Diseases are the main problem of greenhouse cucumbers. The greatest harm to this garden crop is caused by various infections. In total, there are about twenty of them in greenhouses. Let's look at the most common and harmful diseases of cucumbers and how to combat them.

I am not a fan of chemicals in vegetable beds, I do without them, and I will not advise other gardeners to use them, except in the most advanced cases, when there is no other way out. For example, use a drug that is not the most poisonous - copper oxychloride ("CHOM") - 40 g per 10 liters of water.

Most fungal diseases are accompanied by sporulation on the leaf surface. If it is a white “floury” coating in the form of round spots (then the coating will occupy the entire surface of the leaf), then it is powdery mildew. When the first spots appear, the affected leaves are carefully cut off or dusted with ash. Sometimes plants are sprayed on all sides with a weak infusion of mullein or colloidal sulfur - 40 g per 10 liters of water. In advanced cases, you will have to use HOM, but it is better not to do this.

During sudden cold spells at night, multifaceted light uneven spots appear on the leaves, mainly closer to the edge of the leaf. The spots grow quickly and turn red. Finally, a gray-olive coating appears on the underside of the leaf, and the leaf dies. This is downy mildew (downy mildew). Here you need to immediately stop watering and fertilizing, dry the greenhouse by ventilating, and spray the leaves with whey.

Olive spot is a fungal disease when yellow-brown spots appear on the leaves and dark watery spots form on the fruits; the fruits become distorted. The disease usually appears at the end of summer. The greenhouse is ventilated, and the affected parts of the plant are destroyed.

In the second half of summer, usually at the end of July, gray rot appears - the stems and leaf petioles become slimy. To combat this disease, there should always be a glass of pink creamy mass in the greenhouse - a mixture of chalk, water and potassium permanganate. The rot is wiped off with a bunch of grass or a rough cut cucumber leaf, and the wound is smeared with sour cream. They do this in the morning, and by the evening the sore spot is already dry.

While the weather is warm, usually everything is limited to these diseases. But then comes a wave of cold. After a few cold days, the leaves on some plants begin to wilt during the day. By evening, when the sun sets, everything is restored. In the future, this is repeated, only every day the plants wither more and more. The day comes when in the evening they no longer come to their senses, and the leaves gradually dry up. This means it’s too late, the plant cannot be saved.

Young plants can get sick, but it is especially offensive when they have already become adults and have begun to bear fruit. If you pull such plants out of the ground, you will see that their roots have become red and rotten. This is root rot - one of the most dangerous and widespread diseases in our area. Based on external manifestations, this disease is difficult to distinguish from vascular bacteriosis.

Root rot develops due to unfavorable conditions during growth, and especially fruiting. Plants weaken and are attacked by all sorts of fungi and bacteria living in the soil. If cucumbers grow in one place for many years, then the number of harmful inhabitants in the soil accumulates over the years and the danger of disease increases.

Cucumbers grow weaker in dense and acidic soils. They also weaken if the soil cools below 140C or overheats above 280C, because at these temperatures the roots are not able to work at full strength.

Insufficient or excessive watering, especially with cold water, also greatly weakens the plants. Any of these reasons can lead to illness.

When the first signs of root rot appear, you need to take immediate action. I was able to save young plants by adding a layer of fertile soil to the stems so that they would grow new roots. If the cucumbers are tall enough, then the lower leaves are cut off the stem, the cut areas are allowed to dry, and then the stem is laid on the ground (you can use it in a ring) and fertile soil is added to it. After 1-2 weeks, additional roots will grow on it. After this, you need to add more soil, and the plant will be saved.

This method is suitable if the disease was caught at the very beginning. Otherwise, you will have to dig up the plant along with the soil, and fill the resulting hole with nutritious soil. The remaining plants will have an easier time living.

However, it is better not to wait for diseases to appear, but to carry out prevention. So, when buying seeds, you need to choose varieties that are resistant to the diseases that are most actively rampant in your greenhouse. Typically, seed bags indicate which diseases a given variety is resistant to. You should also try to observe crop rotation, returning the cucumber to its original place no earlier than after 2-3 years. Usually we don’t have such an opportunity, there’s only one greenhouse. Therefore, you will have to change the soil in the greenhouse every 2-3 years, at least the top layer 10 cm thick, in which most pathogens live. It is also necessary to create conditions for the development of beneficial microflora. To do this, add well-rotted compost to the soil. Now a very effective drug has appeared on sale - Fitosporin M. It protects plants from powdery mildew, peronosporosis, brown spot, and root rot. It must be used according to the attached instructions. I use Fitosporin M even before the onset of the disease. Since this drug appeared relatively recently, a large number of reviews about its effectiveness have not yet accumulated. But personally, I got the impression that after using it, red, yellow and white spots stopped spoiling my cucumbers.

In order to prevent diseases, scientists also recommend spraying plants with the Amulet preparation at the second and fourth leaf stages. Microbiological preparations are also beginning to be introduced.

It is useful to spray the soil with nettle tincture - it greatly invigorates the microflora. Nettle infusion is made as follows: fill a bucket (enamel or plastic, but not iron) with chopped nettle shoots collected before flowering, fill it with water, cover with a lid and place in a sunny place. Stir daily with a stick. They do this for about a week, until gas bubbles stop being released. When the liquid acquires a terrible smell, it is ready for use. For spraying, it is diluted with water in a ratio of 1:10. The remaining grounds are thrown onto the compost heap. It is useful to spray the soil not only in the greenhouse, but throughout the entire garden.

In industrial greenhouses, chemicals and special steaming of the soil are used. For gardeners, these methods are unacceptable.

In general, experienced gardeners have noticed that there are almost no diseases in the greenhouse if it is ventilated as often as possible, although there is an opinion that tropical plants require a tropical atmosphere and do not like drafts. Who loves them? A dangerous draft is when a stream of street air rushes into the bathhouse atmosphere. This means there is no need to create this bathhouse atmosphere. Let a dry sunny breeze blow through the greenhouse all day long. This will add health to the plants; there will be no trace of rot or fungi. The main thing is that every morning, as early as possible, when it is still cold outside, you need to open the greenhouse before it warms up. If you open it later, you get the effect of a draft: the plant has already tuned in to tropical humidity, and suddenly a stream of cold air is given into its leaves. There is something to be sad about here.

First you need to open the top of the greenhouse, and then the doors, so that ventilation goes from top to bottom. This procedure is especially useful in the morning, when the air is saturated with a kind of “prana” - positive energy, absorbing which the plants become healthier and cheerful right before our eyes. Together with the owner. The morning sun is the most beneficial. At this time, the bees are already working hard. Therefore, all activities in the cucumber greenhouse should be carried out as early as possible in the morning - at 7–8 o’clock. Those who overslept lost part of the harvest.

Every morning you need to look through all the plants, say hello to them, remove sores, tendrils, spent yellowed and diseased leaves, and pinch out side shoots. Lubricate all wounds with sour cream.

By the evening, when the sun's heat subsides, the greenhouse, which has dried out during the day, can be packed, closing all the windows and doors. The heat will then remain longer. At this time, the most active growth of cucumbers occurs. They are neither hot nor cold.

In August, when the nights become long and cold, you will need to increase your vigilance and carefully inspect the plants for rot. You will have to remove all the lower leaves and spent side shoots - this will make it easier to ventilate. At this time, you can water the plants less often, and only in the mornings in sunny weather. In addition, you must not forget to mulch the soil.

Bela Senich

“Garden Affairs” No. 6 (22), 2008

Read with this article: why cucumber ovaries turn yellow

What pests of cucumbers are there and how to get rid of them in simple and accessible ways. It seems that pest control can be endless. Russia is a country where, during the period of planting and growing cucumbers, the climate is hot and arid. It is loved by various pests that actively reproduce and are active at high temperatures.

Owners of summer cottages spend a lot of time and effort caring for cucumbers. This process is not easy, but it cannot be avoided if the desire to get a healthy harvest is at stake.

This article will discuss control methods and preventive measures that are carried out in greenhouses and in open ground conditions when growing cucumbers.

Melon aphids on cucumbers - how to fight aphids on cucumbers

Description of the cucumber pest

Aphids are considered the most formidable pest, since they eat first the flowers, and then the entire plant as a whole, including shoots. Since the life of aphids occurs on the plant, the cucumbers die.

This insect becomes active in mid-summer. Its reproduction occurs at a rapid pace. After a few days, the reverse side of the leaf facing the ground becomes infected. Flowers and ovaries are also infected.

How to liquidate

It is important to ensure that there is no grass on the site. After harvesting, it is necessary to remove all plant remains completely, leaving nothing behind, and then burn them. This is due to the fact that aphids can migrate from the grass to cucumbers.

In the case when the insect was noticed, prepare the mixture:

Fill the bucket with 10 liters of water (the water should have a temperature of about 60 degrees).
Take capsicum - 30 g. It must be finely chopped. If this pepper is not available, replace it with dry ground red pepper in the amount of 10 g.
Take tobacco dust in the amount of 200 g.
The components are mixed in a bucket of water.
The solution is infused for 1 day.
Then it is mixed.
Strain.
You need to add 4 teaspoons of burnt wood ash and liquid soap to the mixture.

When treating a plant with this solution, take 2 liters for each square meter of treated area.

Based on these calculations, it turns out that this bucket is only enough for a 5 sq. m plot. If the area planted with cucumbers is larger, then more solution must be taken. Repeat this procedure after 7 days.

No less effective will be the use of such a solution:

Take a 10 liter bucket of hot water.
Add 1 cup of burnt wood ash.
You should also add 4 teaspoons of liquid soap
Leave for 24 hours.
Spray as in the first option.

Advice! The weather during this procedure should be calm, without wind. The best time for this is evening.

To destroy aphids, an equally effective remedy is used - a solution of karbofos. In a 10-liter bucket with warm water, dilute 1 or 2 tbsp. this drug.

If the solution has a high concentration, it is used to treat paths and films in greenhouses. When the concentration is weak, use cucumbers directly. The processing process is best carried out in the 2nd half of the day, when the sun is not so intense.

Photo: Melon aphid on cucumbers. An oblong green round insect. Aphids suck juices from leaves, and when there is a large population of plants and terminal stems

When procedures related to spraying are carried out, after they are completed, there should be no open windows, transoms, or doors. You can fight aphids with the help of insecticidal infusions.

For this you can use: henbane, garlic, dope, onion, etc. All the following solutions are made with 10 liters of water:

Henbane (leaves and roots) is needed in the amount of 1,000 g dry, or 500 g fresh. Leave for 15 hours.
Dry mustard in the amount of 1,000 g is infused for 24 hours.
Fresh dandelion leaves - 250 g (or 330 g of finely chopped roots of this plant) infuse for 2 hours.
Add 0.5 tbsp. pepper, mustard.
Potato tops – 1,000 g, red pepper (ground) – 10 g. These components are infused for 4 hours and used immediately.
Onions (1 cup) are finely chopped or passed through a meat grinder. Add 2 tsp. alkalis. Leave for 3 hours. Strain.

Important: before you start using these infusions, add 2 or 4 tsp. liquid soap.

Spider mites on cucumbers in greenhouses and open ground

By what signs are insects recognized?

If cucumbers are infected with spider mites, the following signs may indicate this:

Nadezhda Nikolaevna, 49 years old

- the appearance of dots of light shades (if the damage is serious, these will already be spots) on the back of the sheet;
— a thin web appeared on the plant;
- growth has become slower;
— the leaves began to turn yellow.

Methods and actions to destroy the pest

What should the owner of a garden or plot of land do to eliminate spider mites?
Activities that bring good results:

It is necessary to dig up the soil before planting seeds. This is important, since most harmful insects wait out the winter in the upper layers of the soil.

Spider mites first show their activity when they are on weeds. To prevent it from moving onto cucumbers, they must be removed regularly.

It is advisable to inspect plants as often as possible. If affected leaves are found, they are removed and burned.

It is necessary to change landing sites. You can, for example, next year, instead of cucumbers, plant cabbage or tomatoes. As soon as the spider mite has been detected, the infestation sites are treated with biological preparations.

How to destroy spider mites in a greenhouse

Those plants that grow in greenhouses are at greater risk than others of becoming infected with spider mites. It is in the greenhouse that the most beneficial conditions for the life of this harmful insect are found: a temperature of 30 degrees, not a very high humidity level.

Photo: Spider mite. Ticks are prolific - several generations per season. The female lays one and a half hundred eggs.

Methods for destroying spider mites on cucumbers in greenhouse conditions:

If you create a humidity level of more than 60%, the pest will obviously not like it. If you make sure that the humidity level in the greenhouse is about 85%, this is a good preventative method to prevent insect activity. If cobwebs appear on cucumbers, what should you do?
When cucumbers are grown in a greenhouse, it makes sense to include the following among the main actions aimed at combating spider mites:
Carrying out fumigation of the entire greenhouse in the autumn, as soon as the entire harvest has been harvested, as well as in the spring before sowing. It is necessary to ensure complete tightness.
Once the crop is harvested, it is necessary to remove the top layer of soil.
Using a gas burner, you need to burn down the trellis.
Fertilize the soil with mixtures containing phosphorus.

Insectoacaricides, as well as acaricides, are the drugs used to destroy spider mites. Today there are no systems protecting against these agents so that they do not have a negative impact on humans. This is why it is dangerously unsafe to use such remedies.

Gardeners noticed that products with intestinal-contact action showed excellent results after use. Cucumbers are treated with them several times. It all depends on the temperature. The higher its indicator, the more often the plants need to be treated.

The most effective drugs aimed at destroying spider mites are:

Spark – Bio.
Phytofarm.
Karbofos.
Bitoxibacillin.

Note to summer residents: it is advisable to carry out work related to the treatment of cucumbers in the evening so that the sun does not get too hot. Then the chemicals will not have time to evaporate, and the harmful insect will be eliminated.

If you don't want to bother with chemicals, there is a harmless way to save cucumbers. Using the phytosailus mite you can get rid of spider mites. You need to take a predator and place it nearby near infected areas. The phytosailus mite will destroy the eggs of the pest. To achieve maximum effect, ticks should be reintroduced every 21 days.

Summer residents and gardeners consider the following to be quite popular folk methods of combating spider mites:

It is necessary to spray the cucumbers with a solution of soap;
Flowering plants need to be planted;
The Entomophthora adjarian mushroom is planted on the plot.

Greenhouse whitefly: signs and measures to combat the pest

Signs by which whiteflies are recognized

If suddenly the owner of the greenhouse notices a tiny white midge, it could be a whitefly. It also comes in yellow or gray. It goes through the following stages of development: larva – nymph – adult – imago.

Throughout this period, she needs plant sap for her life. To get it, the insect makes punctures in a juicy young leaf.

An adult insect reaches no more than one and a half millimeters in length. The difficulty lies in the intensive reproduction of whiteflies. One individual lays more than 100 eggs. After a week or two, a huge number of children of the harmful insect are born.

A greenhouse is a place that is 100% suitable for whitefly activity. The air here is warm, the humidity is just the way she likes it.

What else is needed in order to reproduce at a rapid pace? If the air temperature in the greenhouse is high, the larva of a small pest will very quickly become an imago. That, in turn, will be able to fly and lay many eggs on the leaves of cucumbers.

Photo: Whitefly. You can notice a pest attack on cucumbers by the wilting of the leaves.

The ripening process usually takes up to 25 days. Adult insects can live from 2 weeks to 1 month. As soon as the whitefly is born, until it dies, it will try to harm the plants in the greenhouse, no matter what stage of development it is at.

How to deal with whitefly in a greenhouse

If you carry out preventive measures in a greenhouse with cucumbers planted, it is much more effective than then trying to get rid of whiteflies using force and means. Greenhouse owners need to remember to ventilate the greenhouse.

On a note! Drafts are good, but small pests cannot tolerate them. The leaves of cucumber bushes should be inspected regularly to see if flies or larvae have appeared on the front or back side of the leaf. As soon as you suspect that a whitefly has become an inhabitant of the greenhouse, you immediately need to start fighting it!

There are certain ways to destroy the white pest. To choose a product, you need to look and decide on the number of whiteflies.

If plants are infected only at the initial stage, it is worth using insecticides with an immobilizing effect. For example, it could be “Aktelik”, “Aktara”, “Vermitex”, “Confidor”, etc.

If plants are treated with these agents, insects will be paralyzed. They will not be able to move, which means they will not be able to eat, which will lead to their death within 2 days.

The drug that was sprayed on the plants lasts approximately 20 days. The larva will still continue its development, since it needs 25 days for this. The effect of the product will wear off until new adult insects grow.

In the case when the whitefly has already laid eggs, products for other purposes are suitable for use. These are: “Admiral”, “Mospilan”, “Match”, and others. The main thing is that they eliminate the larvae.

It often happens that to combat whitefly eggs and adult pests, products of groups 1 and 2 are used together. Be that as it may, it will be necessary to repeat the treatment with plant preparations in 5 days.

It is advisable to change pairs of drugs without repeating them twice. If the whiteflies are dark, it is worth repeating the procedure 3 times. You will have to show maximum patience, only then the result will please you.

Forget about blood pressure problems forever!

Most modern medications for hypertension do not cure, but only temporarily reduce high blood pressure. This is not bad, but patients are forced to take drugs for the rest of their lives, exposing their health to stress and danger. To remedy the situation, a drug was developed that treats the disease, not the symptoms.

Verticillin is a drug that was created from an entomopathogenic fungus. The mushroom, if it grows into the body of a whitefly, will kill it with its toxic substances.

What biological techniques are used to kill whiteflies?

This plant is native to Africa. Attracting the whitefly to itself, it will eat it, as the white pest will stick to its leaves.

Martinia fragrant (Harpagophytum procumbens (Burhc.) DS) is a plant that, due to its large hook-shaped fruit, is called “Devil’s Claw”. Synonyms: hooked plant, forest spider.

macrolophus;
encarsia;
Trihaporusi.

They are used both for preventive purposes and to reduce the number of white pests. The first species harms the whitefly in this way: they lay their eggs in the whitefly larvae, killing them in this way. The second species immediately eats the whitefly in its various stages of development.

Take 7 dandelions, separate the leaves and roots from them, cut them, pour 1 liter of boiling water over them. Spray the infusion on the cucumbers after 1.5 months.

If it is only the first stage of whitefly infestation, a garlic infusion will help: 100 g of garlic cloves are peeled, grated, passed through a garlic press, and 0.5 liters of boiling water is poured in. Leave for 4 days. Spray on plants based on the ratio: 5 grams of product per 1 liter of water.

An important point: in order for the mixture for spraying cucumbers to stick well to the leaves, you should pour a little liquid soap or shampoo into it. You can also use an adhesive - a special tool.

If a small number of these tiny pests are observed in the greenhouse, it is advisable to use sticky tapes and traps. They are sold in markets and stores.

You can make them yourself. A mixture consisting of wood ashes and shag is scattered near the roots of the plants, and mosquito repellent tablets are lit.

Photo: what a sprout fly looks like

Sprout fly: what harm it causes and how to get rid of it

Description

The sprout fly is distinguished by the fact that its larvae harm plants. The result of their activity is that crops are planted less frequently and seedlings die off. When sprouts and seeds have been damaged during transport, planting and other situations, the risk of them being susceptible to bacteria and pathogenic fungi increases.

The greatest damage is caused by larvae of the 1st generation. The next generations are no longer capable of causing such harm to plants, since the larvae, as a rule, harm adult, mature cucumbers.

Methods for eliminating the pest

It is very important to carry out the following actions in order to eliminate the fly and its larvae:
In the fall, it is necessary to dig up the soil very deeply, and most importantly, bury organic fertilizers (manure) there. If left on top of the soil, the pungent odor will help attract flies.

Weeds must be constantly combated. They must be removed from the area where cucumbers are planted.

Photo: Sprout flies gnaw through seeds and damage the sprouts of cucumber and other crops. In mid-spring - summer flies and the development cycle repeats.

Cucumber seeds should be planted in a timely manner. This will enable them to ascend quickly. Plants that have grown up are no longer of interest to flies.

Before sowing, the seeds must be treated using insecticides. Very effective, for example, “Fentiurama”. For 1 kg of seeds you need to take 3 g. For better fixation of this product on the seeds, the seeds are dipped in flour glue.

It is advisable to spray cucumber seedlings with Iskra. 1 tablet of this drug dissolves in 1 bucket of water.

Damage caused by slugs to cucumbers

Slugs are most active at night. This is their favorite time of day, when they can feast on cucumbers without fear of the sun's rays. Fruits suffer the most from them, since slugs prefer to eat the pulp out of them. They also harm the crop because traces of their dark droppings and mucus remain on the cucumbers.

How to deal with slugs in cucumber beds

An effective method is to sprinkle the soil with ash mixed with lime, digging the soil all the time;
The area must be kept clean. All plant residues must be promptly removed and burned.

Slugs love to hide. Why not use this to catch them? In the morning they will crawl under material, pieces of paper, boards, which in the evening will be prudently placed under cucumber bushes to attract them.

A flawless lawn at your dacha all summer long!

Nadezhda Nikolaevna, 49 years old. I have been planting grass near my house for many years. Therefore, we even have experience in this area. But my lawn has never looked as gorgeous as after using Aquagrazz! Like heaven and earth. The lawn is lush and dark green even in the heat. Requires minimal watering.

It is worth considering the use of chemicals when there are a huge number of slugs. To combat these pests, a product called metaldehyde 5% was created. If you treat the plants twice, you won’t even have to think about slugs. It is necessary to scatter granules over the soil. Slugs, having eaten the bait, will die.

The use of copper and iron sulfate, ground superphosphate, and lime fluff is effective. After it has rained, these products will not work, since these products are water-soluble

The number of shellfish in cucumber beds can be reduced by using their natural enemies. It is worth considering attracting brown frogs, legless lizards, toads and other lovers of slugs to help.

Birds are also partial to them. Slugs attract the appetite of starlings, hooded crows, blackbirds, magpies and other birds.

Photo: Slugs. Like mole crickets, slugs can be lured into bottle traps using beer

Funny pest - cucumber mosquito: control measures and prevention

Wherever this insect is found! Its name is very funny, but when it appears in the greenhouse and begins its activity, no one is laughing anymore!

It mainly kills weak plants suffering from diseases of the root system. The mosquito ends up under the film thanks to organic fertilizers, manure, and onion planting material.

Cucumbers suffer not from mosquitoes, but from their larvae.

Methods for killing mosquitoes on cucumbers:

It is necessary to plant cucumber seedlings only when they are healthy.

"Actellik", "Chlorophos" and "Iskra" are those insecticides that have proven their effectiveness. To make the solution, dilute 1 tablet in a 10-liter bucket of water. This bucket is enough to process 100 square meters. It wouldn’t hurt to thermally sterilize the soil.

Photo: Root-knot nematode. Do not plant onions next to cucumbers - the nematode settles on onions (they love onions and thrips), and will easily move from there to the cucumber plot.

Root nematode: what harm does it cause to cucumbers, description and methods of control

This is a worm 1.5 mm long. His favorite habitats are: greenhouses, greenhouses. Having penetrated the roots of the plant, the nematode settles there.

How to find out that cucumbers are infected with this pest

Innovative plant growth stimulator!

Increases seed germination by 50% in just one application. Customer reviews: Svetlana, 52 years old. Simply incredible fertilizer. We heard a lot about it, but when we tried it, we surprised ourselves and our neighbors. The tomato bushes grew from 90 to 140 tomatoes. There is no need to talk about zucchini and cucumbers: the harvest was collected in wheelbarrows. We have been dachaing all our lives, and we have never had such a harvest....

1. An infected cucumber bush lags behind similar ones in growth.
2. The harvest was obtained in a reduced volume.
3. You can observe that unsightly “bumps” have appeared on the roots - these are the places where nematode larvae mature.

What to do to destroy the worm on cucumbers:

It is difficult to eliminate a nematode if it has already appeared in the greenhouse. It is worth taking preventive actions:
In the garden bed, in open ground, where cucumbers grow, you need to plant cabbage and garlic. Weeds, every single one, must be destroyed so that the nematodes have nothing to eat.

Every season they change the place where the cucumbers were planted, that is, monitor crop rotation.

The soil is watered with boiling water. Then cover it with film for 2 or 3 hours.
As soon as pests that destroy cucumbers are discovered, the top layer of soil must be removed. As an option, the soil is frozen, but the worms may not die.

When individual roundworms become visible, it is imperative to dig up the infected cucumber bush, as well as the bushes on the right and left. The roots and soil should be treated with a 5% formaldehyde solution or 2% carbation. The soil is covered with polyethylene.

Video: Soda for diseases and pests of cucumbers

Oksana Baranova, especially for

When fully copying or partially using the material, an active link to the site is required!

In order for the cucumber harvest to meet expectations, you need to monitor the possible appearance of pests on the site, protecting the crops. Only high-quality processing of cucumbers will protect them from their main enemies and prevent the development of diseases that affect them. What pests are most often tempted by cucumbers and what methods of controlling them are known? More on this below.

A dangerous enemy - aphids: how to deal with them

You can notice the melon aphid on the plant when examining the leaves - the insect is camouflaged on the back of the leaf. If melon aphids have settled on cucumbers, then it will not be at all difficult to notice this by fallen leaves and a sharp decrease in the level of yield, up to the death of the plant in weather with high humidity levels.

The pest insect can be recognized by its characteristic oval body shape, dark green in color, up to 2 mm long. If these are females, then they are wingless; if they are larvae, then variants of individuals with wings and without green or yellow color are possible. Pests multiply in the spring when the air temperature reaches 12 degrees above zero. Each adult gnaws cucumber leaves, stems, and flowers. Up to 20 generations can appear in one season.

In order for the protection of cucumbers from melon aphids to produce results, you need to know about the methods used in pest control. These include:

Treating plants with water and soapy water or clean water under pressure (suitable for small numbers of insects).
Treatment with onion peel tincture or ash solution at intervals of 5 days.
Burning yellow cucumber vines in case of massive damage and treating the remaining plants with sulfur powder or karbofos.
Treatment with Iskra or Fitoverm with protection with plastic film for a day.
Planting plants that can repel pests: mint, mustard, garlic, coriander and others.
Introducing natural enemies of aphids - ladybugs - onto the site.

To avoid having to deal with pests frequently, it is important to follow the requirements for fertilizing cucumbers, watering them, and regularly weed the soil to get rid of weeds.

Spider mites - why are they dangerous and how to get rid of them?

Spider mites can be found on cucumbers more often than any other insect pests. It affects crops regardless of the region and climate where they are grown, both in open areas and in greenhouses. The mite latches on to the bottom of the crop leaf, drinking the juice and enveloping it in a web. The result of this proximity is the death of the leaf, and then the entire plant.

Pests of cucumbers (photos can be found below), such as spider mites, require a serious approach to destruction. Proven insecticides are suitable, as well as, in the absence of the possibility of using them, a soap solution for treating plants.

As an option, it is worth considering populating the area with the natural enemy of the tick - Phytoseiulus, which will cope with the eggs laid by the females. It needs to be restocked every few weeks.

Slugs - what harm do they cause and how to exterminate them?

At first glance, completely harmless slugs can actually cause the development of cucumber leaf disease and, as a consequence, a decrease in the quantity of the crop and its quality level. It is slugs that are carriers of fungal spores and a direct threat to crop infection with powdery mildew or gray rot.

Slugs appear in areas with favorable conditions for them:

humid climate;
abundance of weeds;
an abundance of emptiness.

To prevent cucumber pests from having time to harm them, it is better to plant crops in early spring, giving them the opportunity to grow stronger. After harvesting, it is important to remove all vegetation that insect pests could use as a food source.

If slugs have appeared on the site and are aimed at destroying cucumbers, you can fight them in the following ways:

Pick by hand with tweezers.
Create grooves in the area that complicate the movement of insects.
Use proven chemicals - metaldehyde, fluff lime, iron sulfate and others.
Attract frogs, toads and lizards for natural pest control.
Create favorable conditions for nesting birds of prey - starlings, blackbirds, magpies, etc.

Compliance with the rules regarding the care of the site and timely planting of crops will be a kind of guarantee that diseases and pests of cucumbers will not disrupt plans for the seasonal harvest.

Who are mole crickets and why are they dangerous?

The numerous number of enemies of cucumbers is also supplemented by mole crickets. We are talking about fairly large insects up to 5 cm in length. Harm is caused by both adults and larvae. Mole crickets gnaw through the plant in the area of the trunk and root system, multiply rapidly and are capable of invading the entire garden if cucumbers and other crops are not treated in a timely manner. You can fight mole crickets in the following ways:

Traps with manure on boards or plywood.
Traps baited with a mixture of hot pepper, water and honey.
Planting alder trees that repel pests.
Ready-made drugs - "Medvedko-s".

The latter option will require certain costs, but is a proven method, since insects die in just 2-3 hours after exposure to the drug.

How to deal with thrips on cucumbers?

If thrips appears on the site - a small pest that overwinters in the remains of plants and is capable of producing up to 7 generations of new individuals per season, then urgent measures must be taken. Both adults and larvae are extremely dangerous for vegetable crops, in particular cucumbers. Pests suck the juices from plants, as a result of which they change color and eventually die.

You need to fight thrips as follows:

Carefully remove plant debris after harvesting.
Dig up the soil in autumn and spring.
Disinfect the soil on the site after harvesting with karbofos and similar means.
Don’t forget to treat the seedlings with an infusion of hot pepper and water, infused for 24 hours with the addition of laundry soap.

When using solutions for treating plants, both purchased and prepared yourself, you must remember to repeat the procedure with an interval of no more than 5 days.

Cucumber mosquito - how does it attack plants and how to remove it?

When listing insects from the category of pests of cucumber seedlings, it is worth mentioning the cucumber mosquito. Most often it appears on plants affected by any diseases. Insects pose a serious threat to the roots and stems of cucumbers. Not only adult mosquitoes are considered dangerous, but also mosquito larvae that live in humus or manure.

The pest invasion occurs in mid-spring. It is at this time that females lay about 300 eggs at a time.

The larvae easily penetrate the root system of plants and cover the stem with numerous passages.

In this case, the protection of cucumbers will be based on the use of spraying preparations. One of the proven options is Iskra. The solution is prepared according to the instructions from one tablet diluted in 10 liters of water. This amount of solution is enough to treat up to 100 m2 of land.

Additionally, it will be necessary to thermally sterilize the soil.

Wireworm - how it harms cucumbers, methods of control

The wireworm is the larva of the click beetle. Its length is 5 cm, its habitat is cracks in the ground on the site. Beetles from the larvae will appear no earlier than after 3 years; until this moment, the larvae actively infect the stems of cucumbers, feeding on them from the inside.

An effective protection scheme against wireworms is based primarily on the mechanical method - manual collection of pests followed by digging up the ground. To prevent re-infection, after harvesting, all traces of plants are removed, liming and mineralization of the soil are carried out.

Specialized chemical insecticides will allow you to get rid of large numbers of larvae. Proven options are “Bazudin”, “Diazinon” and “Calypso”.

Root nematode - pest worm and methods of combating it

What pests and diseases of cucumbers are most common in a greenhouse? One of the worst enemies of greenhouse crops is the root-knot nematode. Only 1.5 mm long, it penetrates the root system of plants, settles in tissues and releases toxins leading to the formation of swellings and growths in which larvae appear and grow.

Affected plants grow worse and bear less fruit. The solution to the problem in greenhouses can be replacing the affected soil (at least 50 cm) with new one, or treating the soil with steam.

Sprout fly and whitefly - how to defeat and protect cucumbers?

Germ flies reach a length of no more than 5 mm, and when they enter an area, they lay eggs in the soil, from which larger larvae will eventually appear. They are the ones that infect crops, affecting seeds, shoots and stems from the inside.

The larvae eat the plant for two weeks, after which they pupate and give birth to a new generation. In one season, in this way, several generations of pests appear that negatively affect the harvest of cucumbers.

To prevent the sprout fly from harming crops, the following preventive measures should be taken:

Use only ready-made compost in the greenhouse.
Loosen the soil before use, plant the seeds after germination at a shallow depth.
Use growth stimulants for seeds.
Remove all crop and plant residues after harvesting cucumbers.

Another enemy of cucumbers is the barely noticeable white fly. The insect appears in the second half of summer, hatches larvae on the lower part of the plant leaf, which leads to their wilting. Tobacco dust, as well as red pepper and water, will help get rid of the pest. Among the proven drugs, it is worth highlighting “Fosbecid” and “Confidor”.

Cucumber beetles are rare but dangerous enemies

An overseas guest, the cucumber beetle is extremely dangerous for cucumbers, but is rarely found in the country. It is distinguished by stripes or spots of bright color on its back. The insect damages crops most often in the form of larvae. Plants first turn yellow and eventually wither. In addition, pests are carriers of diseases.

They need to be combated by disinfecting the soil with a solution of potassium permanganate, or mechanically, followed by the destruction of the beetles.

What other problems are there?

In addition to numerous diseases and pests, cucumbers may fail due to a fungal infection affecting the soil. Infection can be detected if the soil in the greenhouse is covered with a white coating - in the form of mold. The solution to the problem in this case will be the following drugs: “Fundazol”, “Hom”, “Fitosporin”. The preparations are added to the water during watering, after which the soil is loosened, leaving it to dry completely.

In conclusion, we note that it is possible to grow healthy vegetables, especially if these are rare medicinal orange cucumbers, but only if you follow the recommendations regarding soil and plant care with seasonal processing and disease prevention.

Root rot can cause cucumber leaves to turn yellow.

Anthracnose most often affects cucumbers in greenhouses and greenhouses. With this disease

The disease manifests itself most strongly at low temperatures, so in greenhouses and

greenhouses and greenhouses.

If the ovaries of cucumbers turn yellow, then this is bacteriosis

If it was not possible to avoid the appearance of root rot, it is necessary to rake off the soil and treat the damaged stem with a special medicine. To prepare it you will need 0.5 liters of water, half a teaspoon of the “Bud” preparation, 40 grams of copper oxychloride (Homa) and 3 tablespoons of wood ash. The finished mixture is applied to the plant using a brush. You can also get rid of root rot by dusting the diseased areas with chalk, coal or ash. Feeding plays an important role in getting rid of the disease.

Gray spots on cucumber leaves can be caused by a cucumber disease called gray rot.

Preparing the soil in the greenhouse before planting. This is the most expensive and complex process, but in the future you will not have to poison the crop with pesticides

Ascochyta disease is why cucumbers turn yellow and why cucumber leaves turn yellow

You can also apply chalk, coal or ash to sore spots.

Sclerotinia or white rot

To avoid problems in the future, be sure to treat the seeds. Such products as “Gamair” and “Alirin-B” are suitable

The disease is caused by the bacterium Pseudomonas lachrymans. If angular spots appear on the leaves of plants, and brown sores are present on the cotyledons, this is bacteriosis. Over time, infected tissues become brown in color and holes may form on the leaves.

Other fungal diseases of cucumbers in open ground: spotted blight, cladosporiosis

Mulch (straw, leaves, sawdust) reduces moisture loss, improves soil aeration and promotes better and more uniform heating

Growing cucumbers in the garden is much simpler than growing cucumbers in a greenhouse. When choosing a location, it is important to remember two things: predecessors and lighting. It is fundamentally important to observe crop rotation - if melons, watermelons or cucumbers have been grown on the site for the past 2-3 years, cucumbers cannot be replanted in this place. It is advisable that the sun illuminates the selected bed as best as possible, although cucumbers will produce a harvest in partial shade.

Photo gallery of diseased cucumbers (click to enlarge):

udec.ru

Growing cucumbers in open ground - grow, cucumber, big and small!

Growing cucumbers in a summer cottage - choosing a place

At various stages of development, vegetables are susceptible to dangerous diseases. As a result of the defeat, the cucumbers turn yellow, spots appear on the leaves of the cucumbers, the plants weaken and even die.

Yellow, sometimes quite large, spots appear on the leaves, which in wet weather become covered with a pinkish coating. The same spots, but depressed, in the form of ulcers, can appear on fruits, stems and leaf cuttings.
Greenhouses should increase the temperature and also reduce the air humidity.
Powdery mildew is also found in open ground. Leaves affected by this disease become covered

This disease is also known as bacteriosis. Its appearance causes damage to fruits and embryonic leaves. The main sign of bacteriosis is the presence of watery spots, which dry out over time and turn brown. The tissue on the leaves begins to crumble, which leads to the formation of holes, and subsequently drying of the leaves.

The fight against cucumber diseases is a whole “epic” of consistent actions aimed, first of all, at preventing the occurrence of infections. It is better to treat the soil, seeds and seedlings in advance than to poison the almost finished crop with pesticides. This material will help in the fight against tomato diseases in the greenhouse.

Garden and vegetable garden - growing cucumbers with maximum benefit

When watering, make sure that water only gets on the ground.

The fight against penorosporosis is carried out as follows:

The disease also affects fruits. A characteristic property of damage to the fruit is the presence of ulcers, it seems that the cucumber was pecked by birds.

Growing cucumbers in the garden - watering

. In addition, it is important to lightly hill up the seedlings so that moisture does not linger under them - this will prevent the occurrence of diseases. When 5-6 leaves appear on the stem, it should be pinched to stimulate the development of new shoots. This technique allows you to significantly increase productivity.

Planting cucumbers in open ground This disease of cucumbers appears when the soil temperature drops sharply and when watering at cold temperatures. If you use soil in which pumpkin crops have previously been grown, the risk of the disease increases. Root rot can also occur if planting is done incorrectly. If it is not clear why the leaves of cucumbers turn yellow, then you should pay attention to whether there is premature wilting and cracks on the lower part of the stem. If these signs are detected, then this may be an infection with root rot.The disease develops most strongly at high temperatures and humidity.

Growing cucumbers in open ground - preventing diseases

White rot (sclerotinia) of cucumbers.

mainly on the upper side with whitish spots, similar to powdery plaque. This is where the name of the disease comes from. To combat angular spotting, gardeners spray cucumbers with “Hom”, and the procedure begins almost 3 weeks after the seeds germinate. If bacteriosis develops rapidly, it is necessary to stop watering the cucumbers and only lightly moisten the soil. Attention, only TODAY!

nasotke.ru

Diseases of cucumbers in a greenhouse: types, methods of control and prevention

Dead, infected plants must be removed, and the places where they were located are recommended to be treated with a solution of copper sulfate.

To begin with, you should reduce watering and fertilizing for a week.

In order to prevent the occurrence of disease, you should start from seeds. Don't forget to leave them in a solution of zinc sulfate for a day. Next, the planting material must be dried and you can plant. Treatment of cotyledons and leaves with Bordeaux mixture gives a good effect.

Types of cucumber diseases

Failure to observe crop rotation can lead to sudden withering of seemingly healthy plants. The risk of disease can be reduced by annually treating the seeds in a solution of potassium permanganate at the germination stage. However, this does not always help - fungal diseases await plants in the soil. Often we ourselves become the reason for their appearance - either we were too lazy to heat the water in the sun, or we added fertilizer with pathogens.

Watering cucumbers in open ground

Bacteriosis of cucumber

To prevent disease, you must strictly follow the rules for planting seedlings. You should not hill the stems too high.

The presence of droplets of liquid water on plants promotes the germination of spores. Anthracnose spreads easily through watering and sprinkling (spores are splashed with water).

This disease affects a number of vegetable crops. In greenhouses, cucumbers are affected mainly by

To combat powdery mildew, use colloidal sulfur (25 grams per 10 liters)

Downy mildew

Bacteriosis on cucumber leaves.

To get a rich harvest of cucumbers, you need to know not only the peculiarities of growing this crop, but also diseases that can greatly harm the plant, thereby destroying the entire crop. Knowing about the dangers that arise when growing vegetable crops and methods to combat them, you can avoid crop losses. As they say, informed means armed.

When planting cucumbers, only a nutrient pot is placed in the hole. The stem of the plant is not touched; hilling is not carried out

Root rot

Means such as a mixture of disinfectants, fungicides and insecticides are used. You can choose such options as Actellik, Bayleton, Farmayod-3. Checkers “Face” and “Climate” give a good effect

The most common diseases are root rot, bacteriosis, gray rot, ascochyta blight, and white rot. When the first symptoms appear on leaves, stems, fruits or ovaries, it is necessary to take action as quickly as possible.

Growing dill in open ground

Diseases of greenhouse cucumbers (video)

If the disease has been detected, then the soil is raked from the stem to the very roots. And they are treated with a solution of copper sulfate, polycarbacin or copper oxychloride. Plants that have died from the disease should be dug up and burned. The soil from them is treated with a solution of copper sulfate.

Treatment options

To prevent disease, cucumber seeds are pickled in sublimate. When appearing

like a stem. It turns white and becomes soft.
water). You can pollinate cucumbers with sulfur, spray with ISO lime-sulfur decoction. Some varieties of cucumbers do not tolerate sulfur well (Non-bearing).
Bacteriosis mainly affects the leaves of cucumbers and less the fruits. On the leaves
This disease damages shoots, flowers, ovaries and leaves. In addition, the appearance of melon aphids on cucumbers leads to wrinkling and curling. As a rule, this pest appears on plants in mid-summer.
How to prevent diseases of cucumbers from making themselves felt? Use biological products! To begin with, the treatment of old, fruit-bearing plants is carried out. Products used include a mixture of disinfectants, fungicides and insecticides. You can choose such options as Actellik, Bayleton, Farmayod-3. Checkers “Face” and “Climate” give a good effect.

Then the greenhouse is ventilated, and the cucumbers are covered with film at night.

This is one of the most common diseases of cucumbers in the greenhouse. Its main danger is that it can appear at any stage of plant development. However, downy mildew most often occurs in August, during fruiting. The disease persists on the soil for a long period - up to 7 years.

In most cases, a solution of copper sulfate helps prevent fungal diseases.
We recommend that you read
Gardeners often encounter cucumber ovaries turning yellow or even rotting. The reason for this may be a cucumber disease such as bacteriosis. Its spread is facilitated by high soil or air humidity.
Plant diseases are sprayed with a 1% solution of Bordeaux mixture or lime-sulfur decoction; You can also pollinate cucumbers with AB.
Inside the stem, mycelium and sclerotia of the fungus develop in the form of black nodules.

Powdery mildew affects cucumbers mainly in protected soil. Spraying and

Preventive measures

angular, grayish-white, oily spots appear, limited by leaf veins. Then the affected areas of the leaves fall out and the leaves become perforated.
When cucumbers are affected by melon aphids, the main thing is to detect the pests in a timely manner, since the disease develops at a rapid pace. Initially, damage appears yellowish in color, and then dark green. In just a couple of days, aphids can damage the entire lower part of leaves and flowers.
The question arises: is it advisable to treat plants that are already going to be thrown away? The answer is yes, because if you skip this step, pathogenic bacteria and viruses will find a way to fly to new seedlings. You will also have to remove plant debris from the greenhouse and disinfect all parts of the greenhouse structure. It is necessary to carry out a complex of autumn work in the greenhouse, the most important of which is thorough disinfection of the internal space of the greenhouse.
Spraying with a solution of copper sulfate also gives good results. After the harvest is harvested, the soil in the beds is also treated with a solution of copper sulfate.
Main signs: the leaves turn brown and large oily spots form on them. The main reason for the occurrence of this cucumber disease is a sudden change in temperature or watering with cold water.
, which is sprinkled on plantings. Affected stems should be removed and burned.

The garden bed needs to be well fertilized. Since the root system of cucumbers is small, fertilizers can be applied pointwise, directly into the plant holes. Compost, when decomposed, will provide a lot of heat, thereby accelerating the growth of seeds, and the nutrients will last until autumn. It should be applied to a depth of about half a meter. The bed should be dug up in the fall; if the soil is heavy, add sand - cucumbers love it.

At low night temperatures, with poor ventilation and when watering with cold water, gray spots may appear on the leaves of cucumbers, in the axils of the leaves and on the stems. These are signs of gray rot. To prevent it from forming, it is necessary to prevent the plants from becoming too crowded, not to water them with cold water, and to ventilate the room frequently.

After the end of the culture, all remains of the affected plants must be removed from the

Sclerotinia often affects parsley and celery when they are forced onto greens in protected ground.

MoyaTeplica.ru

Diseases of cucumbers in open ground and their control

Pollination should begin selectively, at the first appearance of the disease on individual plants. After 4-5 days, the treatment is repeated.

melon aphid

To combat bacteriosis, you need to treat cucumber seeds and follow the correct

To combat the disease, it is necessary to destroy all weeds on the site, since aphids come to cucumbers from them. In addition, the cucumbers will need to be sprayed with red pepper infusion. To prepare it, you will need 30 grams of fresh capsicum and 200 grams of a tobacco-colored powdered preparation made from waste from tobacco factories (per 10 liters of water). All this is diluted in water heated to 60°C and left to infuse for a day. The infusion is well stirred and filtered, after which soap (1 tablespoon) and wood ash (3 tablespoons) are added.

Untreated seeds are also a risk factor! In this case, infections arise that quickly move into the soil. As a result, we have withered leaves, spoiled fruits and loss of a significant part of the harvest. To avoid problems in the future, be sure to treat the seeds. Such products as “Gamair” and “Alirin-B” are suitable.

When planting plants for the next year, you should not place cucumbers in the places where pumpkin, cucumbers, squash and zucchini were previously located.

Anthracnose of cucumbers

Any summer resident dreams of a rich and healthy harvest of cucumbers

Preventive measures

Root rot

At first, the soil around the cucumber plantings will stand idle, so you can freely plant lettuce or radishes. These plants produce a quick harvest, just in time for the cucumbers to begin to grow. It is also recommended to plant corn at a two-meter distance from the cucumber bed - in summer its stems will serve as good protection from the scorching sun and wind.

This disease affects leaves, stems and fruits. First, large yellow spots appear, then they are replaced by gray ones. Afterwards, black dots appear on the plant. In case of damage, it is necessary to spray with Bordeaux mixture. If it is not clear why cucumbers turn yellow, then it is worth examining the fruits for signs of ascochyta blight.

Corner spot

greenhouses and greenhouses were burned, and cultivation premises were disinfected. In open ground, it is necessary to do deep autumn plowing and not grow cucumbers, watermelons and melons in this place for 2-3 years.

If sclerotinia was observed on parsley and celery, then when planting cucumbers after them

green-color.ru

Diseases of cucumbers in open and protected ground

Brown (green) spotting of cucumbers.

crop rotation, remove and destroy plant debris.

The prepared solution should be enough for 5-10 square meters, depending on the number of aphids. Spraying is carried out within one week.

It is not enough to take care of the seeds; seedlings also need care. This means that before planting the seed, you should put a gliocladin tablet in the soil. As a result, a fungus, or rather its mycelium, will develop along with the plant, which will easily crowd out all microbes and infections. The use of biological products at the stage of growing seedlings will protect cucumbers from the disease “root rot.”

Already with the appearance of the first shoots, every summer resident has to fight various plant diseases

Often the disease occurs due to the fact that the cucumbers were planted incorrectly - they were severely damaged in the ground. Among other things, the disease occurs on those soils where cucumbers have been planted for more than one year.

Already with the appearance of the first shoots, every summer resident has to fight various plant diseases. In such a closed space as a greenhouse, pests and viruses feel even better than in open ground. Here, optimal living conditions have been created for them, and in view of this, it will not be easy to fight. Before you start the battle, you should carefully read the information on the topic of “cucumber diseases.”

Growing cucumbers in your summer cottage should begin when the risk of frost has passed. It is recommended to germinate cucumber seeds.

It affects all organs - petioles, fruits, leaves, tendrils, stems. A white coating forms on the tissues, after which they soften and rot. First, white and then black fruiting bodies appear on the affected areas. They are called sclerotia. They are the cause of infection. Sclerotia overwinter in the soil. When the air or soil is too wet, rot will spread. The affected areas should be sprinkled with fluff lime or charcoal.

Return to

The land should be changed.

The disease appears on cucumber fruits in the form of dark spots and individual ulcers. On

When bacteriosis appears, plants are sprayed with a 1% solution of Bordeaux

Anthracnose is a fungal disease. As a rule, adult plants are infected, although young seedlings may also be affected. Most often, the disease manifests itself in the second half of summer. The presence of oval spots of yellow or brown color, lighter in the middle, is the main sign of anthracnose. Cracks usually appear at the spots, and ulcers appear on the stem and fruit. This disease leads to the death of parts that have been infected and rotting of the fruit.

The next stage is preparing the soil in the greenhouse before planting the plants. This is the most expensive and complex process, but in the future you will not have to poison the crop with pesticides. After soil disinfection, beneficial microflora should be introduced. And again mushrooms will help, more precisely, the drug “Trichotsin”. It is applied in two ways: watering the soil or spraying. The principle of operation of the product is simple - the soil fungus fills the free space and does not give pathogens even hope of appearing.

Root rot can be treated using the following methods:

The cause of the disease can also be improper watering - too cold water.

It is better to treat the soil, seeds and seedlings in advance than to poison the almost finished crop with pesticides

To do this, lay them out on wet sawdust or a clean cloth and cover with another layer. In a day or two, the root will appear, and when its length is equal to half the length of the seed, you should start planting. Prepare shallow holes – 2-3 cm deep. You can make one common trench with a hoe, but the cucumbers should be planted at a distance of 15-20 cm. When the seedlings appear, they should be thinned out - the plants grow very quickly, so you can safely leave half a meter between them.

Plants are most often susceptible during the fruiting period. The formation of rot can also be caused by temperature changes and thickened plantings. It is imperative to alternate cultures. Sprinkle stems with signs of damage with lime. The affected parts must be cut out, partially including healthy tissue. If the infection is very widespread, it is better to remove the sheets during hot hours - this way the wounds will dry out faster. The sections are sprinkled with crushed coal or wiped with a solution of copper sulfate. Provide regular ventilation. Watering is carried out in the evening with warm water. You can try feeding. For ten liters of water, use ten grams of urea, one gram of zinc sulfate and two grams of copper sulfate.

top of page

When white rot appears on cucumbers, remove the affected parts of the plants, and if

The affected areas sometimes secrete cell sap, which turns into a gelatinous mass. In some cases, distortion of the fruits is also observed. The disease affects cucumbers in the field, greenhouses and greenhouses.

liquids. Spraying is repeated after 4-5 days.

When the first signs of a fungal disease appear, cucumbers should be sprayed with Bordeaux mixture, copper oxychloride or cuproxate. After 20 days, improvements will be visible. All leaves that have been infected must be removed, and healthy ones should be sprayed with a solution of potassium permanganate, pollinated with ash and fed with potassium-based fertilizer.

Particular attention should be paid to cucumbers during the growing season. As soon as the seedlings enter the greenhouse, they initially experience severe stress. Therefore, it is worth paying attention to it and supporting the plant’s immunity to the best of your ability.

When planting cucumbers, only a nutrient pot is placed in the hole. The stem of the plant is not touched; hilling is not carried out.

How to recognize root rot? The leaves of the plant are withering; if you remove the soil and look at the roots, you will notice that they have turned yellow and cracks have appeared on them.

Most summer residents know how to grow a good harvest of cucumbers in a greenhouse, creating optimal conditions for growth and development for the crop. The priority task of lovers of fresh home-grown vegetables should be not only timely watering, weeding, fertilizing and maintaining temperature conditions, but also protecting their “wards” from diseases:

Cucumbers love generous watering. It is important to use well-heated water and water strictly at the root, without irrigating the foliage. Cold water will significantly slow down plant growth. If you skip watering even once, the cucumbers may become bitter. Weeding and loosening of the soil should be carried out as long as the growing fences allow it.

Anthracnose or spot burn is characterized by light brown spots that have an irregular shape. As a result of the damage, the fruits do not grow to the required size, and in severe cases they disappear.

Return - to table of contents -

severe disease - even whole plants, while also taking over part of the soil around them. The places where the plants were removed should be sprinkled with freshly slaked lime, mixing it with the soil.

The main means of combating brown spot, repeated every 8-10 days, is

Powdery mildew on cucumbers.

The cause of the development of root rot can be unfavorable conditions during the growth period, as well as fruiting. At this time, plants are very sensitive to temperature conditions. If the temperature goes beyond 18-28°C, rot will soon begin to appear on the cucumbers. You should not grow vegetables in the same place, as the number of pests in the soil increases and the risk of disease development increases.

If the disease has already appeared, use a mixture of a teaspoon of copper sulfate, half a liter of water, 3 tbsp. spoons of chalk, wood ash. The affected parts of the stem are treated with the presented mixture.

Untreated seeds are also a risk factor! In this case, infections occur that quickly move into the soil

How to prevent diseases of cucumbers from making themselves felt? Use biological products!

It wouldn’t hurt to mulch the beds -

The next fungal disease of cucumbers in open ground is olive spot or cladosporiosis. First, an olive coating appears on the plant, then the tissues become depleted and crumble. Then spots appear on the fruits. You can look at photos of cucumber diseases to better recognize cladosporiosis.

Literature

Anthracnose (scarden) of cucumbers.

Spraying plants with a 1% solution of Bordeaux mixture.

bestgardener.ru

Powdery mildew is one of the most dangerous and common diseases of cucumbers in

Large tomatoes for open ground Radish varieties for open ground

Every gardener who has decided to plant greenhouse cucumbers hopes for large shoots of an environmentally friendly product, but unfortunately, expectations do not always live up to reality. The question: “why do cucumber leaves have holes, spots or mold” worries every novice gardener. To understand this, it is worth studying in more detail various fungal diseases of cucumbers and methods of treating them.

The greenhouse may meet all the necessary requirements, watering is done in a timely manner and in the right quantity, the percentage of seed germination corresponds to the norm, but the results still leave much to be desired. The greenhouse creates optimal conditions for the germination of not only garden crops, but also harmful microorganisms, bacterial flora and pests that expose plants to various diseases.

Phytodiseases are the main problem when growing greenhouse cucumbers. All kinds of infections cause maximum damage to cucumbers. In greenhouse conditions there are approximately twenty species.

A greenhouse is an ideal environment for the development of pathogenic microflora and therefore it is important to know how to quickly and effectively eliminate the disease, without harm to the plants.

The appearance of spots and holes on the leaves of seedlings

In industrial production, agronomists can accurately determine the type of disease by the appearance of holey leaves and prescribe the necessary drugs for treatment. However, in garden conditions it is not possible to carry out laboratory testing of a perforated sheet, so a different approach is used.

The point is not to miss the moment when the disease has not yet reached the terminal stage (a small number of spots) and immediately move on to actively combating the disease using folk remedies.

It is quite effective to spray a mixture of ash and lime on the leaves. This treatment will neutralize fungal microflora.

This effective remedy will help with the initial stage of the disease. If there are a large number of holes on the leaf blade, leaves with small holes should be removed in order to avoid the subsequent spread of the disease.

How to plant cucumbers

Sowing of cucumbers begins on the twentieth of May, regardless of the place of sowing. This crop from the pumpkin family develops well in warm conditions, but requires increased attention. A gardener with many years of experience can immediately identify any problems that have arisen. But what should novice gardeners do?

As practice shows, on the first sunny days, gardeners sow cucumbers for the first time, and then are surprised at the large percentage of dissimilarity of the seeds. The reason lies in the night temperature. Crops made in early spring are covered with holes.

It is necessary to take measurements of the soil temperature, as well as create a reliable shelter for the plant. If you want to get early fruits, you should plant the crop in separate containers so as not to disturb the root system during transplantation. Plants with damaged roots do not take root for a long time, they often get sick or even die.

Causes of defects on plant leaves

The appearance of spots and holes on the leaves is the most common problem with greenhouse cucumbers. The reason lies in the following: due to closed conditions and high humidity, dew forms in the greenhouse, as a result, the leaves of the cucumbers become covered with dew. During the daytime, a lens effect is created in the drop and the sun's rays burn the plant (this is how holes are formed).

Powdery mildew and downy mildew

Often, fungal diseases develop due to increased spores on the leaves of the plant. If a plaque appears on the cucumber in the form of small round spots, a number of measures are taken to treat powdery mildew. When the first holes appear on a plant leaf, they are dusted with ash and germinate. Powdery mildew is treated with a weak solution of colloidal sulfur or mullein in a proportion of 40 grams per 10 liters of water. This is the most effective remedy for treating plants with holey leaves.

Important: in advanced cases, experts recommend using HOMom.

At low night temperatures, holes may appear on the leaves of cucumbers; any gardener should know what to do in such cases. At the same time, the number of spots is constantly growing, and they change their color to dark brown. After this, a gray coating forms on the underside of the leaf and the plant dies. This disease is called downy mildew or downy mildew. To treat downy mildew, it is worth reducing watering and fertilizing the plant, ventilating the greenhouse and treating the leaves with a special milk solution.

Olive spot

If the above signs appear on cucumbers, then you should immediately begin treatment for olive spot. Cucumber leaves should be treated for olive spot by regularly airing and removing leaves in holes.

Gray rot

This disease often appears in mid-July. Its main symptom is the appearance of mucus on the stems and petioles of leaves.

The method of dealing with gray mold is quite simple:

It is necessary to prepare a special mixture consisting of chalk and potassium permanganate diluted in water;
Clean the affected area from accumulated mucus;
Treat the affected area with the mixture.

Causes of disease development

Cucumbers are more susceptible to diseases on loamy and podzolic soils. Temperature also plays an important role. The range should be between 14 and 28 degrees Celsius. Deviations in one direction or another have negative consequences for the germination of greenhouse cucumbers. In turn, watering should be uniform, and the water for irrigation should not be too cold.

How to deal with holes

Industrial agricultural complexes use various chemicals and special steaming technology as methods of combating diseases. However, these methods are not possible in garden conditions.

Advice from an experienced gardener: the number of infected plants in a greenhouse is significantly reduced with regular ventilation. It is just a myth that tropical plants require a special atmosphere and do not tolerate drafts.

For plants, the only danger is the draft that enters the bathhouse atmosphere. Bath air should not be allowed to form in the greenhouse. Let there be a light sunny breeze in the greenhouse. The sooner you ventilate the greenhouse, the better: this will save the plants from the effect of drafts and the appearance of fungi and rot.

First of all, it is necessary to open the upper doors of the greenhouse, then the doors, so that ventilation occurs more evenly (from top to bottom). It is most effective to carry out this procedure in the morning, when the air is saturated with energy and freshness. The morning sun has always been considered the most effective helper of the harvest. In the morning at 7-8 o'clock the bees are already working with all their might.

That is why this is the best time to treat leaves with holes in plants and grow seedlings. If you take care of the plant later, there is a high probability that the cucumbers will become infected with various fungal diseases and the harvest will be small.

Preventive methods of control

Every day, early in the morning, it is necessary to inspect the greenhouses, check cucumber plants, treat wounds, and remove mustaches. It is recommended to treat all damage (holes and spots on a cucumber leaf) with a mixture of water, chalk and potassium permanganate.

When does a cucumber sprout fastest? In the evening, when solar activity decreases, the greenhouse should be packed and all doors and window openings tightly closed. Thus, warm air remains in the greenhouse throughout the night (this is the optimal time for cucumber germination).

At the end of August, the length of night time increases and the temperature decreases. That is why increased attention and care of plants is necessary at this time, since it is during this period that rot and various fungal diseases can appear.