Methods for the treatment of powdery mildew on cucumbers. How to get rid of powdery mildew on cucumbers

One of the most common diseases in cucumbers is powdery mildew. This disease is dangerous in that it can deprive the gardener of half the harvest. Especially if you do not start treatment on time.

The appearance of powdery mildew on cucumbers can be immediately noticed. These are small, rounded white or reddish spots on the underside of the leaves, which are located close to the ground. At the same time, the bases of the shoots are covered with the same bloom.

The area of \u200b\u200bthe spots increases rapidly. And soon a fluffy grayish or white bloom covers the entire leaf, gradually affecting the entire plant. The whole lash seems to be dusted with flour.

If you look closely, you can find the spores of the fungus - these are small balls brown color... As they ripen, moisture appears on the white bloom, which looks like dew.

Cucumbers growing in a greenhouse are more susceptible to disease powdery mildewthan those that grow on the street. This is because in closed ground a humid microclimate is created, which contributes to the spread of fungal infection.

Powdery mildew development cycle

The fungus lives in plant debris left in the garden in the fall. In the spring, he wakes up and at first takes over the leaves of the weeds.

Powdery mildew spores can develop if:

Summers are rainy and cold with sharp temperature changes.
The plantings of cucumbers are so thick that there is no air circulation between them. In this case, the mycelium can easily migrate to other plants due to their proximity.
The earth is alkaline or contains excess nitrogen.
Watering is done too often when the soil is still wet. The situation is aggravated if used cold water.
Weeds have not been removed in the garden bed. Powdery mildew spores from grass are transferred to new cucumber lashes.

The fungus develops almost instantly:

The time from the moment the fungus hits the leaves of the cucumber to the disease of the plant is from 3 to 7 days.
The period depends on the humidity of the air: the higher it is, the faster the spores germinate.
At first, the lower leaves suffer, especially those that touch the soil. Then the disease spreads to leaf stalks, stems, fruits.
Over time, the spots grow, merging with each other. The plaque becomes denser and turns brown.
Leaves become loose, curl and dry out. Photosynthesis is disrupted, due to which the cucumber cannot fully eat.
The fungus spreads to the fruits, which rot and crack.
The tips of the shoots are curved. Scourges dry, darken and die off.

Favorable conditions for the life of fungi - light warmth (+16 - + 20 ° C) and dampness. In such an atmosphere, they quickly multiply, managing to give life to several generations in a season.

How to deal with powdery mildew on cucumbers

The main thing is to constantly monitor the condition of the cucumber leaves. If you take measures to combat powdery mildew on cucumbers when the first spots appear, the crop can still be saved.

The fight is to destroy the mycelium (the body of the fungus) and its spores. Therefore, the first infected whip must be removed and burned along with the roots.

The plantings must be weeded out immediately, and, if necessary, thinned out.

If white bloom appears on several shoots only on lower leaves, they must be carefully cut to the very stem and burned. It is best to remove any foliage that looks weakened. After that, the cut is treated with Trichodermin paste.

Then all the cucumbers are sprayed with fungicides ( chemical method) or fermentation products (bacterial method).

Finished preparations

Industry produces effective drugs to fight fungal infection. But, using them, you need to reckon with the fact that cucumbers after treatment with them long time cannot be eaten. Therefore, such substances are best used before the flowering period, or, in extreme cases, during its time.

At the very beginning of the disease with powdery mildew and for prevention, cucumbers are processed:

bordeaux liquid (a teaspoon in a bucket of water);
colloidal sulfur (sulfaride);
Ridomil Gold;
"Oxyhom";
"Tiovitom Jet".

They block the spread of fungus and are harmless to the plant means:

"Fundazol" or its analogue "Fundazim";
Topsin-M;
"Title KE";
Alirin-B;
"Gamair";
Fitosporin.

Modern fungicides with protective action:

"Privent";
"Cumulus";
"Kuproksat";
Bayleton;
"Caratan EC".

Sulfur preparations are good for the destruction of pathogens of powdery mildew. But they can burn the leaves of the cucumber if the concentration of the solution is exceeded.

Fungicides on a cucumber garden are used in dosage, because they accumulate in all parts of the vegetable. An excessive amount of the substance will lead to the fact that the concentration of pesticides in the fruit will be exceeded.

After using most drugs, a break of at least 20 days is required from the moment of processing to eating the fruits.

In addition, such substances inhibit the growth of not only harmful fungi, but also the development of the plants themselves. As a result, less ovaries are formed, the yield is reduced.

Folk remedies

Traditional methods to combat powdery mildew, they are good because they can be used all season. They do not harm the plants and are safe for the operator. After spraying natural remedies the fruits can be consumed immediately.

You can make a powdery mildew remedy using chemicals:

Potassium permanganate - 1 gram per bucket of water.
Silicate glue (sodium silicate) - 30 ml per bucket. A protective film forms on the surface of the sheet. It can be mixed with fungicides or applied alone. But together with growth regulators, it can provoke the death of cucumber plantings.
Colloidal sulfur - 40 grams per 10 liters of liquid. This solution is used for infection with powdery mildew spores on cucumbers in a greenhouse. On the open ground, the concentration of the mixture is 2 times less. The solution is not stored, it is used immediately. Air temperature - from +25 to + 35 ° C.
Ground sulfur - 30 g is scattered on 10 m2 of soil.
Copper sulfate - 80 g per bucket of liquid. Add 50 g of soda ash.

Other formulations with soda:

Soda ash - 1 part, laundry soap - 1 part.
Drinking soda - 5 g, water - 1 liter. Add the grated soap. You need to spray at least four times.
Baking soda and soap, taken in equal parts. Spray daily for a week.
Destroys powdery mildew and iodine: milk - 1 liter, iodine - 10 drops, warm water - a bucket.

Laundry soap infusions:

Liquid soap - 5 g, soda ash - 25 g, boiling water - 5 liters. Stir well, cool. Spray 3 times: on the first day, on the second, then on the seventh day after re-treatment.
Ash - 1 kg, water - a bucket. Insist for 7 days. A small amount of grated soap is added just before spraying.
Soap - 5 g, ash - 150 g, boiling water - 1 liter. Insist 2 days.

Sour dairy products work very effectively against fungi on cucumbers. They form protective film on the surface of the leaves. The acidic environment that is created on cucumbers inhibits the growth of bacteria.

Spraying solutions with fermented milk products:

Milk whey - 1 part, cold water - 10 parts.
Milk whey - 3 l, copper sulfate - 1 tsp, water - a bucket.
Kefir and liquid in arbitrary proportions.

The development of powdery mildew also stops under the influence of plant infusions, especially those fermented:

Chopped garlic - 50 g, cold water - 2 liters. Insist day, strain.
Fill the nettle without seeds (fill the container halfway) with liquid, leaving about 10 cm to the brim for fermentation. Insist 2 weeks. Dilute with water 1:20.
Horsetail - 1 kg, water - a bucket. Withstand a day. Then boil for about two hours. You can use it within seven days. Before use, dilute 1: 5.
Marigolds - 1/2 bucket. Warm water is a bucket. Insist, strain. Add laundry soap - 50 g.
Any weed is half a bucket hot water - to the brim. Insist a week, strain.
Plantain, celandine, dandelion, mother and stepmother, chop wood lice, grind, pour a bucket hot water... Withstand 2 days. Strain, add 1 tbsp. l. liquid soap and 1 tbsp. l. urea. Spray twice at weekly intervals.

Very effective against powdery mildew treatment with manure and mullein:

Rotten manure - bucket, water 5 buckets. Insist 5 days, strain, dilute 1: 3. You need to spray cucumbers three times, taking a week break.
Manure - 1 part, water - 3 parts. Withstand 4 days, strain, dilute 1:10 with water.
Overripe mullein - 1 part, water - 3 parts. Insist 3 days. Dilute with water 1: 2.
Liquid mullein - 1 liter, water - bucket, urea - 1 tbsp. l. Insist 2 days.

Spraying with manure not only removes powdery mildew from cucumbers, but also nourishes them.

Cucumbers are processed on a warm, windless evening, trying to rinse both sides of the leaves with a solution.

What to do for prevention

Observing the rules of agricultural technology for growing cucumbers, you can protect them from infection with powdery mildew. So, you need to make sure that there are no plants within a radius of 20 m that are sick with this fungus.

Basic rules for the prevention of powdery mildew on cucumbers:

Cucumbers can be planted in the old place only after 3 years. You should not choose places in lowlands and in the shade for beds. The soil in the area where the cucumbers are planted is periodically loosened. After harvesting, you need to completely clear the planting site of plant debris and weeds, and water the ground with a solution of potassium permanganate.
Seeds are pre-treated with hot water (+ 55 ° C) or special means: "Trichodermin", "Grandsil". Seeds or seedlings are placed in soil warmed up to + 12 ° C.
The temperature must be monitored in the greenhouse. During the day it should be about + 20 ° C, but not higher than + 30 ° C, at night - + 17 ° C.
When watering, the drops should not fall on the leaves and stems. Sprinkle with water no colder than + 20 ° C.
In order for cucumbers to grow strong and can withstand powdery mildew pathogens, they need to be fertilized. A bucket of liquid requires 6 g ammonium nitrate, 10 g of urea, 8 g of potassium chloride, 10 g of superphosphate.

To prevent infection with powdery mildew, planting cucumbers is treated with the following compounds:

Copper sulfate - 5 g, soap - 50 g, water - 5 l. Cucumbers are sprayed 2 times, taking a break of 7 days.
Mustard powder - 2 tbsp l., warm water - a bucket. It is used for watering.

Ready-made preparations "Topaz", "Quadris", "Planriz" and "Strobi" can be used to treat powdery mildew on cucumbers, but they are more effective in preventing the disease. They can be sprayed with seedlings, which have 5 leaves each. Before flowering, processing is carried out every 2 weeks.

Powdery Mildew Resistant Varieties

Breeders have developed many varieties that successfully resist powdery mildew pathogens. These are mainly hybrids.

Place of cultivation
Open ground	April Gourmet Erofey	Competitor Swallow Lord	Goosebump Pasamonte Semcross
Open ground and greenhouse	Alexeyevich Annika Benefit Darling Debut Zodiac Katyusha	Connie Idol Adam Masha Ant Nezhinsky Octopus	Ofix Pasadena Fontanelle Company's secret Son of the regiment Phoenix Photon
Protected ground	Alliance Regatta	Stroma Mascot	Tournament Ryabinushka

It should be noted that powdery mildew fungi mutate and become increasingly resistant to the effects of industrial insecticides on them. Therefore, it becomes preferable to grow varieties and hybrids that do not suffer from this disease.

Want to ? Then you should be able to recognize their diseases at a very early stage of development and know how to deal with them.

After all, the sooner you discover the first signs of the disease and can recognize it, the sooner it will be eliminated. We will discuss the signs of the most common diseases, methods of their prevention and "first aid" for plants.

Powdery mildew

Problem

Has a white (less often slightly reddish) powdery coating in the form of small spots appeared on the leaves or stems of cucumbers? Over time, the plaque does not go away, but spreads to the entire leaf, after which it begins to turn yellow and gradually dry? This is a mushroom disease of cucumbers. Its consequence is the premature drying of the leaves and the termination of fruiting.

Powdery mildew on cucumber leaves. Photo from mrjacksfarm.com

Pathogens that hibernate on organic debris spread especially quickly in cloudy and cool weather. If the average daily temperature rises above +18 ... + 20 ° C, powdery mildew stops developing.

The disease most often affects plants that are "overfed", as well as those that are watered irregularly and insufficiently.

How to warn

To prevent the occurrence of powdery mildew, you must:

observe - do not plant cucumbers in one place for several years in a row. Remember: the cucumber can be returned to its original place no earlier than after 4 years;
timely remove from the beds not only cucumbers, but also all plant residues;
disinfect hotbeds and greenhouses immediately after harvest. For this, you can use, for example, a formalin solution;
raise the temperature to +23 ... + 25 ° С, simply closing the greenhouse at night or covering the plants with a film;
water the plants only with warm water;
cultivate powdery mildew resistant hybrids.

Articles will help you choose the right varieties:

Ambulance

As soon as you notice the first signs of powdery mildew, spray the plants immediately, for example with topsin. Or treat them with a solution of the TOPAZ preparation, for the preparation of which mix 2 ml of the preparation with 10 l of warm water. Spraying is carried out in calm dry weather, both for the prevention of the disease, and at the first signs of its appearance.

Nice results in the fight against powdery mildew gives the treatment of plants with a preparation "HOM" (copper oxychloride solution)... To prepare the solution, take 40 g of powder and dilute it in 10 liters of water. Spray the plants using 1 liter of the resulting solution per 10 m².

Plants can be processed colloidal sulfurusing a 20% solution in open ground (20 g of colloidal sulfur for 10 liters of water), and a 40% solution for protected ground (40 g of colloidal sulfur for 10 liters of water). With the resulting solution, process the leaves of the plant in cloudy weather at both sides.

If the use of chemicals on summer cottage you consider unacceptable, try to cope with the disease using folk methods of dealing with powdery mildew.

Spray the plants with mullein infusion: mix 1 kg of raw materials with 3 liters of water; insist 3 days; strain the infusion, mix it with 3 l pure water and spray the plants.
Mix 1 L sour milk with 1 liter of warm water. Strain the solution and spray it on the plants once a week.
Dissolve 50 g of baking soda and 50 g laundry soap in 10 liters of warm water. Spray cucumbers with this solution every 5-7 days.

Downy mildew - downy mildew

Problem

Have small but numerous light yellow spots appeared on the leaves of cucumbers? A week passed - the spots increased in size, and the leaves themselves turned brown and began to dry out? This means that cucumbers are infected with downy mildew, or - a very dangerous and widespread disease that can affect plants at any stage of their development.

Downy mildew - Peronosporosis.Photo from the site greentalk.ru

Possible causes of occurrence

The cause of the disease is a fungus that develops rapidly when high humidity... Watering the plant can also provoke its growth. cold water.

How to warn

Observe agricultural practices: do not thicken the crops, maintain crop rotation, harvest the fruits in a timely manner and do not water the plants with cold water.

Ambulance

Having found the first signs of the disease, stop watering and feeding. To stop the spread of downy mildew, treat the plants with a warm (about + 25 ° C) solution of polycarbacin, copper oxychloride or (mix 100 g each copper sulfate and freshly slaked lime with 10 liters of warm (about + 25 ° C) water).

Also, to combat downy mildew, drugs "Ordan" and "Ridomil" are used. After processing the plants, try to keep the temperature inside the greenhouse or greenhouse from falling below + 25 ° C. If you grow your cucumbers outdoors, just cover them with plastic overnight.

To prevent the occurrence of downy mildew, it is useful to periodically treat the plants with a solution of whey.

Cladosporium - brown olive spot

Problem

Fruits and stems of the plant are covered with small rounded ulcers of green-brown or olive color, which literally on the third day darken and increase significantly in size? Are rounded or angular specks appeared on the leaves of cucumbers, which are destroyed when dried? This is cladosporium disease, or, as this fungal disease is also called, brown olive spot.

Cladosporium is a brown olive spot. Photo from the site kartinohigh.ru

Cladosporia develops rapidly in cool, rainy weather and with sudden changes in temperature. In hot summers, brown olive mottling appears already at the end of the growing season - when the nights become cool, a large amount of dew falls. The infection spreads with rain, wind, water during irrigation and remains for a long time not only on plant residues, but also in the soil.

Possible reasons emergence
The source of infection of plants with cladosporium is plant residues - or rather, spores of the fungus, the causative agent of the disease, wintering on them.

How to warn

To avoid contamination of plants with cladosporia, you must:

air the greenhouse in a timely manner;
remove all plant residues from the beds in time;
do not water cucumbers with cold water by sprinkling.

Ambulance

As soon as you notice the first signs of cladosporia:

stop watering the plants for 4-5 days;
if the average daily temperature drops below + 18 ° С, try to raise the temperature to at least + 20 ° С - for example, closing greenhouses at night and covering plants in the ground with a film;
treat the plants with 1% solution, 0.4% copper oxychloride solution, "Fundazol" or a solution based on the drug "Oxyhom", for the preparation of which mix 20 g of the drug with 10 liters of warm water.

Sclerotinia - white rot

Problem

Initially, multiple bodies appear on all affected areas of the plant. whitethat become dark over time, all the way to black? Then the leaves, stems and even the fruits of the plant become covered with a solid white bloom, lick, soften and rot? This is sclerotinia, which is more commonly called white rot.

Sclerotinia is a white rot. Photo from the site fr.academic.ru

Possible causes of occurrence

The source of the disease is sclerotia - fungi that winter in the soil and spread quickly when the soil is waterlogged and the air is too humid.

How to warn

To prevent the occurrence of sclerotinia:

do not thicken the crops of cucumbers;
observe the crop rotation - do not sow cucumbers in the same place earlier than after 4 years; be sure to alternate between different cultures;
remove plant residues from the beds in a timely manner.

Ambulance

First of all, cut out the parts of plants affected by sclerotinia to healthy tissue, and process the sections themselves with lime or crushed charcoal... If the disease is severe, remove all infected plant parts or plants completely.

Feed the cucumbers with a nutrient solution consisting of 10 liters of warm water, 10 g of urea and 1 g of zinc sulfate and copper sulfate.

Gray rot

Problem

Are the leaves, stems or even flowers of cucumbers covered with brown, vague, watery, quickly merging spots with a smoky gray bloom? This is manifested by gray rot - a bacterial disease that affects all parts of the plant.

Gray rot. Photo from the site apsnet.org

Possible causes of occurrence

The main reasons for the development of gray rot are waterlogging and low temperatures.

How to warn

For the prevention of gray rot:

do not thicken the crops of cucumbers and observe the crop rotation;
promptly remove plant debris from the beds, on which the infection persists;
take protective measures in a timely manner.

Ambulance

If the disease has just begun to spread, treat the affected areas with a fungicide, for example, Rovral paste, which includes contact preparations against gray rot, or Bayleton. Remove affected fruits, leaves and stems of the plant immediately.

Root rot

Problem

Cucumber leaves began to wither, withering more and more every day, and gradually dry up? Do roots of a plucked plant look rotten and rusty? This means that plants are infected with root rot - one of the most common and dangerous diseases.

Possible causes of occurrence

The development of root rot is caused by unfavorable conditions during the growth and fruiting of plants. In particular, we are talking about excessively high temperatures and insufficient or excessive watering, especially cold watering.

How to warn

You can prevent the appearance of root rot of a cucumber if:

observe crop rotation and not thicken crops;
remove plant residues from the beds;
do not water the plants with cold water and, for prevention, treat them with Previkur's solution every 2 weeks.

Ambulance

Once you find your plants are infected with root rot, the first thing to do is to stimulate the formation of new roots. To do this, sprinkle a five-centimeter layer of fertile soil around the plants. This will give them the opportunity to put down new roots. Alternatively, trim off the leaves from the bottom of the stem and lay it in a layer of fertile soil. Literally in 7-10 days, additional roots will grow on the buried shoot. All this time, water the plants only with warm water and not at the root.

If you were able to detect the disease only when the plant has already dried up, you will not be able to save it - just dig it up together with the soil, filling it with a new hole in the formed hole fertile soil... After cleaning diseased plants and soil, it is necessary to wash the entire tool in a strong soapy solution.

Anthracnose (copperhead)

Problem

Do you have numerous brown spots on the leaves, stems and even fruits? The affected leaves began to dry out gradually, and the fruits became covered with wet sores? It is not so difficult to recognize the disease - the plants are infected with anthracnose or, as it is often called, copperhead.

Anthracnose (copperhead). Photo from the site 693437.ucoz.ru

Possible causes of occurrence

Copperhead is most often caused by infected seeds that were collected from diseased plants, or a fungus that persists in the upper layer of the soil and plant debris. In addition, irrigation of plants with cold water and sudden changes in temperature contribute to the rapid spread of the disease.

How to warn

To prevent the occurrence of anthracnose, you must:

observe crop rotation and do not return cucumbers to their original place earlier than after 4 years;
timely remove plant residues from the beds and process the soil with high quality.

Ambulance

To defeat anthracnose, you must:

once a week before harvesting, spray the crops with a 1% Bordeaux mixture;
thoroughly treat all affected areas with a solution of copper sulfate (0.5%), then sprinkle with lime or coal.

Why do cucumber leaves turn yellow?

Most likely, the reason lies in the temperature difference between day and night and (or) lack. And if in order to raise the night temperature, it is enough just to cover the cucumbers at night with any covering material - film, spunbond, etc. - then to cope with the second problem, you need to make a little more effort.

Cucumber leaves turn yellow prematurely. Photo from the site sazenec.ru

Spray the plants infusion of ash... To prepare such an infusion, dissolve 3 tablespoons of ash in 1 liter of warm water and let it brew for 2 days.

It will be useful to feed the cucumbers onion infusion... To prepare it, take a metal bucket, pour 10 liters of warm water into it and, adding 50 g (about 2 tablespoons) onion peel, bring the contents to a boil. Let it brew. When the onion infusion becomes barely warm, water the plants with it, spending 1 liter of infusion per 1 bush.

Also, when growing cucumbers, you may encounter another problem: their stems crack. Why is this happening and how to cope with the problem, you will find out by reading the discussion of the post Why does the stem of cucumbers and zucchini crack?

How do you fight the most common cucumber diseases? Tell us what secrets and tricks you know, and how do you achieve success in this difficult task?

Growing various agricultural crops, gardeners are often faced with various diseases plants that negatively affect the harvest. Powdery mildew on cucumbers is a common agricultural disease that affects plants. There are many ways to cope with the disease, but the most effective is the prevention of powdery mildew.

Powdery mildew is a vegetable fungus that affects the stems and leaves. Mushrooms colonize plant epithelium cells and promote the formation of mycelium - this is a white bloom. The incubation period of fungi lasts from 3 to 5 days.

Favorable conditions for the appearance of powdery mildew are abundant humidity and warm weather. If in summer, in warm weather, there were prolonged rains for several days in a row, then after a few days you can notice a white bloom, and then yellowed leaves.

The most favorable temperature ranges from +16 to +22 degrees. It also requires a large amount of sunlight... Sudden changes in temperature during the night and during the day weaken the immunity of cucumbers, which contributes to the rapid infection with powdery mildew.

In addition, powdery mildew appears when:

Heavily thickened plantings of vegetables;
Large amount of nitrogen in the soil;
Overdrying or vice versa, overflowing the soil;
Watering the beds when upper layer the soil has not yet dried out.

The damaged plant looks like this:

A white fluffy bloom appears in the form of spots on the leaves and stems of cucumbers;
Withering leaves;
Decreased productivity;
The leaves become curled and then begin to fall off.

For the treatment of powdery mildew on cucumbers, you can use folk methods that are not inferior in effectiveness chemicals... They are also safer.

Prevention of cucumber diseases

Most effective method coping with diseases of vegetables is prevention. It is enough to follow the simple rules for growing and caring for cucumbers and you will never have to treat plants for powdery mildew. It will take much less time for preventive actions than for the fight against an already emerging disease.

For planting, you need to choose only high-quality seeds. Before sowing in the soil, they must be disinfected.
Before planting, both seeds and seedlings in the soil, you need to ensure that the soil is warmed up. The minimum soil temperature should be +12 - +16 degrees.
Seedlings should be planted in pre-prepared soil. The soil is carefully dug up, all weeds are removed and watered with a solution of potassium permanganate. Then they are mixed with manure and only then the seedlings are planted.
All plant residues after harvesting are burned away from the site.
It is recommended to choose those cucumber seeds on which disease resistance is indicated.
The beds are weeded regularly. Weeds not only prevent vegetables from growing, but they also transmit disease.
Diseased leaves should be disposed of immediately so that the fungus does not spread further. They should be removed as soon as possible.
Regular fertilization. Top dressing should be applied several times per season.
It is important not to forget about crop rotation. Each year, the place for sowing cucumbers should be changed. This will prevent powdery mildew from re-infesting the vegetables. If the soil was contaminated, then in such places it is necessary to plant crops that are immune to powdery mildew.

Ways to prevent illness are always the most effective method to preserve the harvest.

How to deal with powdery mildew with folk methods

You can meet powdery mildew not only on cucumbers, but also on other vegetables. Most often it affects leaves, less often stems, roots and fruits. Immediately after the first signs of powdery mildew appear, measures should be taken to treat cucumbers. For this you can use folk remedies.

Measures to combat powdery mildew on cucumbers:

Soap solution and wood ash

Cucumbers can be cured with laundry soap and ash. Grate the soap and mix with 200 gr. wood ash. Pour warm water over everything and mix thoroughly to dissolve the soap. Process the bushes 3 times a week.

Powdery Mildew Soda

You can cure powdery mildew from cucumbers with soda. You need to take 100 gr. soda, 75 gr. vitriol and 10 liters of water. Stir all ingredients and process cucumbers. Watering with soda liquid is necessary first of all on the foliage.

Garlic

How to deal with powdery mildew on cucumbers with garlic? Chop the garlic cloves together with the herbs and add water. Leave to infuse for 12 hours. Then spray the cucumber leaves for two weeks. Infusion can also be watered part of the land where cucumbers grow.

Mullein

On cucumbers, the fight against powdery mildew can be carried out with the help of a rotted mullein. Using this remedy, cucumbers can be protected from death. 1 part mullein should be mixed with 3 equal parts water. The mullein should be infused for 3 days. Bushes can be processed both in the open field and in a greenhouse.

Kefir

If you do not start to treat cucumbers in time, they will turn yellow very quickly. Kefir is used to save the leaves (you can even take an expired one). The foliage is watered with kefir every 3 days.

Potassium permanganate

If the cucumbers have a white bloom, then potassium permanganate will help to cope with it. 2 gr. Dilute potassium permanganate in 10 liters of warm water. Sprinkle the cucumbers with the resulting solution for 2 weeks. If the plaque does not disappear, then spraying can be continued.

Chemical preparations for cucumbers

In order to get rid of powdery mildew, a large number of chemicals have been created. The remedies can be purchased at any gardening store.

IN recent times biofungicidal preparations are gaining popularity. They are safe and non-toxic. Biofungicides can be used even during the formation of ovaries and fruits. Negative consequences human health will not be affected.

What drugs help get rid of powdery mildew:

Fitosporin

Fitosporin is one of the most popular remedies used to combat vegetable diseases. Fitosporin contains biofungicides, which are based on bacteria. It is with their help that the use of the Fitosporin drug slows down the growth of mycelium of fungi.

Topaz

If the yellowing of the leaves has begun, then Topaz is used. Get rid of powdery mildew with this remedy for one week. But it is worth remembering that Topaz is toxic to humans, so it is better not to touch cucumbers during the treatment. The active ingredient is penconazole. Only one ampoule is required for 10 liters of water. You can spray the foliage on the cucumbers with a freshly prepared solution. Pour the residues after spraying. The foliage should be sprayed every two weeks.

Tilt KE

Tilt KE will help to get rid of powdery mildew. Suitable for greenhouse spraying. The active substance of this drug is propiconazole, which inhibits the formation of fungal spores. Available in the form of an emulsion. An increase in temperature enhances the action of the active components of Tilt CE. To protect plants from the harmful effects of fungi, it penetrates directly into the tissues. For 10 liters of water, you need to take 40 grams. facilities. A few hours after spraying, a protective layer appears on the plants. It lasts more than two weeks.

How to deal with downy mildew

In addition to powdery mildew, there is also downy mildew. The disease also affects mainly the leaves. The main difference between these two diseases is that with downy mildew, the leaves turn immediately yellow, and white bloom can not be.

If the leaves begin to turn yellow on the beds, then you should immediately take action. Practice shows that it is much more difficult to get rid of downy mildew.

Factors that can provoke the appearance this disease crops are:

Watering with ice water;
Warm and humid air;
Improper plant care.

You can save the crop using the following measures:

Air the part of the greenhouse where cucumbers grow;
Do not water the beds with cold water;
Harvest periodically.

How to treat cucumbers with downy mildew

For treatment, you can use the same methods as when dealing with a previous disease. You can also spray the beds with drugs such as:

Ridomil;
Cuproxat;
Oxyhom.

To combat fungi, folk remedies are used. They are highly effective and non-toxic to humans.

One of the most common plagues is powdery mildew on cucumbers, which leads to the rapid wilting of the leaves. The bushes become unable to feed the fruits, and the harvest drops significantly. In order not to part with the result of labor, summer residents provide plants with optimal conditions for keeping. And if the symptoms have already manifested themselves, then they immediately begin treatment.

Signs of damage to cucumbers with powdery mildew

The first symptoms of powdery mildew are white or light gray bloomresembling flour. These are the mycelium and spores of the settled fungus. First, the plaque covers the entire surface of the leaf, then it thickens and turns black. As a result, the leaves dry out, shriveling and curling. The ends of the shoots become crooked. With extensive damage, the entire bush dies.

Powdery mildew usually attacks the lower leaves that touch the ground first. If you do not take action, then the disease spreads to the upper part of the bush. Until the fungus has reached the fruits, they can be harvested healthy. If the cucumbers are already infected, then they will not be stored - if they do not rot, they will crack.

Reasons for spread

Fungal spores live in soil for up to 6 years. Therefore, powdery mildew of cucumbers develops more often when crop rotation is not observed. You cannot plant pumpkin seeds on the same site for at least 6 years. But a small amount of the mushroom can live in other garden beds. If his dispute is small, then the disease develops only under favorable conditions:

Cold (below 20 degrees);
Watering with cold water or heavy cold rain;
Excessive air and soil moisture;
Failure to comply with the planting interval (bushes sit densely);
Excess nitrogen in the soil.

Cucumbers are especially susceptible to powdery mildew in the open field, if there is no protection from cold rains. People say that it is from "acidic" water. But in fact, plants are harmful low temperatures... That is why the fungus often covers the bushes in August, when it is still hot in the sun, but it is already very cold without it.

Ways to fight

Controlling powdery mildew on cucumbers includes three types of measures:

Prevention;
Treatment with folk methods;
Treatment with chemicals.

When choosing methods, it is not only your choice that matters, but also the timing. While there is no illness, prevention is needed. If started - treatment. Traditional methods will help with a small lesion, and chemical methods - with an extensive one. If the fruits are already ripening, then the treatment of cucumbers from powdery mildew with chemicals is unacceptable. Therefore, you will again have to turn to folk tricks.

Preventive measures

Prevention begins with the choice of a variety. You need powdery mildew-resistant cucumbers:

Aquarius (this is a variety, only hybrids are on the list below);
Farmer F1;
Saltan F1;
Emerald F1;
Mazay F1;
F1 evenings near Moscow;
Loyal friends of F1.

Others preventive measures powdery mildew are:

Presowing seed treatment;
Watering with settled warm water;
Compliance with the principle of crop rotation;
Careful use of nitrogen fertilizers;
Exclusion of temperatures below 20 degrees;
After harvesting the last crop - destruction of plant residues by burning.

Attention! Even if the cucumbers grow in a greenhouse, powdery mildew fungus can strike them from the low temperature at night, when it is only 1-2 degrees higher than outside. Therefore, the plants are additionally covered. In Japan, it is very popular to grow vegetables in tunnels located inside one large greenhouse.

Popular ways of fighting

Alternative treatment of cucumbers for powdery mildew is effective at the initial stage of the reproduction of the fungus. And this is the only acceptable method of struggle if fruits are already ripening on the bushes. Use any of the methods you like:

Spraying with horsetail decoction. 1 kg of fresh grass or 10 times less dry, pour water over the wind and leave for a day. Then set on fire and boil for no more than 100-120 minutes. Then cool. You can store it for 7 days. For spraying, dilute the broth with warm water: 1 liter of broth for 5 liters of water;
Spraying with marigold infusion. Grind flowering bushesto make 5 liters of raw material. Put them in a bucket and cover with warm water. The infusion is prepared for 2 days. Before using it, filter it and dilute 40 g of laundry soap in it;
Spraying with mullein solution. Take 3 parts of water for 1 part of manure. Insist for 3 days. Before use, 1 part of the infusion is diluted in 2-3 parts of water and the resulting solution is filtered.

Spraying for prevention is better than treating powdery mildew on cucumbers. Therefore, herbal remedies can be used without symptoms after every cold rain and more often. Since the ingredients used in traditional methods do not have a negative effect on plants, they can be used very often.

Use of drugs

Effective preparations for powdery mildew on cucumbers:

Topaz;
Fundazol;
Speed;
Tiovit;
Gamair;
Fundazim;
Bayleton.

Attention! Before treating cucumbers for powdery mildew, read the instructions for the preparation chosen for this purpose: they need to be diluted and sprayed according to it. And due to the fact that the fungus develops resistance to chemicals, change them regularly. Otherwise, the cucumbers will receive a portion of chemistry, but the disease will not recede.

Signs of damage to cucumbers with downy mildew

Downy mildew appears on cucumbers with the following symptoms:

On the lower surface of the leaf, a gray bloom with a purple tint is formed;
Oily spots of angular or angular form are formed on the upper surface of the leaf round shape light green with a yellow tint;
Over time, the spots grow larger and begin to cover the entire surface of the leaves;
Each infected leaf becomes brown and brittle. As a result, the leaves crumble, exposing the stalks.

The difference between downy mildew and simple mildew is the color and nature of the spots formed. With a simple mealy, the leaves look like they are sprinkled with flour. The spots are small, white. With false powdery, the leaves look like sunburnt from dew droplets. But each of the diseases is equally dangerous for cucumbers - if left untreated, the bushes die.

Reasons for the spread of downy mildew

The appearance of downy mildew is associated with the active reproduction of certain fungi that live in the soil. There they can remain viable for up to 6 years. Favorable factors for fungal growth are:

Waterlogged air;
Frequent rainfall;
Thick fogs;
Morning dew;
Lack of natural ventilation;
Growing cucumbers in the shade.

A good factor for the development of false mealy on cucumbers is a large temperature difference between day and night. A difference of more than 10 degrees leads to complete saturation of the air with water vapor. Humidity reaches 100%, and condensation - dew - collects on the leaves. Therefore, cucumbers need good shelter or heating at night.

Control measures

While the cucumbers have not yet been struck by false mealy, they carry out disease prevention. This will keep the harvest whole and healthy. Alternative methods of struggle are suitable for eliminating the first symptoms and extensive lesions, if the fruits have already set. The use of chemicals is permissible only before the start of fruiting.

Preventive actions

It is easier to prevent the development of downy mildew than to treat cucumbers and put up with the consequences of the disease. For this:

Water only with warm water and only in the morning, so that the air humidity has time to drop before the nighttime cold snap;
Try to keep the temperature even day and night, without sudden changes. During the day, the temperature is good about 25 degrees, and at night 18-21;
Follow the principles of crop rotation;
Ventilate the greenhouse frequently.

One of the measures for the prevention of false mealy on cucumbers is the selection of varieties that are resistant to this fungus. But the most resistant to it are hybrids: Anyuta F1, Delpina F1 and Vicenta F1. If your choice nevertheless fell on varietal plants, then be sure to soak the collected seeds before sowing in a dark solution of potassium permanganate for disinfection.

Popular ways of fighting

Over the centuries, the people have accumulated knowledge of how to deal with downy mildew. Suitable recipes:

Garlic broth. For a bucket of water, 75 g of finely chopped garlic or arrows. The cooled broth is sprayed on the bushes;
Milk iodine solution. Dissolve 1 liter of milk with zero fat content in 9 liters of water. Add 10 to 12 drops of iodine (5% alcohol solution). This composition is suitable for spraying;
Ash tea. Brew 0.5-0.6 liters of ash in 3 liters of boiling water. Bring the cooled "tea" to a volume of 10 liters. Now the composition is ready for spraying cucumbers.

You can spray cucumber bushes against downy mildew at any time and with any frequency. For diseased plants, the more often the better. But allow for this clear weather without wind, so that the effect of the procedure is maximum. Can be sprayed for preventive purposes.

Use of chemicals

You can use chemicals and biochemicals even at the preparation stage seed material to sowing. This is better than treating downy mildew on cucumbers, which always causes crop losses:

Gamair;
Adirin-B;
Fitosporin-M.

In a fungicide solution, cucumber seeds, for the prevention of downy mildew, must be kept for 100-120 minutes. After the procedure, the seeds are rinsed under running water and dried. Then you can sow them on seedlings or in open ground... Consumption for liquids is 1.5 liters per 1 kg of seed.

During the growth of the stem, to combat downy powder on cucumbers, you need to spray the bushes with one of the drugs:

Vitaplan (consumption - 2-3 liters per are, frequency - 2-3 weeks);
Fitosporin-M (consumption - 10 liters per are, frequency - 1.5-2 weeks);
Proton Extra (consumption - 10 liters per hundred square meters, frequency - 1-1.5 weeks);
Profit Gold (consumption - 5 liters per hundred square meters, frequency - 1-2 weeks);
Gamair (consumption - 10 liters per are, frequency - 2 weeks).

After using chemicals to treat cucumbers for downy mildew, the condition of the plants may deteriorate. To keep them viable, test the solution on a few bushes first. If they do not get worse in a day, feel free to spray the product throughout the plantation.

If your cucumbers do not produce every year due to the defeat of the garden with simple or downy mildew, do not neglect chemicals even during the period of ovaries and fruiting. You will not be able to harvest for at least a week, because it will be inedible. But this way you will be able to enjoy the fruits for the rest of the season.

Like powdery mildew. This is a fairly common virus that, unfortunately, many have to fight. In our article, we will take a closer look at what powdery mildew is, why it appears on it and what measures exist to combat it.

Why is powdery mildew dangerous?

First of all, it is worth determining that powdery mildew is fungal disease ... That is, it actively thrives in cold and damp conditions. It is dangerous because the infected plant, in addition to losing its decorative view, loses all vitality: it ceases to grow and develop, it and its shoots quickly wither, dry up and die, and the fruits turn black and rot. If the spread of the virus is not noticed in time and the spread of the virus is not stopped, it very quickly attacks everything, and getting even a minimal harvest becomes unlikely.

Signs of appearance on cucumbers

Infection usually occurs at the beginning, when the heat is replaced by rain and a sharp cold snap. The first sign of this defeat will be the appearance of a white or yellowish bloom on the lower leaves and on the bases of the shoots of the plant.

You can also see small brown balls (spores) on the greenery. After these spores mature, droplets of moisture are formed on the surface of the plaque - this explains the name "powdery mildew".

In advanced cases, the plaque becomes very dense and takes on a brown tint. It rises from below and attacks the entire plant as a whole - its stems, cuttings, leaves, stalks and fruits. The plant becomes lethargic and painful.

Did you know? Powdery mildew is a versatile fungus that attacks not only, but also many other plants, such as bread and many others. Breeders around the world are actively working to develop new varieties of these plants that are resistant to this disease.

Control measures

There are many ways how to deal with powdery mildew on. But the main thing is to remember that regular thorough examination makes it possible to detect an infection in time, which means that you have more chances to completely defeat the disease and save the crop.

Preventive and agrotechnical techniques

The first thing to do to prevent this fungus on yours is to observe. It is necessary to regularly change the places for sowing the same crops, since over time in one area there is a high probability of the multiplication of viruses and diseases typical for a particular plant.
and phosphorus fertilizers increase resistance to this disease.
Each one should make a deep digging of the beds with the removal of all residues and.
To prevent powdery mildew on cucumbers, you should carefully monitor the maintenance optimal humidity and temperatures of 23-25 \u200b\u200bdegrees.
The first coated stems and leaves must be uprooted and burned immediately.
Sowing resistant and immune to this virus hybrids will minimize your chances of "acquaintance" with it.

Folk remedies

One of the most effective for powdery mildew is considered to be the affected beds diluted. Manure is diluted one to three with water, infused for two days, once again diluted three times, filtered and is ready to use.
You can also use an infusion. To prepare it, you need to pour half a bucket of chopped flowers with warm water for two days. After that, 40-50 g of laundry soap is added to the strained infusion and the diseased plants are treated.
Horsetail, namely its decoction, is also a very popular remedy for this fungus. For 1 kg of fresh or 100 g of dry horsetail, 10 liters of water are needed. Pour the herb for a day, boil for two hours, cool and strain, dilute the finished broth again in a ratio of 1: 5. This "medicine" can be stored for up to a week.
If you dilute 1.5 g of potassium permanganate in 10 liters of water, you get good mix for the treatment of coated powdery mildew.
You can even use regular kefir. It must be diluted with water and sprayed with diseased plants.
In a liter of water, you can dilute soda ash with laundry soap in a 1: 1 ratio. The resulting solution can be sprayed on the affected stems.
For 150 g of ash - a liter of boiling water and a little laundry soap. Insist the solution for two days, strain and irrigate infected cucumbers with it.

Biofungicides

When deciding how to get rid of powdery mildew in their beds, many choose the method of using biofungicides... it biological productsused to fight fungus. Their undoubted plus is safety and non-toxicity. They can be used even at the time of fruit formation, which is very useful when it comes to infecting such vegetable crops, as .

The most popular means are: "Planriz", "Pseudobacterin-2",