores. Their unique flagellate shape allows them to move through liquids. And each watering of the plant contributes to their favorable reproduction and infection of all new plants.

Cucumber is a very ancient vegetable. It appeared 6 thousand years ago. Initially, it was grown in the tropics and subtropics of China and India. This product is a real storehouse of vitamins. It contains vitamins B, C, potassium, phosphorus, iron, magnesium, and also promotes the rapid absorption of animal fats. Therefore, meat dishes go very well with salads or cuts, which include this most useful vegetable. But, sadly, every year growing cucumbers is becoming an increasingly difficult process.

whitefly

Regular digging of plots and their pollination with ash or chalk will help to destroy pests. You can also try to lay out special shelters in which slugs will find shelter, and collect them during the day. It is also recommended to treat cucumber beds with Metaldehyde.

Spider mite breeds in hot weather

Ants

Downy mildew, also called downy mildew, can spread rapidly due to frequent fogs, a lot of dew, too cool watering and temperature changes.

The disease is dangerous for the measles system, because with it part of the rhizome dies, and the stem itself becomes rotten, and the plant dies just before our eyes. Root rot is caused by cold weather, heavy and too wet soil, and poor quality seeds. Almost all diseases of cucumbers of an infectious nature are dangerous because the pathogen can stay for a long time in the beds, in greenhouses or uncleaned plant residues.

Slugs

Spraying with a special solution will help to cope with the disease. For 10 liters of warm water, you need to take 1 liter of liquid mullein and 1 tbsp. a spoonful of urea. The solution must be well stirred and filtered. Leaves are sprayed both from the bottom and from the top side.​

It is very important to increase the resistance of plants to possible diseases by fertilizing with mineral and organic substances.

Outcome

Even the seeds of the plant can be carriers of the spores of this fungus. And even worse, pests can successfully survive the winter on last year's leaves that have fallen on the ground. Peronosporosis can affect a plant at all stages of its development, from the growth of the first leaves to the ripening period.

There are many diseases, and new ones appear that interfere with its growth, productivity, and even lead to the death of the plant. Infectious diseases hinder the growth of the plant, whether it grows outdoors or in a greenhouse. Today we will talk about such a disease as peronosporosis.

A fungal disease that destroys crops. The loss is significant - in the years of epitophies, up to 70% of the loss of the crop. Whitish spots, withered tops, twisted leaves, in the garden - only a couple of cucumbers: the picture is unsightly. It's not hot!
Powdery mildew on cucumbers - find and defeat, characteristic signs, symptoms, treatment - how to deal with powdery scourge.

The incubation period is 3-5 days. It spreads in a damp warm climate, all regions where the crop is grown are under threat. Outbreaks of harmful dew on cucumbers are usually observed 3-4 days after the rains. For the growth of condidia, the optimum temperature is 16-22 C and high humidity. Active sporulation occurs at low relative humidity, an abundance of light.

• The difference between daytime air temperature and night temperature becomes a factor contributing to a decrease in plant resistance to the pathogen.
• It lives in plant debris remaining for the winter, weeds in the form of cleistothecia (marsupial stage) of the fungus, a short time interval is preserved in the form of condidia.

Symptoms, features, characteristic signs

• A spore-bearing fungus, powdery mildew, looks like a white fluffy coating on cucumber leaves. The first signs are rounded whitish or reddish light spots on the upper side of the plate, with time they appear on the lower side. Further, the spots merge, spreading to all green parts, including petioles and shoots. With a strong defeat, individual whips dry out.
• The leaves take on an ugly shape, curl up, the surface becomes loose, dotted with waves. Eventually the green parts will dry out and die. Thus, most of them are lost, plants are weakened due to lack of nutrition and oxygen, and often die.
• A frequent guest is powdery mildew on cucumbers in a greenhouse due to the presence of drip moisture and unacceptably high air humidity - up to 80%, which, in fact, violates the agricultural practices of cultivation. As a clear example of this - the appearance of the first outbreaks near open windows, frames.
• Most often, the disease can be detected on real cucumber leaves, sometimes on cotyledons.

Control measures in greenhouses always complement prevention measures: exclusion of high humidity, absence of water accumulation areas, ventilation, surface treatment with fungicides, fumigation of the room.

Basic Prevention Prevention Measures

The following varieties are most resistant to the pathogen: Phoenix, Golubchik, Swallow, F1 hybrids Pasamonte, Pasadeno, Opix, Octopus

• As a preventive measure, it is necessary to take the following agrotechnical measures to combat powdery mildew of cucumber:
• Sanitary cleaning: removal of plant debris, cleaning of weeds.
• Crop rotation: the return of pumpkins to their original place no earlier than 3 years.
• Isolation of pumpkin crops to avoid infection between similar crops is at least 200 m.
• Planting infection-resistant varieties and hybrids.

We fight with white scourge

• Recall folk remedies to protect cucumber from powdery mildew:
• Milk whey (reverse) in a ratio of 1:10, sheet processing to form a protective film, suppressing the spread of fungus.
• The soap solution acts in a similar way - it protects the surface of the leaf from the introduction of the pathogen.
• Three-day mullein infusion also has some fungicidal activity. Use 1 kg of manure: 10 liters of water.
• Nettle, tobacco are used to prevent - an infusion or decoction is used for spraying before the bush is damaged.

Chemical means of treatment and prevention

• For prevention, before the first signs of powdery mildew appear on cucumbers, Topaz preparations are used (in a proportion of 2 ml per 10 liters of water or 0.025-0.05%), Quadris - 0.05%, Strotby (0.02%), SC in accordance with the instructions.
• It is worth noting the expediency of using such measures only for farms due to serious damage. For amateur gardening, such control measures are not always justified due to the lower risk of crop loss.
• When signs appear, spraying with Bordeaux liquid, fungicides Topaz, Thiovit Jet.
• At the initial stages, sulfur-containing preparations of VDH, Thiovit Jet, can be used; at later stages, when they are used, drying of the leaves is observed.
• Copper preparations - oxychloride, Bordeaux liquid in the proportion of 1 tsp. for 10 liters of water.

Depending on the preparation used, against powdery mildew on cucumbers, the first treatment is carried out before flowering, if necessary, repeat the required number of times. You should pay attention to the waiting period - the period during which the fruits can not be eaten. Given the short growing season of the crop, it is worthwhile to be careful about the choice of infection control measures.

Cucumbers often suffer from viral and bacterial infections of various origins. Gardeners are faced with such a dangerous disease as downy mildew of cucumbers (another name for this infection is mildew). Symptoms of this disease can be easily seen by visual inspection of cucumbers. Photos of leaves and fruits affected by this disease can be viewed on the Internet and in specialized literature. There you can also read about new, progressive, and old, time-tested measures of struggle.

Choice of control measures depends on how badly the cucumber leaves are affected. Photos of plants suffering from this disease can also be found in newspapers and magazines for gardeners and gardeners. Before planning measures to combat the infection, you need to find out the cause of its occurrence and spread. Sometimes removing this cause helps to end this cucumber disease once and for all, without resorting to powerful chemicals.

Powdery mildew and other diseases of cucumbers

Cucumbers spend most of their life cycle on the ground: the lashes and leaves of the plant lie on the ground, in direct contact with it. Moist soil, especially in the absence of liquid drainage, is an ideal breeding ground for a variety of fungi, bacteria and viruses. Cucumbers are very susceptible to infectious diseases. It should be noted that cucumbers that curl and grow up the support are much less likely to get sick than cucumbers whose lashes lie on the ground.

At first glance, this may seem strange, but cucumbers that grow in a greenhouse suffer from downy mildew much more often than cucumbers growing in open ground. This is due to the fact that warm and humid air under the film contributes to the intensive reproduction of pathogens. If cucumbers that are in the greenhouse get sick, the main measure to combat the disease will be regular ventilation of the greenhouse.

Cucumbers suffer from other diseases. Fighting them is sometimes very difficult. Leaves and fruits affected by various viral infections can be seen in the photo on the Internet. Diagnosis of the disease by photo allows you to identify the causative agent of the disease in time and take competent control measures.

Most often cucumbers suffer from the following infectious diseases:

Powdery mildew: causes

Most often This fungal infection appears and spreads because:

It is quite easy to notice signs of the disease on the leaves and fruits. "Mealy" - from the word "flour". A characteristic white coating appears on the leaves, as if they were rolled in flour. If the disease spreads, and the gardener does not take any measures, not only the leaves, but also the fruits will soon be affected.

Fruits with white coating cannot be eaten. This fungal infection was called “dew” due to the fact that when the disease progresses rapidly, moisture is added to the appearance of a white coating: the leaves become wet to the touch. If you do not fight the infection, the leaves and stems begin to get wet and rot, then necrosis (death) of the leaves occurs, and the plant dies. It happens that entire areas planted with cucumbers die.

The disease practically does not affect cucumbers growing in hot and dry climates. Most often, the disease begins to develop when there are prolonged heavy rains in the summer for several days in a row. To prevent infection, it is advisable to loosen the soil after each heavy rain so that the liquid goes into the soil and does not stagnate. It is best to arrange a cucumber bed on a slight elevation so that water flows down after heavy rains.

Recently, domestic breeders have been actively developing new varieties of cucumbers that have strong immunity to this disease and other fungal diseases. Seeds of these varieties are quite expensive, but planting them avoids many problems.

Disease prevention

Disease affects not only cucumbers. This infection is also often observed in grapes and currants of different varieties, as well as in gooseberries. For prevention, cucumbers should not be planted next to berry bushes. After all, the infection tends to spread rapidly.

If it appeared on currants or gooseberries, then it will immediately switch to cucumbers, because plants grow on the same soil. If it so happened that cucumbers grow next to currants or gooseberries, in early spring, before the buds open, you should pour boiling water over the berry bushes. Then the disease does not threaten them, and, therefore, the cucumbers will not get sick.

There are also the following methods of prevention in cucumbers:

• you need to observe moderation in watering;
• the greenhouse in which vegetables grow must be regularly ventilated and disinfected;
• if possible, support should be installed for cucumbers. These can be wooden or iron sticks. When the cucumber curls and climbs up the support, the lashes do not lie on the ground, which means they are reliably protected from decay;
• if there are several plants in the garden with a severe degree of disease (white, weeping and rotting leaves), they will have to be parted. In no case should the affected lashes be taken to the compost heap, otherwise re-infection will occur. They should only be burned, observing fire safety rules.

If you follow these simple preventive measures, the gardener will be able to protect cucumbers from infection.

You need to think about prevention even in winter and early spring, when gardeners are just starting to prepare seeds for planting. If cucumbers have suffered from a disease all season, it is not recommended to use your own seed, it is better to purchase seeds in a store or from neighbor gardeners. If the gardener uses his own seeds, they must be stored properly.

After collecting the seeds, they are carefully dried (for example, on a newspaper or on a windowsill) and stored in a dry, dark place. You can store the seeds in an airtight tin or in a canvas bag. Before preparing the seeds for planting, you need to treat them with antifungal solutions, this increases the resistance of cucumbers to the disease.

It is recommended to plant seedlings on a sunny day, when there is dry warm weather for several days in a row, and there are no torrential rains. A foggy day when air humidity is high is not the best option for planting seedlings in open ground. The more moisture in the soil and air, the greater the risk of "catching" this dangerous disease.

Powdery mildew and downy mildew on cucumbers: control measures. Folk remedies

The old "grandmother's" remedies help well. The only disadvantage of such control measures is that these funds do not act quickly. To achieve tangible results, spraying cucumbers must be repeated several times and done systematically, and not occasionally. The most effective "grandmother's" way to combat the disease is based on the antifungal properties of common garden weeds.

During weeding beds need to be collected in one pile of thistles, wheatgrass and other weeds, and then finely chop this greenery along with the roots. Chopped greens are poured with water, and an infusion is prepared from it, which can be used for watering or spraying cucumbers. Repeat the procedure every day until the symptoms disappear completely. You can also use young spring nettle instead of weeds, it also fights bacteria and fungi well.

Powdery mildew on cucumbers: means for combating industrial production

If the disease was caught at the very beginning, it is quite possible to cope with it by limiting watering, loosening the soil and folk remedies. However, if you miss the onset of the disease, there will no longer be time to treat cucumbers with folk remedies.

In cases where you need to act quickly, industrial fungicides will come to the aid of the gardener. You can use fungicides (antifungal agents, which include chemicals) and biofungicides (antifungal agents, which include natural biologically active substances that prevent the appearance and spread of fungus). Some fungicides are toxic to humans, so all precautions must be observed when working with them.

If timely measures are taken, this fungal disease is easily treated. The main thing is to monitor soil moisture and pay attention to fluid drainage. At first, you can try the tried and tested "grandmother's" remedies, and only then, if they do not help, it is worth switching to more powerful fungicidal agents. Anyone can successfully cope with the fungus, even a novice gardener, if he notices the onset of the disease in time and does not allow it to develop. A disease that progresses will be more difficult to treat.

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