Powdery mildew (spheroteca). How to ensure quality control of powdery mildew How to treat powdery mildew plants

Powdery mildew can be found on many plant species, both outdoors and in closed ground. IN room conditions Powdery mildew can be found on roses, gerberas, cineraria, Kalanchoe, begonias, cissus, and violets. The cause of the disease is stagnant wet air and sudden fluctuations in room temperature.

Powdery mildew spreads when a diseased plant comes into contact with a healthy one, during watering, and is carried by insects or air flow. Treatment of powdery mildew should begin as early as possible.

Causes of powdery mildew on indoor plants

First of all, this is due to stagnant, humid air in the room and sharp temperature fluctuations. The spread of the disease also occurs through contact between sick and healthy plants, during watering, with air flow, and also when carried by insects.

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The cause of the development of the disease can be excessive use of nitrogen fertilizers, as well as a lack of calcium in combination with high temperature and indoor humidity. At the same time, abundant watering is not at all a reason for the development of powdery mildew.

Signs of damage to indoor plants by powdery mildew

Gradually, the whiteness takes over the stems and other parts of the indoor plant. Over time, the spots increase in size, the mycelium thickens (becomes felt), the plaque darkens and acquires a brownish color.

It should be noted that flowers can also be affected by downy mildew (downy mildew), external signs which are similar to real underwear. But, unlike real mildew, downy mildew in the form of a coating appears only on the underside of the leaf blade, then the spots turn yellow, increase in size and then acquire a brownish color.

Folk remedies for combating powdery mildew on indoor plants

There are many folk remedies for powdery mildew that are safe for humans and plants. For example:

soap-soda solution: dissolve 50 g of ash or soda in 10 liters of water baking soda and 20 g of liquid or grated soap and treat the plants at least twice at weekly intervals;
whey solution: pour 1 liter of whey into 10 liters of water, stir and apply three times in dry weather with an interval of 3 days;
kefir solution: stir 1 liter of fermented kefir or yogurt in 10 liters of water and treat the plants three times with an interval of three days;
decoction horsetail: Pour 100 g of horsetail with one liter of water, leave for a day, boil over low heat for two hours, cool, strain, dilute with water 1:5 and carry out 3-4 treatments at intervals of five days. Undiluted, the decoction is stored in a cool, dark place for about a week;
mustard solution: dilute 2 tablespoons of mustard powder in 10 liters warm water and spray or water the plants;
potassium permanganate solution: dissolve 5 g of potassium permanganate in 10 liters of water. This solution stops the development of the disease and washes away the fungus from the fruit;
ash solution: add 1 kg of wood ash to 10 liters of water, stir, leave for 7 days, carefully drain, dissolve 20 g of liquid or grated soap in the infusion and treat the plants with this composition every other day;
garlic infusion: 50 g of garlic pulp (crushed cloves and shoots of garlic) are poured with two liters of water, infused for two days and filtered. Use the infusion undiluted;
infusion onion peel: 200 g of husk is poured into 10 liters of boiling water, left for two days, filtered and sprayed on the plants before flowering, after it and before leaf fall.

Special chemical preparations for powdery mildew on indoor plants

If powdery mildew appears on your flowers, combating it is most effective with the help of modern fungicidal agents. They have a detrimental effect on the fungus, stop harmful processes in plant cells, protect and treat it. Spraying is carried out 1-4 times with an interval of 7-10 days (depending on the chosen drug).

Articles for flower growers

The most effective drugs for powdery mildew:

Fundazol;
Topaz;
Acrobat MC;
Previkur;
Speed;
Vitaros;
Amistar extra.

A well-known fungicidal drug is phytosporin, the active ingredient of which is a concentrate of the bacteria Bacillus subtilis in a powder of chalk and humates. Despite the fact that phytosporin is considered a medicinal agent, it is practically useless against existing powdery mildew. However, as prophylactic, will operate flawlessly.

Prevention of powdery mildew on indoor plants

Like most other plant diseases, powdery mildew is easier to prevent than to cure. Therefore, prevention is the first remedy against such a fungus. And any prevention is, first of all, correct agricultural technology. To minimize the risk of infection you should:

- regularly thin out plantings;
- remove old leaves in contact with the ground;
- water the plants only after upper layer the earth will dry completely;
— do not abuse nitrogen fertilizers;
— carry out phosphorus-potassium fertilizing on time.

Another type of prevention against powdery mildew can be carried out in early spring, before the leaves bloom. Berry bushes and other perennials are simply scalded with boiling water. This must be done quickly, using a watering can with a diffuser. You should pour over all the branches as a whole, without lingering long in one place.

A short-term exposure to very hot water does not have time to harm plants that have not yet fully awakened after winter. But spores, mycelium, as well as pathogens of other diseases, die. A jet of steam under pressure produced using a household steam cleaner has a similar effect.

Powdery mildew is fungal disease which can take up to 70% of your harvest. The disease is also known as ash and white. When a leaf is damaged, it forms white coating a spore that forms small droplets when the mycelium matures. This is how the name Powdery Mildew came about.

Powdery white mycelium develops on the above-ground parts of plants and leaves. The disease affects not only cucumbers, but also other vegetables, bushes and trees. Diseased leaves dry out, plants bend and die. The fungus develops and acts in damp climates, optimal temperature For the life of the fungus, 16-22 degrees is considered.

Describing in detail step by step actions powdery mildew You can talk about the fact that first a cobweb coating of the fungus is formed (the so-called mycelium, or spores). White bloom is only the beginning of the takeover of the plant, because it is not interested in the surface, but in the nutritional tissues of the leaf. The spores release their shoots, which penetrate through the skin of the leaf right up to the very middle of the soft fibers. With the help of shoots it pumps out everything nutrients to the surface of the mycelium. The mycelium, with renewed vigor, throws out new shoots and so on until the leaf is completely exhausted.

What does powdery mildew look like (signs)?

The main symptom of powdery mildew is whitish-gray coating. At first, the layer of plaque is thin, as if it were just dust. But over time, the plaque becomes thick and turns black. Small brown balls appear on the upper side of the leaves.

Affected plant leaves should not be taken natural shape, curl upward and the surface becomes loose. When the leaves affected by the disease dry out and fall off, the plant stops breathing (that’s what leaves are for) and eventually dies.

Usually, powdery mildew begins its destructive effect from the lowest leaves, and gradually rises up the plant until it covers it entirely. Infected fruits can be recognized by the cracks that appear.

What are the causes of powdery mildew?

Powdery mildew fungus spores are found in the soil. Rest assured, there are these spores in the soil in your garden bed too. However, the disease develops only under comfortable conditions.

Ideal conditions for powdery mildew

The soil used to dry out and then become salted;
Water when the top layer of soil is still moist;
Damp, cool, cloudy weather throughout the week.
High air humidity (about 80%);
Dense planting;
Excess nitrogen in the soil.

Strong and beautiful bushes(in this case, cucumber bushes) are less susceptible compared to weak bushes.

The conditions under which fungal spores can wake up and begin their dark deeds are listed above. It can be carried through air, water, and even with our hands we can transfer spores to other plants, bushes, trees and flowers.

How to fight powdery mildew?

We do not feed the beds where disease damage has been noticed;
We stop any spraying (thus reducing air humidity);
If there is such an opportunity, then we improve the lighting for plants;
We remove weak or old leaves, thin out the plantings;
If the plants are in a pot or container, change the top layer of soil;
Treatment with preparations against powdery mildew, follow the instructions that come with the preparation.

Preparations against powdery mildew

Fundazol;
Speed;
Topaz;
Amistar extra;
Acrobat MC;
Previkur;
Byleton;
Sulfaride;
Tilt CE;
Vitaros.

Fundazol- contact action drug. Active substance- benomyl. Non-volatile, hazard class for humans - 2 (classified as a strong toxic substance).

Score- used as a means for the treatment and prevention of a number of plant diseases. The active ingredient is difenoconazole. Hazard class for humans - 3 (moderate toxic substance).

Topaz — systemic action. The active ingredient is penconazole. Hazard class 3.

Vitaros- sold in ampoules. Serves for etching planting material seeds and bulbs from diseases. Active ingredient: carboxin.

Fighting powdery mildew with folk remedies without chemicals

Ash along with soap. 1 kg of ash is mixed in 10 liters of heated water (approximately 30-40°C). The liquid is infused for about 5-7 days, without forgetting to stir. Next, drain the liquid into a clean container and add a little liquid soap(soap gives stickiness, so the solution sticks well to the leaves of plants and stays there tightly) and actually spray it. You need to treat with a solution of ash and soap 3 times, every day or every other day.

Garlic infusion. Add 25 g of chopped garlic to 1 liter of water (we need garlic juice), stir and leave for 1 day. Before spraying, do not forget to strain the infusion from floating pieces of garlic.

A solution of baking soda and soap. Dissolve 1 tablespoon of soda and half a teaspoon of liquid soap in 4 liters of water. Spraying is carried out 3 times with a rest of 7 days between them.

Mustard solution. Stir 2 tablespoons of dry mustard in 10 liters of hot water. Spray as soon as it cools down.

Cow dung infusion. Rotten manure is poured with water in a ratio of 1 to 3. The concentrate is stirred and infused for 3 days. Add water before spraying the bushes equal amount concentrate, because as many.

In the video clip, an experienced gardener talks about how an infusion of cow manure helps him fight downy mildew. After all, when the fruits are already ripe, it is strictly forbidden to use chemicals, but natural ones are very possible.

Serum solution. Water is added to the serum in a ratio of 1 to 10. The plants are treated at least 3 times with a break of 3 days. A film forms on the leaves and stems that does not provide oxygen to the fungus and spores, but for the plant this film serves as an additional source of nutrition, one might say fertilizing.

Potassium permanganate. Add 2.5 g of potassium permanganate to 10 liters of water. Spray the solution 2-3 times with an interval of 5 days.

Prevention of powdery mildew

Experience shows that prevention the best remedy combat not only powdery mildew, but also many other diseases.

Do not overfeed the soil with nitrogen fertilizers;
Throw through dense crops;
Do not be late with potassium-phosphorus supplements;
Pick off old leaves that touch the ground;
Water the plants after the top layer of soil has completely dried;
Removal and complete cleaning of crop residues and weeds;
Selection of varieties resistant to powdery mildew;
Deep plowing of the soil.

The video describes methods of control and preventive work against the fungal disease powdery mildew.

☀ Good luck and all the best to you! ☀

We sowed or planted most of the plants in the spring and it seems that in the middle of summer we can already relax. But experienced gardeners know that July is the time to plant vegetables to obtain a late harvest and the possibility of longer storage. This also applies to potatoes. It is better to use the early summer potato harvest quickly; it is not suitable for long-term storage. But the second harvest of potatoes is exactly what is needed for winter and spring use.

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The question of how to deal with powdery mildew arises among summer residents very often. The problem worries many, since powdery mildew is a disease that affects vegetables, fruits, berries, and flower crops, but it’s not at all easy to fight it. However, it is necessary to fight, otherwise powdery mildew can worsen appearance plants and destroy the harvest.

This disease is very insidious and widespread everywhere. In many cases, non-chemical remedies help. If the situation is advanced, you should fight the infection with the help of special drugs.

The variety is American powdery mildew, which is otherwise called spheroteca. If you do not fight this disease, it can completely destroy the harvest of gooseberries and black (less often red and white) currants. Diseased bushes seem to be sprinkled with whitish or grayish powder, and the berries die before reaching the ripening stage; Early leaf fall is observed.

Another fungal disease, downy mildew (downy mildew), has a slightly different nature. It develops inside leaf blades that become covered with yellow and brown spots dying tissue; a grayish coating is visible below. Destroys such vegetable crops as onion and cucumbers (except for modern resistant varieties and hybrids). Agronomic science believes that preparations with copper are very successful against downy mildew, but they are less effective against powdery mildew.

Plants vulnerable to powdery mildew

Cucurbitaceae family - cucumbers, zucchini, pumpkins, melons, watermelons, etc.
Nightshade crops - tomatoes, peppers, eggplants, potatoes, etc.
Strawberries (not to be confused with gray rot, the damage of which is visible only on the berries).
Berry bushes - rose hips, gooseberries, currants; less often raspberries, honeysuckle, viburnum, etc.
Fruit trees (apple tree, less often pear, as well as peaches, etc.).
Grapes (on them, especially in the southern regions, a special type of disease develops, called oidium).
Various perennial flowers, ornamental shrubs, trees: roses, clematis, honeysuckle, peonies (), hops, maples, phlox, delphiniums, rudbeckias, autumn asters, monardas, primroses, etc.
Annual flowers: petunias, impatiens, dahlias, zinnias, salvias, drummond phlox, calendulas, sweet pea etc.
Lawn grasses.

Methods of infection with powdery mildew

Spores fall on plants from the soil and organic residues they have inseminated, and are stored on the branches of bushes (where they successfully winter), frames of greenhouses and greenhouses, gardening tools, clothes. They can be transferred with water, wind, on hands, on the soles of shoes (including from other people's infected gardens), and also from indoor flowers and purchased bouquets. The disease develops successfully in a humid and warm environment. In addition to rain, outbreaks of the disease are provoked by hot daytime weather, which is accompanied by heavy night dew. Soil drought is also harmful; it weakens the intracellular environment of plants, and it becomes difficult for them to fight infection.

Preventive measures against powdery mildew

Growing powdery mildew-resistant varieties and hybrids (especially for roses, cucumbers and melons, gooseberries and currants, as well as grapes).
Plant without thickening, in sunny places; good ventilation (in greenhouses - without sudden changes in temperature), avoidance of excess dampness.
Watering without sprinkling and splashing the soil; mulching.
Feeding with potassium-phosphorus fertilizers, without excess nitrogen (especially for shrubs, trees and flowers).
Cutting out and burning diseased branches.
Deep digging of soil and disposal of plant residues.
Crop rotation.
Moving away from monoculture. Plants prone to disease (for example, phlox, roses) should be placed in isolated groups rather than in a continuous “clearing”.
Landing cultivated plants away from such “lovers” of infections as oak, maple, and hops. You should not place your gooseberry and currant bushes close to your neighbors.
Quarantine for “suspicious” purchased and donated plants. Washing hands and shoes after visiting other people's summer cottages.

Fighting powdery mildew

Folk methods

Gardeners and gardeners have been using available home remedies against powdery mildew for decades. They work well preventatively and early stages introduction of fungus. Vegetables, flowers, trees are treated in advance or at the first signs of infection, and again after a week. By folk remedies All dosages (the amount goes to a bucket of water, except points 6, 7) are given approximately, you should proceed with caution!

Wood ash (infusion): mix 2 liter jars of ash, let stand for 5-7 days, then add grated laundry soap (a couple of tablespoons), filter.
Wood ash (decoction): pour a half-liter jar into the liquid and boil for half an hour, cool, drain from the sediment, filter.
Cow manure (or rotted hay): fill the container a quarter with it, add water to the top (necessarily natural, without chlorine), leave for 3 days. We dilute a liter of infusion with three liters of water when fungal diseases are detected in plants.
Horsetail: put 1 kg of the juicy greens of this plant in a bucket, let it brew for a day or two, then boil for half an hour. To spray, mix 2 liters of this decoction in 10 liters.
Infuse garlic (300 g) for a day or two, strain.
Onion peels: combine 5 liters of boiling water with 100 grams and leave for a couple of days.
Whey or skim (low-fat) milk - 3 liters per bucket. We do the treatment in the morning on a clear day.
Bread kvass (live fermentation) - kvass/water 1:10.
Mustard (powder): a couple of tablespoons in hot liquid; use after cooling.
Baking soda: add 100 grams of soap to 2 tablespoons, all in hot water After stirring, cool.
Soda ash (5 tablespoons) and laundry soap(50 g).
: 1 tablespoon per bucket - for roses; For the rest of the plants, make the solution twice as weak (half a spoon, about 10 ml).
Potassium permanganate: one and a half grams.
Pour boiling water over the bushes early in the spring (before the buds swell).

Biological drugs

The agricultural industry offers several environmentally friendly products to combat powdery mildew. Special cultivated bacteria and their metabolic products inhibit the development of harmful fungi. Beneficial features stored only in water without chlorine and other chemicals. Biological products are effective when used in advance, prophylactically, several times (according to instructions).

Fitosporin - contains spores that, under the influence of moisture and heat, turn into special bacteria. These microscopic living creatures reproduce, and their waste products suppress pathogenic fungi and also stimulate the plant’s immune response. The drug has a wide spectrum of action. Safe for the environment.
Alirin - works in the form of a solution containing beneficial live bacteria. At a dosage of 1 - 2 tablets per liter of water, do 3 sprays with an interval of 1-2 weeks. Prevention is especially recommended for flowers, currants, and cucumbers. The fruits can be eaten immediately.
Baktofit is a natural antibiotic produced by special bacteria. Shows excellent results, especially on roses. The substance poses a potential danger to some types of beneficial insects (harmless to bees). The waiting period for a person is one day.
Strobe - refers to new group drugs close to biological ones. Contains artificial substances similar to natural toxins that can fight harmful fungi and their spores. It is especially recommended for use at the beginning of the season, in the very early stages of diseases.

Fertilizer Siliplant

Siliplant is a series of fertilizers for all garden crops. Contains active forms chemical elements, including silicon, which mobilizes the internal resources of plants, enhancing their ability to fight diseases on their own. There is information that Siliplant destroys fungal spores.

Concentrated fertilizer solutions

In early spring (strictly before the buds swell) and in the fall after the leaves fall (at a temperature of about +5 degrees), you can carry out special spraying of bushes and trees (as well as the soil). It can “burn” many infections. To prepare the solution, take 700 grams of urea (

Chemicals

It is believed that traditional fungicides containing copper are not effective enough against powdery mildew (HOM, Oksikhom, Bordeaux mixture, Copper sulfate). However, sometimes, to combat this disease, it is suggested to use a copper-soap mixture ( copper sulfate- 1 heaped teaspoon - with 150 grams of soap in a bucket of water) for spraying diseased plants. The waiting period before consumption is 5 days (cucumbers, melons), a week (tomatoes), two weeks (other crops).
An ancient, traditional remedy is sulfur. On its basis, the industry produces the drug Tiovit Jet. It is recommended for use on roses and fruit and berry crops. Not recommended for use in hot weather sunny weather, since the evaporation of sulfur vapor can cause burns to plants. Sometimes in the literature there is a ban on the use of sulfur for processing gooseberries (again due to the sensitivity of its foliage to burns). The waiting period is one day.
Topaz is a very effective modern fungicide. Shows excellent results on roses and other flowers. Successfully fights powdery mildew on currants and gooseberries (in the budding phase, on young ovaries and after harvesting). The drugs Forecast, Chistoflor, and Agrolekar have a similar effect. The waiting period is approximately half a month.
Skor, Diskor, Rayok, Guardian, Pistotsvet - a group of products based on difenoconazole. They have high preventive, protective and therapeutic effect. Penetrate into the internal environment of plants; The waiting period before harvesting is at least three weeks. Most often used on flowers and apple trees.

Fungal infections are able to “get used” to certain substances, therefore, in order to successfully fight powdery mildew, different means need to alternate.

It should be noted that the drugs nitrafen and foundationazole, often mentioned in the literature, have not been produced for use on private farms for a long time.

Powdery mildew or ashweed can appear on indoor plants, garden plants, and wild plants. No treatment berry bush or perennial flower can die in just one summer season. You can get rid of the disease using pesticides or folk remedies.

What is powdery mildew?

Spots of mycelium first appear on the leaves, and then the lesion covers the petioles, stalks and fruits. The infection spreads primarily through lower leaves, close to the ground, since fungal spores overwinter in the soil. Gradually, the plaque covers the entire plant. A white coating appears on the flowers, the leaves dry out, and the infected fruits crack and rot.

A dense coating of mycelium prevents cells from developing and feeds on their contents. As a result, the leaves dry out and the plant weakens. The disease is especially destructive for young shoots. Their cells have very delicate walls, which the mycelium destroys without difficulty.

What plants does it affect?

Phytopathology can develop on most representatives of the flora. Ashtray is most noticeable on vegetable crops. Pumpkin, nightshade, onion, garlic, and beets suffer from it. The disease is rampant on tomatoes and. Recently, potatoes began to be affected.

Strawberries and raspberries suffer greatly from ashtray in rainy years. The disease develops quickly on black currants - already at the beginning of summer, the leaves can curl and become covered with a white coating.

On currants, ashtray is a frequent companion of aphids. Shoots weakened by sucking insects become especially susceptible to fungal diseases.

Plants with delicate, soft leaves are especially quickly affected.

From the rooms it is:

gloxinia;
Saintpaulia;
balsam;

In the garden, the disease threatens primarily:

apricot;
apple tree;
pear;
cherry

In forests and parks, white bloom regularly appears on oak and maple leaves. The danger of ashtray for forest species is that the fungus does not die even in the harshest winters and on next year continues to weaken the tree until it eventually leads to the death of the giant.

What does an ashtray look like?

Powdery mildew is difficult to confuse with anything else. Grayish-white coating - very characteristic feature. If after some time dark brown or black balls appear on it, there is no doubt that the plant is affected by ashtray.

Ashpelt

It is important not to confuse powdery mildew with peronosporosis. These diseases are caused by microorganisms from different classes, manifest themselves differently and require different treatments.

With ashberry, the coating is snow-white, located on the upper surface of the leaf blades. Downy mildew manifests itself as a grayish-yellow coating, most often covering the underside of the leaves facing the ground.

Penosporosis on cucumber leaves

What is it caused by?

Microorganisms that cause disease:

How is it distributed?

The causative agents of the disease, cleistothecia, overwinter on fallen leaves. At the beginning of summer, the wind carries the spores. Once on the host plant, they germinate and the mycelium penetrates the leaf tissue.

Having grown well, the mycelium appears on the surface in the form of a white powdery or cobweb-like coating. Here, cleistothecia are formed on it - black or dark spherical tubercles.

Infected leaves overwinter under the snow. At the beginning of summer, the cleistothecia rupture, releasing spores on all sides, and the cycle repeats.

Disputes can germinate in sheet plates at certain temperature and humidity parameters. Plants are especially vulnerable when hot, dry weather gives way to rainy weather or changes begin between day and night temperatures.

The disease is promoted by the rapid growth of young shoots caused by excessive nitrogen fertilizing. Damaged, severely injured plants, for example, those that have undergone severe anti-aging pruning, lose immunity and are easily colonized by infectious agents.

How to fight?

Despite the rapid spread and harmful effect on plants, getting rid of the disease is not difficult. The fight against the disease consists of following prevention and crop care rules.

When infection spreads, plants are sprayed with pesticides of chemical or biological origin.

Fungicides

Chemicals can be of systemic or contact action:

Contact pesticides– act on harmful organisms in direct contact with the source of infection.
Systemic pesticides– penetrate into plant cells and are able to be transported along with the sap throughout the plant, spreading from the roots to the tips of the shoots.

Systemic medications based on triazoles are effective against ashtray:

Speed;
Topaz;
Pure flower, etc.

The fungus can adapt to chemicals, so the product needs to be changed next season. Triazoles are used for preventative treatments and as therapeutic fungicides in the early phase of the disease. Some are able to stop sporulation. But if spores have already formed, triazole fungicides will not help.

Then use sulfur preparations:

Thiovit jet;
Cumulus DF;
Microthiol special.

Sulfur releases vapors that penetrate the mycelium and destroy it. The drugs are effective at temperatures of +18…+27 degrees. At temperatures above + 30 degrees, the substance burns the leaves, which can result in their falling off.

Attention! Gooseberries cannot be treated with sulfur - the plant will die.

The preparations are not poisonous to bees, but can cause skin irritation in warm-blooded animals and humans.

Ways to combat the disease. Video:

Biofungicides

Bacillus subtilis or Bacillus subtilis is a soil bacterium that produces antibiotics. It is included in a number of biological preparations for plant protection.

The most famous biological product for powdery mildew among summer residents is Fitosporin M. This bacterial fungicide of systemic action can be used to treat garden, garden, indoor and greenhouse plants from a complex of diseases. The working substance of Fitosporin is the bacterium Bacillus subtilis. By releasing waste products, it suppresses the proliferation of mycelium.

Alirin is a biological product based on a special strain of Bacillus subtilis. The product is used to protect and treat cucumbers (greenhouse and in open ground), black currants, gooseberries, cereals, strawberries.

Protective products are produced from different strains of Bacillus subtilis different cultures from Ashtray:

Vitaplan;
Gamair;
Sporobacterin.

In addition to Bacillus subtilis, biological products may contain spores of the fungus Trichoderma and bacteria Pseudomonas.

Folk remedies

Diseased bushes are sprayed clean water, then dust the leaves with ash powder, wrapping it in gauze. Ash sticks well to wet shoots. Plants should be left in the dust for 2-3 hours. During this time, the alkaline powder will destroy the mycelium. Leaves ornamental crops For example, roses, which often suffer from powdery mildew, need to be washed after 3 hours so that no unsightly stains remain on them. Vegetable crops can be left covered with ash until the first rain or watering.

You can get rid of the disease on flowers with soda ash:

Mix 4 g of washing soda with a liter of water.
Pour in 4 g of liquid soap for better adhesion.
Stir.

Plants are sprayed every week in the first half of summer. The product is safe for the harvest; it can be used even if the berries and fruits have already begun to ripen.

An acidic environment affects the mycelium no less harmfully than an alkaline one. To combat fungi, you can use sour milk or kefir. The fermented milk product is diluted with water 1 to 9 and garden plants are treated.

Prevention of infection

The easiest way to defeat a disease is to catch its beginning, so it is important to regularly inspect the plantings. The first sign of the disease is slightly deformed leaves or shoots. At this stage, the plants can already be treated with a fungicide.

Since fungal spores overwinter on litter, the first preventative measure is to clean the garden and berry patch in the fall from fallen leaves. It is best to burn plant waste without putting it in a compost heap.

Powdery mildew prevention includes:

crop rotation;
use of disease-resistant varieties and hybrids;
balanced feeding with optimal quantity nitrogen, phosphorus and potassium.

For preventive treatments, spraying with biological products containing Bacillus subtilis is used. It is noteworthy that prevention with biological products is possible during periods when plants are blooming, since it is not dangerous for pollinating insects.