Powdery mildew can be found on many plant species, both outdoors and indoors. IN room conditions powdery mildew can be found on roses, gerberas, cineraria, kalanchoe, begonias, cissus, violets. The cause of the disease is stagnant moist air and sharp fluctuations in room temperature.
The spread of powdery mildew occurs when a diseased plant comes into contact with a healthy one, when watered, it is carried by insects, air flow. Powdery mildew treatment should begin as early as possible.
Causes of Powdery Mildew on Houseplants
First of all, the stagnant moist air in the room and sharp temperature fluctuations are to blame. The spread of the disease is also carried out when the diseased and healthy plants come into contact, when watered, with air flow, as well as when carried by insects.
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The cause of the development of the disease can also be the excessive use of nitrogen fertilizers, as well as a lack of calcium in conjunction 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 powdery mildew
Gradually, the linen captures the stems and other parts of the houseplant. Over time, the spots increase in size, the mycelium thickens (becomes felty), the plaque darkens and acquires a brownish color.
It should be noted that flowers can also be affected by downy mildew (peronosporosis), the external signs of which are similar to real underwear. But, unlike the real one, downy mildew in the form of a plaque appears only on the underside of the leaf blade, then the spots turn yellow, increase in size and then become brownish in color. 
Folk remedies for the fight against 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 soda ash or baking soda and 20 g of liquid or grated soap in 10 liters of water and treat the plants at least twice at weekly intervals;
- whey solution: pour 1 l of whey into 10 liters of water, stir and treat three times in dry weather with an interval of 3 days;
- kefir solution: mix 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, simmer for two hours, cool, strain, dilute with water 1: 5 and carry out 3-4 treatments with an interval of five days. Undiluted, the decoction is stored in a dark, cool 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 the fungus from the fruit;
- ash solution: 1 kg is added to 10 liters of water wood ash, stir, insist 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 (chopped cloves and shoots of garlic) is poured with two liters of water, insisted and filtered for two days. Use the infusion undiluted;
- infusion onion peel: 200 g of husks are poured into 10 liters of boiling water, insisted for two days, filtered and sprayed on plants before flowering, after it and before leaf fall.
Special chemicals for powdery mildew on houseplants
If powdery mildew has appeared on your flowers, the fight against it is most effective with the help of modern fungicides. They have a detrimental effect on the fungus, stop the harmful processes in the cells of the plant, protect and treat it. Spraying is carried out 1-4 times with an interval of 7-10 days (depending on the chosen preparation).
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The most effective preparations for powdery mildew:
- Fundazol;
- Topaz;
- Acrobat MC;
- Previcour;
- Speed;
- Vitaros;
- Amistar extra.
A well-known fungicidal drug is phytosporin, active substance which is a concentrate of bacteria Bacillus subtilis in powder of chalk and humates. Despite the fact that phytosporin is considered a remedy, it is practically useless against existing powdery mildew. However, as a preventive measure, it will work 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, the right agricultural technology. To minimize the risk of infection, you must:
- regularly thin out plantings;
- remove old leaves in contact with the ground;
- water the plants only after the top layer of the earth is completely dry;
- do not abuse nitrogen fertilizers;
- in time to carry out phosphorus-potassium top dressing.
Another type of prevention against powdery mildew can be carried out in early spring before the leaves open. berry bushes and other perennials are simply scalded with boiling water. This must be done quickly, using a watering can with a diffuser. All branches should be poured over as a whole, without lingering for a long time in any one place.
The short term impact is very hot water does not have time to harm plants that have not yet fully woken up after winter. But spores, mycelium, as well as pathogens of other diseases, die. A similar effect is exerted by a jet of steam under pressure, obtained using a household steam cleaner.
Powdery mildew is one of the most common fungal diseases, striking roses. Powdery mildew on roses is caused by Sphaerotheca pannosa, a powdery mildew fungus.
Other names for powdery mildew are white roses, sphere library. This article will address the following questions:
- How to recognize the disease, what diseased plants look like.
- What factors contribute to the development of the sphere library.
- How to prevent rose disease powdery mildew.
- How to cure diseased plants.
- Do folk remedies help in the treatment of the sphere library.
- Description of varieties of roses resistant to powdery mildew.
Description of the disease.
Small whitish mealy spots appear on the foliage of a diseased plant, which, it would seem, can be easily erased. But the spots form again and again, quickly grow throughout the entire leaf plate. Powdery-powdery coating extends to green shoots and peduncles. As a result, the leaves curl up and dry out, the shoots develop poorly.
This powdery coating forms mycelium of powdery mildew fungus, consisting of conidia. Conidia are spores of asexual reproduction of the fungus in the summer, which are easily carried by the wind to neighboring plants. Sferoteka is able to hit the entire bush in a few days. If urgent treatment measures are not taken, the plant will be weakened, the shoots will not mature. In winter, such a rose is threatened with freezing.
Rose bush heavily affected by powdery mildew.
By autumn, the plaque becomes denser, small dense dark dots appear on it - cleistothecia. These are the fruiting bodies of the fungus, inside which the spores of the sexual reproduction of the fungus are formed. In this form, the fungus hibernates, and in the spring the spores are released and infect the plants again.
That contributes to the rapid development of the disease.
Powdery mildew develops rapidly at temperatures of 20-25 degrees and relative humidity up to 80%. Such favorable conditions for the disease are created:
- When warm weather sets in after past rains, moisture begins to evaporate and relative humidity rises.
- In thickened rose gardens, with poor ventilation, air is formed high humidity which contributes to the development of the disease.
- A large difference between day and night temperatures is accompanied by heavy dew.
- An excess of nitrogen-containing fertilizers contributes to the growth of young tender leaves, which are primarily affected by infection.
Prevention of powdery mildew on roses.
It is well known that it is easier to prevent a disease than to fight it long and painfully. Powdery mildew prevention will protect your flowers from many other fungal diseases as well.
Prevention measures:
- Removal of infected leaves, shoots and other plant debris on which the spores of the fungus can overwinter. Weeding weeds around bushes.
- Do not water roses with "rain".
- When planting roses, keep the required distance between the bushes, because. in dense plantings, due to poor air circulation, increased humidity is formed.
- Use nitrogen-containing fertilizers sparingly and only until mid-summer. Nitrogen contributes to the strong growth of young leaves and shoots, which are attacked by powdery mildew in the first place.
- Potassium-phosphorus top dressing promotes the ripening of shoots and buds and increases the rose's resistance to fungal attacks.
- Spraying rose bushes and soil around with copper-containing preparations in early spring and late autumn.
- Positive results are given by preventive treatments with biofungicides (Fitosporin-M, Alirin-B, Planriz, etc.).
- Purchase and plant powdery mildew resistant roses.
Powdery mildew treatment.
If, nevertheless, powdery mildew has reached your roses, you need to start treatment as soon as possible. To combat this fungal disease, there are many drugs of contact and systemic action.
Contact fungicides work on the surface of the plant, destroying pathogens upon contact with them. This group includes sulfur preparations, Bordeaux mixture, copper oxychloride, copper sulphate, iron sulphate.
Systemic fungicides penetrate the plant tissue, making the juices harmful to fungal pathogens. Drugs are effective against powdery mildew: Topaz, Skor, Rayok.
Treatment of roses with a systemic fungicide.
Rules for treating roses with fungicides:
- Before spraying, it is necessary to cut off all parts of the plant affected by the disease and remove plant debris around the bush.
- The best time for spraying is in the morning or evening in dry, calm weather.
- Carefully spray all parts of the plant, trying to moisten the leaves both from above and from the underside. It is especially important to observe this rule when working with contact drugs.
- Since fungi can become resistant to fungicides, it is necessary to alternate systemic and contact preparations with multiple treatments.
Consider below the fungicides used to treat powdery mildew on roses in more detail.
- Proven and effective tool powdery mildew treatment initial stage is colloidal sulfur. It is a contact fungicide. The powder dissolves in an amount of 30 g in 10 liters of water. It should be taken into account that at temperatures below 20 degrees, the efficiency of sulfur drops, so the concentration of the solution must be increased to 0.8-1%. At temperatures above 35 degrees, the leaves can get burned from the drug. In extreme heat, sulfur should not be applied.
- The contact preparation Thiovit Jet contains 80% sulfur and is similar to colloidal sulfur in its action and method of application. The solution is prepared at the rate of 30-80 g per 10 liters of water.
- Systemic fungicide Topaz is used for the prevention and treatment of powdery mildew. The working solution is prepared at the rate of 2 ml per 5 liters of water. If necessary, the treatment can be repeated after 10-14 days.
- A universal drug for systemic and contact action, Skor is used both for the treatment and prevention of powdery mildew. 1 ml of the drug is diluted in 5 liters of slightly warm water. Skor acts most effectively at 14-25 degrees.
- The fungicide Rayok is similar in composition to Skor, has a long-term therapeutic and protective effect in a wide temperature range.
- Topsin M is a systemic drug of preventive and therapeutic action. To combat powdery mildew, 10-15 g of the powder is diluted in 10 liters of water.
- Strobi - a systemic drug a wide range actions. For spraying rose bushes, dilute 2-4 g of granules in 10 liters of water.
Folk remedies for the fight against powdery mildew on roses.
There are many popular ways to treat powdery mildew. These funds are good as preventive protection and at the beginning of the disease. In addition, some of the substances used serve as an additional source of nutrients and enhance plant immunity.
3 times spraying with soda helps to cope with powdery mildew.
- 1 liter of whey is diluted in 5 liters of water, 10 drops of iodine are added. The resulting solution is sprayed with roses 2-3 times a month. Serum not only protects and treats powdery mildew, but is also a source of trace elements for the plant.
- Ash is often used to treat roses. Pour 1 kg of sifted ash with a bucket of warm water and leave for 3 days. Light infusion drain, strain and use for spraying rose bushes. For better adhesion, you can add a spoon laundry soap. Add water to the remaining sediment up to 10 liters and water the plants under the root as a top dressing.
- Dilute 2 tablespoons of baking soda in 5 liters of water, add a spoonful of laundry soap and treat roses every 10-14 days for prevention. In case of disease, treatments are carried out at weekly intervals three times.
- Pour fresh cow dung with water in a ratio of 1: 3 and leave for three days. The resulting infusion is diluted with water 1:10 and used to treat bushes.
- In 10 liters of hot water, stir 40-50 g of soda ash, add 40 g of laundry soap. The bushes are sprayed with a cooled solution with a week break up to two times.
- In the initial stage of the disease, the plant can be treated with a solution of potassium permanganate (3 g per 10 liters of water) up to three times with an interval of 2-3 days.
Powdery mildew resistant rose varieties.
There is a wide variety of powdery mildew resistant roses on the market. Below we give a description of some varieties that are distinguished by good immunity to diseases.
Cadillac (Cadillac)
Cadillac (Cadillac)– patio group rose. Bush up to 80 cm high. Terry flowers, scarlet color, size 5-8 cm, without aroma.
Augusta Luise (Augusta Luise) - tea-hybrid rose with large flowers up to 15 cm, apricot-pink color, with a strong aroma. Bush up to 120 cm high. Rose blooms all summer.
Galaxy
Galaxy- floribunda rose. Bushes 80-100 cm high, sprawling. The rose blooms profusely with creamy yellow flowers with a pinkish edge, collected in a brush of 3-5 pcs. on the stem. Flower diameter up to 8 cm.
Westerland
Westerland- rose-shrub with large salmon-yellow flowers 10-11 cm in size. The bush grows up to 2 m. The rose blooms profusely all summer, has a strong aroma.
Aphrodite (Aphrodite)
Aphrodite (Aphrodite)- tea-hybrid rose with magnificent large 10-12 cm flowers of pale pink color, has a delicate aroma. The bush is compact in height about 80 cm.
Lady of Shalott
Lady of Shalott- English rose with double salmon-pink flowers 8-10 cm in size and warm aroma. The bush is branched in height up to 1.5 m. The rose blooms throughout the season.
Gold spice (Gold Spice)
Gold spice (Gold Spice)- floribunda rose with peach-yellow semi-double medium-sized flowers. The bush grows about 60-70 cm. Flowering is plentiful, long.
It should be noted that the listed varieties of roses are resistant not only to the sphere library, but also to black spot.
By planting roses resistant to powdery mildew in your garden, you can greatly facilitate your care of the rose garden. Of course, preventive measures should not be neglected, especially if the weather turned out to be unfavorable.
My friend with thirty years of experience as a florist says: powdery mildew is like candidiasis, only in flowers. True, garden and horticultural crops are also “successfully” infected with this disease. But if you catch yourself right away, the treatment will not be delayed.
Powdery mildew (scientifically oidium) is fungal disease. At first, it seems to be only a whitish dust on the leaves, which, if desired, can be washed off or wiped off. But over time, the "dust" will grow, turning into "felt".
The attack of powdery mildew on the plant occurs in this way:
- Appearing on the surface of the sheet (on the street this happens more often in the first weeks of summer, in the apartment all year round), fungi tend to penetrate its flesh. Feeding on the juices of the plant, the mycelium grows.
- The mushroom picker thickens, and if the plant is not dealt with, the thickness of the plaque approaches 1.5 centimeters.
- Having captured the entire leaf, the mycelium "decides" that this is not enough, and begins to release spores. If it is warm (above 20 degrees) and sunny around, all neighboring leaves, branches and other plants will definitely succumb to attack. On the street, this process will last until the end of summer, indoors - at least all year round. Moreover, humidity (rain, watering, spraying) does not play a role.
- Further, the mycelium builds up fruiting bodies that look like brown or black dots. So she prepares for wintering - the leaves with the "fruits" will fall off and safely lie down until spring, and when it gets warm, the wind will blow, and the mushrooms will fly to new plants.
Powdery mildew pathogens
They are called powdery mildew mushrooms. Moreover, it is interesting that there are many of them in nature, and each is “responsible” for its own type of plant. Or even a subspecies - for example, powdery mildew will not jump from pedunculate oak to decorative red, as different types of fungi will host on the trees.
Cultures that constantly suffer from various fungi:
- peaches,
- gooseberry,
- grape,
- roses,
- cereals,
- pumpkin,
- cucumbers,
- beets (sugar).
As for indoor flowers, powdery mildew most often starts on violets (saintpaulia).
How to deal with such a scourge
The first and most important rule: do not postpone the treatment of plants for tomorrow. Powdery mildew spreads very quickly, so there is not a minute to lose.
Diseased shoots are removed from trees. Indoor plants collect the entire upper soil, it often hides entire colonies of pests.
Also, any plant must be treated with a fungicide. If the infection is not serious, you can start with folk remedies, but if things have gone far, it is better to immediately buy something effective. But in any case, you need to spray the plant (especially the indoor one) so that it drips from the leaves.
Fungicides
Yes, these are chemicals that may not smell very pleasant (which is especially true for indoor flowers, which are best processed on open balcony). But these tools are the most powerful.
Look in the pharmacy for one of the following drugs:
- "Byleton"
- "But",
- "Quadris",
- "Skor"
- "Topsin",
- "Topaz",
- "Tilit",
- "Thiovit Jet",
- "Fundazol",
- Fundazim.
Important! After the first treatment, wait a week and carry out a second "sanitization", even if there are no more traces of powdery mildew on the leaves.
Biofungicides
These substances are of a different plan: their basis is live bacteria that inhibit the development of fungi.
Their main advantage is environmental friendliness. Therefore, they are allowed during flowering fruit crops as well as during fruit ripening.
As for the drawback, there is only one so far: they are not as strong as conventional chemical fungicides. So having bought a biological product, tune in to the fact that you will need to carry out a series of treatments.
Quality biofungicides are:
- Alirin-B,
- "Gamair",
- "Planris"
- "Pseudobacterin-2",
- "Fitosporin-M".
Ethnoscience"
Such recipes are also not the strongest, but it’s not scary to use them on the same gooseberry, on which the fruits are already ripening, which you really want to treat your children or grandchildren.
- Soap + soda. For 1 liter water is coming 4 g of soda (calcined) and soap. Treat diseased plants with a spray bottle once, and again after 7 days.
- Ash tincture. Pour 0.5 cups of ash (wood) with a liter of boiling water. Let it brew for 2 days. Add 4 g of soap here (it is better to dilute it with water first). Spray the plants with this substance the same two times, but if necessary, more often.
- Garlic. Soak 25 g of chopped garlic in 1 liter of water. Let the water soak overnight. After straining with this solution, you can spray plants (even indoor flowers).
- Serum. The same, from kefir or yogurt. This dairy product is diluted cold water, for each glass of whey pouring 10 glasses of water. This solution should be sprayed on diseased plants.
- Potassium permanganate. 2.5 g of this substance is dissolved in 10 liters of water. Plant treatment is carried out every 5 days, 2 or 3 times.
- Copper vitriol. This substance itself is a purchased fungicide, but it is so old and tested so long ago that many people completely trust it and consider it almost a folk remedy. You need to use it from powdery mildew like this: 5 g of vitriol is diluted in a glass of hot water. In another bowl, dilute soap in a ratio of 1:10. Vitriol is introduced to the soap in a thin stream (this amount is calculated for 50 liters of soap solution).
More recipes that can be used even during the fruiting period of the "patients", you will learn from this video:
But, of course, the most popular folk remedy against oidium is soda. In this video you will not only learn how to use it experienced gardener, but also hear a real live review.
Of course, do not expect that this is - Magic wand, but it’s not scary to apply soda on fruits that children can pick tomorrow:
Prevention
- Do not let the tops lie in the gardens until spring, burn it since autumn.
- In the beds, stick to crop rotation, not planting related crops in the same place for two years in a row.
- Now there are a lot good varieties vegetables. Choose disease-resistant hybrids.
- If last year you encountered powdery mildew on your site, already at the beginning of summer you can arrange a preventive treatment of the garden (garden, flower bed) with the same fungicide (or, for starters, at least soda). How to properly dilute the fungicide for such a case is written on the package.
What not to do if you notice powdery mildew
- Do not prune the plant, health pruning weakens it (although this does not include the removal of affected branches).
- Do not feed the plant with nitrogen fertilizer, experienced gardeners claim that this only exacerbates the development of powdery mildew.
- Immediately remove the infected flower from the still healthy flowerpots of its kind. Set up a temporary quarantine window sill.
- Do not spray the plant so that water drops do not spread fungi to other leaves. Also don't put it in open window(after all, a breeze, even a light one, is another spreader of the disease). If the plant is planted in open ground, try to postpone watering (or pour water exclusively under the root).
Let's figure out what kind of disease it is, what harm it does and how to deal with it.
What is the harm?
Powdery mildew initially manifests itself as a white coating on plants, which has formed a fungus mycelium. At first, the raid looks like a web. Over time, it becomes like a powder. The plaque strikes the sheet on both sides.
Most often, young branches and leaves are affected: they contain a lot of nutrients required by the mycelium. The danger to plantings is that fungi quickly spread throughout the plant.
Description and signs of the disease
The most vulnerable plants
Powdery mildew only affects deciduous plants: , and even . Also, this disease causes great harm to such ornamental plants as, and many others. The course and development of the disease in all plants is approximately the same. And the disease develops most often in warm cloudy weather and with high humidity.
Important! Powdery mildew develops best at 18-25 ° C and high humidity.
Causes of the disease
Once on the plant, it penetrates the inside of the leaves and begins to feed on the beneficial substances that are inside the leaf. The fungus grows and forms a mycelium. Over time, the spores of the mycelium burst, and the mushroom seeds “fly” onto neighboring leaves or plants.
How to fight: folk and chemical remedies
It is possible and necessary to fight this fungal disease. It is necessary to remember a few rules that will help not only prevent the onset of the disease, but also tell you how to get rid of powdery mildew if it has just appeared:
- plant only after the soil has dried;
- plants are not allowed;
- diseased plants must be brought to light;
- it is also necessary to monitor fallen leaves: they should not lie on the ground.
Use less. It is better to replace them with phosphorus-sodium (with remission). During the period of the disease, it is not recommended to fertilize the land at all. Let's figure out which powdery mildew remedy helps for each class of plants. On vegetables
- . In case of disease of vegetables, it is necessary to remove the damaged parts of the plant. From folk remedies, the application of sulfur powder in the ratio of 25-30 g per 10 square meters is suitable. m. A solution of colloidal sulfur also helps: for 35 liters of water, 25-30 g of sulfur. Of the preparations for the treatment of cucumbers, and are suitable. Read the instructions before use.
- . The disease appears in two ways: either at the edges the leaves begin to dry out and over time the young plant dies, or yellow spots on the top side of the sheet. In this case, plaque is visible only on the back side of the leaves of vegetables. Over time, it appears on the upper side of the leaves of the plant. If the tomatoes are sick, they must be sprayed with a solution. When spraying, read the instructions. Helps with this disease and "Bactofit". It is necessary to process 3 times with an interval of 1-1.5 weeks. "Planriz" will also help to cope with powdery mildew. Do not forget about the help of drugs such as Baileron and. It is advisable to add laundry soap to the solutions of these preparations.
Did you know? To create 1 ton tomato paste it is necessary to grow 5.8 tons of tomatoes.
- . The land around diseased zucchini is necessary. It is also necessary to spray this plant with a solution of or. Of the drugs you need to use "Kefalon", as well as phosphorus sodium.
- You can cope with the disease thanks to a solution of soda ash or with the help of. It is necessary to spray the plant 4-5 times with an interval of 7 days.
On fruits and berries
- Powdery mildew on currants is immediately noticeable. If you do not fight it from the very beginning, then by the beginning of autumn the shrub will die. The harm of the disease is also dangerous in that it affects all species. If one bush is damaged, all bushes may die. In the fight for currants, it must be treated with both chemical and folk remedies powdery mildew control. You can treat the bush with natural methods - ash solution, manure solution, and so on. Among the chemicals, Nitrafen or spraying with a solution will be effective. In summer, it is best to spray with soda ash. In the spring - copper chloride.
- . Gooseberries are treated with kefir, manure, soda, infusion of hay, ash, horsetail decoction. They will help for the recovery of the bush and "Gausin" with, as well.
- . The conditions under which the disease develops best are from 18 to 25 degrees Celsius and high humidity. At low humidity, the disease does not develop. Treat grapes (at +20 ° C or more) with a solution of sulfur in water: for 90 g of sulfur, 10 liters of water. When the temperature is below 20 ° C, colloidal sulfur is useful for treatment. During the ripening of the fetus, it is best to use a weak solution of potassium permanganate. Among the chemicals that help destroy the disease, it is better to use Quadris or Topaz.
Did you know? To get 1 kg of raisins, you need 4 kg of fresh grapes.
- . Powdery mildew is dangerous for apple trees and garden trees that the protective function of trees to frost may decrease, which means that the apple tree may not overwinter. In addition, this disease halves the yield of apples. To protect the trees, you can treat them with soda ash along with soap, as well as copper oxychloride. "Topaz" apple trees are treated with a break of 6-12 days . Before starting treatment, remove all infected tree branches.
- . This disease manifests itself on strawberries in the form of plaque on the back of the leaves. With the progression of the disease, it passes to the mustache and plants. The fruits may smell like mold. Strawberry treatment is carried out with the help of Quadris, Switch or Bayleton preparations. After the appearance of the first berries, it can be treated with "Fundazol". Carefully process strawberry leaves on both sides and do not forget about the instructions for these preparations.
Moreover, in the fight for good harvest, "TMTD" or a 1% suspension of colloidal sulfur will help you. On garden flowers
- also suffer from powdery mildew, which affects the stems of flowers. At first the color of the plaque is white, but then it changes to brown. Infected leaves must be removed and the flowers treated 2-3 times with a 1% suspension. Repeat the procedure after 7 days until the flower recovers.
- Roses. If you see that the roses are sick, Fitosoprin-M, colloidal soda, and Maxim will help you cure them. In spring and autumn, prepare a solution to combat this disease from 50 g of soda ash, 10 liters of water, 300 g of soap (preferably green) and 15 g of copper oxychloride. Treat roses with this solution and they will be healthy.
- . To cure a petunia, it is necessary to remove all diseased parts of the plant. Next, you need to process the flower, "Topaz" or "Fundazol". For potted petunias, after removing the infected parts of the flower, it is necessary to remove the infected layer of earth and replace it with a new one, which must be treated with Fitosporin-M. A solution of ash, whey, mustard also helps to fight powdery mildew.
- become infected with this disease during heavy watering, a large amount of nitrogen fertilizers or in very warm weather. Powdery mildew can be cured with the help of "Morestan", "Topsina-M", soda ash with soap or with the help of "Fundazol".
On indoor plants
White plaque on indoor plants, which appeared when the temperature drops or the stuffiness of the air in the room, is powdery mildew. This white coating on indoor flowers is dangerous because if the plants are close to each other, a healthy plant can also get sick. As a result, due to powdery mildew, the flower rots and dies.
Indoor flowers are treated for powdery mildew with a solution of potassium permanganate or garlic tincture. Soda ash will also help.Of the chemical drugs, Bayleton, Topaz, or will help best. Before using the drug, read its instructions. 
Prevention of the appearance
It is known that any disease is easier to prevent than to treat. Let's see what are the methods of preventing plants from powdery mildew.
- Serum solution. Combine 1 liter of serum with 10 liters of water. Next, the solution is applied to the damaged stems at least 3 times with an interval of 3 days.
- Decoction from. A solution in a ratio of 1:10 (horsetail with water) is boiled for 1.5 hours. Then it is filtered, again diluted with water with the calculation of 1 liter of solution per 5 liters of water. This solution should be sprayed bushes. Store the solution in a warm place for no more than 7 days.
- Mustard. 1-2 tbsp. l dry mustard diluted with 10 liters of hot water. Cool down. Next, the solution is either watered on the ground, or the plant is sprayed.
- Copper vitriol. 5 g blue vitriol dissolved with 1 tbsp. water. Additionally, 50 g of soap is diluted in 5 liters of water (warm). A solution of vitriol is combined with soapy water. The plant is sprayed 2-3 times a day with a frequency of 6-7 days.
- Manure tincture. Infused 1 kg of manure per 3 liters of water. After that, the solution is diluted with 3 liters of water. Used as a means for spraying shrubs.
- Baking soda and soap. Dissolve in 4 liters of water 1 tbsp. tablespoons of soda and ½ teaspoon of soap. Spray 2-3 times a day with an interval of 6-7 days.
- A solution of ash and soap. 1 kg of ash is added to 10 liters of warm water. During infusion, the solution is stirred. After that, it is poured into a clean dish and liquid soap is added. Used as a spray. 10 liters of water are added to the remainder of the ash solution and the bush is watered.
- Potassium permanganate. 5 g of potassium permanganate is diluted with 1 liter of water. Sprayed 2-3 times with an interval of 5 days.
- Soda ash and soap. 5 g of soap and 25 g of soda are added to 5 liters of hot water. Cool down. Spray the soil and plant 2-3 times with an interval of 7 days.
I would also like to dwell on preventive measures for the treatment of individual, the most common green plants.
- Cucumbers. Prevention is proper fit and care, as well as spraying with the Quadris preparation.
- Tomatoes. To prevent powdery mildew, it is necessary to soak the tomato seeds in a solution of "Immunocytophyte" or "Epin" 42 days before planting in the ground. You can also treat tomatoes with 10% whey or ash solution.
- Zucchini. Prevention of powdery mildew on zucchini: spray with Nitrafen in spring. Folk methods sprayed every other day in dry weather.
- Grape. Use a solution of sulfur - 25-40 g per 10 liters of water.
- Apple tree. To prevent this serious disease, the tree must be treated with Topaz.
- Strawberry. Don't plant strawberries too densely. Weed it in time and replant those bushes that are too close to the "relatives".
- Phloxes. Mulching with humus or peat. In the spring, phloxes are treated three times with 1% Bordeaux liquid. Repeat the procedure after 12-14 days. It is also necessary to fertilize the flowers with mineral fertilizers.
- Roses. Weed promptly. In autumn, it is advised to collect and burn the vegetation in the garden, and dig up the soil.
- Indoor plants need potassium-phosphorus fertilizers, room ventilation, proper watering and general flower hygiene to fight powdery mildew.
Kirill Sysoev
Calloused hands do not know boredom!
Content
What is powdery mildew
Under this disease, which is otherwise called ashtray, linen, is meant a fungal infection of a plant caused by microscopic fungi from the order of powdery mildew (Erysiphales). This disease is subject to a large number of vegetable, fruit, berry, ornamental plants. They are very susceptible to the American ashtray or sphere library garden flowers. Sometimes with a cut from a garden or store, this fungus also gets on houseplants.
Pathogen
Whitish plaque is a mycelium that lives off vegetation. Reproduction occurs through spores that look like small balls. Brown color. Before you find a suitable remedy for powdery mildew, familiarize yourself with the causative agents of this fungal disease. The name of this problem reflects the features of the symptoms of infection - they are common to different types imperfect mushrooms. Pathogenic microorganisms include:
- Erysiphe communis - causes infection of sugar beets;
- Sphaerotheca mors - gooseberry;
- Uncinula necator - grapes;
- Sphaerotheca pannosa Lew. var. rosae Voron. - roses;
- Sphaerotheca pannosa forma persicae - peach;
- Oidium tuckeri - grapes;
- Erysiphe graminis - cereals;
- Erysiphe cichoracearum, Sphaerotheca fuliginea - affect a wide range of plants.
Symptoms
This fungal disease is easy to determine, because. has characteristic symptoms. It begins with the appearance of white spots small size on the top side of the sheet. Gradually, these spots begin to increase until they cover the entire leaf as a whole. Then they move to the whole above-ground part plants. As you progress, the spots become not only larger, but also denser, whiter. As a result, the bush becomes like a plant doused with lime. On examination, you can see that the leaves are covered thin layer cobwebs or cotton wool is the white mycelium of the fungus.
Concerning fruit trees, then the growth of the bush begins to be disturbed in them, and the wood ceases to ripen on the maturing shoots. The bush eventually suffers from frost - this is especially detrimental to grapes. In addition, the sphere library quickly moves from leaves to fruits and ovaries. As a result, you can be left without a crop, because fruits affected by white plaque cannot be eaten. With vegetables, it is a little more difficult, because. tropical vegetation consumes a lot of nutrients for the formation of fruits and overall growth. Often they do not cope with the infection and simply die.
How it spreads
White bloom on flowers and leaves can be spread by spray when watering other plants. The wind also contributes to this. Another condition for infection is the contact of healthy bushes with infected ones (only if they belong to the same species). Especially quickly the disease begins to develop on days when there is dryness and heat, and with sharp fluctuations in temperature and humidity. This is due to the fact that due to such weather conditions, the tension of the membranes of the vegetation cells is weakened, and as a result, favorable conditions are created for the development of the ashtray.
In this case, the incubation period with favorable factors for the disease is within 5-10 days. For example, at a temperature of about + 15 ° C, only five days pass from the onset of infection to the formation of conidia. The development of the sphere library is especially rapid after heavy rains, for example, a gooseberry bush can become covered with white bloom in just 2-3 days. Local infection becomes stronger if the planting of seedlings, vegetables, flowers, tree crowns is dense, the wind movement is small, and the air humidity is high.
Sexual reproduction is carried out through spore-bearing structures - cleistothecia. This is the fruiting body of the fungus, consisting of tightly intertwined hyphae and which contains a large number of spore bags. Inside they contain 4-8 ascospores, which, after release, form a new focus of infection. It is also important to know that the disease can appear if too much nitrogen fertilizer is applied to the soil.
Powdery mildew control
Start fighting this fungal disease should be timely. If for any reason you have to postpone this event, then the disease for a short time spread to large area your his garden plot. If the ashtray has already cleared up, then you will have to use not only agricultural techniques like thinning and loosening, but also resort to the use of fungicides and chemicals. In some situations, folk remedies can help. Pay attention to the common methods to resolve the described problem:
- Iodine. Take iodine, measure 10 ml with a syringe and dissolve in 10 liters of water. If there is no syringe, then count as drops. Moisten the leaves of infected vegetation with the resulting product. For roses, you can use a more concentrated solution consisting of 20 ml alcohol tincture iodine and 7 liters of water.
- Copper-soap solution. Mix 20-30 g of copper sulfate and 200-300 g of soap with 10 liters of water. For preparation, the first two components should be dissolved separately in a small amount of hot water, and then pour the copper sulfate solution into the soapy one, constantly stirring the resulting slurry. After that, it remains to strain the solution and spray the area with it.
- Copper-soda solution. Dilute 10 g of copper sulfate in a glass of water and pour into a solution of 50 g of soda ash, 200 g of soap (household, tar) and 2 liters of hot water. Then add water so that the total volume of the product is 10 liters. Mix thoroughly and strain.
- Fitosporin-M. Before use, dilute the product in accordance with the instructions. For example, to dilute Phytosporin powder, you will need to maintain a ratio of 1 g per 1 liter of water.
- Mouthwash. In the United States, gardening centers recommend using a universal ethanol-based mouthwash to get rid of the spherotheca. This product is antibacterial. Jeff Gillman states that this recipe is effective when mixed with 1 part of this liquid and 3 parts of water. At the same time, he warns that the resulting solution must be used carefully, otherwise they can damage the young leaves.
Preparations
Fungicides are often used to quickly solve the problem. Modern market offers a wide range of products to choose from. Some drugs are available in small packages for private household plots, while others can only be obtained through collective purchases, because. supplied only for Agriculture in large containers (Bayleton, Bravo, Quadris, etc.). You can get acquainted with known drugs in the table:
Name | Description |
Agrodoctor | Protects against ashtray for 4-8 weeks. It has a strong healing effect. Activity decreases in wet and cool weather. |
Chistoflor | Systemic fungicide for the protection of fruit and berry crops, which has a preventive, curative, eradicating effect. Well tolerated, highly effective against causative agents of ashpel, especially in suppressing the primary infection. It has a long protective effect and is quickly absorbed by vegetation. |
An effective tool for protecting crops such as strawberries, currants, raspberries, gooseberries. |
|
Means with a long-term preventive and pronounced therapeutic effect. The drug can quickly penetrate into the tissues of cultures, due to which it is not washed off by rain within a couple of hours after the treatment. |
|
Pureflower | Systemic fungicide used on many crops. It has high efficiency against causative agents of the sphere library. Absorbed quickly, has flexibility in terms of application. |
A preparation that quickly penetrates into vegetation tissues and is not washed off by rain a couple of hours after spraying. Has increased activity in warm wet weather. It has a long-term effect, due to which the number of treatments is reduced. |
|
Specialized highly effective remedy with preventive and healing effects. Stops the mycelium of the causative agent of the ashtray 2-3 hours after the treatment. |
|
Fungicide of protective, therapeutic and contact-systemic action. Penetrates into vegetation tissues within 6 hours and moves acropetally, while protecting young growing organs. The duration of the protective effect at the optimal concentration is from 10 to 15 days. |
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Effectively suppresses pathogens of fungal diseases on indoor plants and all types of garden crops. Reduces soil toxicity by restoring soil microflora after application chemicals protection or steaming. |
|
Remedy against bacterial and some fungal diseases of fruit, berry, flower, ornamental and vegetable crops. |
Folk remedies
The question often arises of how to deal with powdery mildew with improvised means without the use of fungicides. To protect cucumbers, gooseberries, grapes and other crops, you can resort to folk ways. A few effective tools to help solve the problem:
- Dissolve in a liter of water 4 g of soap and soda ash. Treat the infected vegetation with the resulting solution 2 times. Between spraying, maintain an interval of a week.
- Fermented water, which is prepared from weeds, also has good efficiency. Fill the bucket about half full with weeds (pre-shredded), then fill it hot water. The composition should be fermented for several days, then strain it. Processing is carried out in the evening.
- Pour cold water over fresh mullein - about 1/3 of a bucket. Let the mixture brew for three days, not forgetting to stir it from time to time. Filter the liquid with a dense cloth, mix with water 1:10. Carry out the treatment in the evening, constantly using fresh infusion.
How to get rid of powdery mildew
The disease reveals itself after flowering, when the tops of the shoots are covered with white bloom. Affected shoots begin to twist and dry out, and the leaves become twisted and pale. At the same time, there are specific pathogens that are characteristic of specific vegetation, for example, Oidium is the causative agent of grape ash, and fungi of the species Erysiphe cichoracearum and Podosphaera fuliginea infect a wide range of plants, especially melons.
On indoor plants
White plaque on the leaves of indoor plants will seriously affect the decorative effect of the latter, so take action in a timely manner. In room conditions, the ashtray can be found on gerberas, roses, begonias, cissus, violets, etc. The reason for its appearance is stagnant humid air and sharp temperature fluctuations indoors. If the lesion is small, then use a soda solution - dilute 5 g of soda ash in 1 liter of water, adding a little soap shavings. Treat with the resulting solution once a week.
Treat with special preparations (if the damage to the vegetation is severe), for example, fungicides Topaz, Thiovit, Skor, Vectra, Hom. Use them strictly according to the instructions without independently increasing the dosage and observing all precautions. A good option is Topaz, 1 ampoule (2 ml) of which is diluted in 10 liters of water. True, such an amount of solution is not needed when processing indoor flowers, so divide the ampoule into several treatments.
On bushes and trees
The sooner you notice the disease, the greater the chance of success. Remove all sluggish i.e. lost turgor leaves or shoots. If the fungus has affected bushy species, for example, peonies, petunia, then cut off as many of the affected shoots as possible. Radical pruning will increase the chances of solving problems. Burn plant residues and, in addition:
- Try replacing the topsoil near a shrub or tree. Sprinkle a layer of ash 1-2 cm thick on top.
- Spray diseased shrubs, trees with fungicides suitable for controlling ashtray. Make the treatment plentiful so that the shoots and leaves "bath" in the solution.
- Spraying is supplemented with a strait of earth. Carry out several treatments at a certain time interval (for more details, see the instructions for the drug).
on roses
Powdery mildew on roses is one of the most common diseases caused by the fungus Sphaerotheca pannosa. If you notice that your rose bushes have been affected by this disease, then remove all damaged parts and destroy them. Then carry out a thorough spraying using fungicides such as Skor, Thiovit-Jet, Baktofit, Fitosporin, Topaz.
Sulfur is an effective remedy, but if you use it in the first days of the appearance of an ashtray. As soon as you notice the first symptoms of fungus infestation, immediately spray them with a sulfur-based fungicide. The procedure should be carried out several times. The natural store of sulfur is garlic, the squeezed juice of which is used to create solutions for spraying roses. True, sulfur can be devastating, so you can spray a baking soda solution several times a week instead.
On flowers
Many gardeners are wondering how to get rid of powdery mildew on flowers. There is no one universal way to deal with this problem, because a whole range of measures is needed to solve it. In general, the methods used are practically the same as in the fight against ashes that have affected trees, bushes, and houseplants. To do this, you can use the folk remedies described above or chemical preparations like Topaz, Flint Star, Topsin M. These funds are quickly absorbed and spread through the vascular system of flowers without causing significant damage to them.
On vegetables
Powdery mildew on vegetables is treated with fungicides, folk remedies, but the fight against the disease on cucumbers is impossible without preventive measures. Prevention consists in observing the agricultural technology of culture and treating the beds with Quadris three times in strict accordance with the instructions. Spraying cucumbers with mullein also helps. Good results are obtained by dusting cucumbers with sulfur powder: 25-30 g per 10 m2. Remember to remove diseased parts before spraying.
It is advisable to treat tomatoes with a solution of sodium humate in accordance with the instructions - 1 time in 2 weeks. They do a good job and biological preparations, for example, 1% solution of Baktofit. In addition, Planriz culture liquid is used to control ashpel on tomatoes. Zucchini, on the other hand, can be saved by cutting off the affected leaves and shoots, which must be burned, and digging up the soil around the infected plants. To destroy the pathogen, use a solution of ash, cow dung or soda ash.
Powdery mildew prevention
Be sure to follow a set of measures aimed at preventing the disease. All infected plant debris should be destroyed immediately by burning all shoots and leaves showing signs of the disease. Weed the weeds, because. many of them are prone to being hit by a sphere library. But that's not all, there are several other preventive measures:
- Try to keep crop rotation. Do not plant susceptible crops in the same place.
- You need to buy seeds and seedlings of crops only those that have genetic resistance to diseases.
- The tool used for tying or trimming (secateurs, ribbons, ropes, etc.) must be disinfected.
- Ensure sufficient air circulation.
- Avoid crowding plantings, do not forget to thin out seedlings, seedlings.
- You should not overdo it with nitrogen fertilizers, but you need to make phosphorus-potassium agents regularly.
- If you resort to the principle of sprinkling, then water the berries and vegetables in the morning - they should be able to dry out during the day. It is better to give preference to the system drip irrigation- it will help keep the leaves dry.
Serum
A good option is to use curdled milk (kefir) or sour milk. To do this, you need to separate the serum, dilute it with cold water in a ratio of 1 to 10 - it is better to increase this concentration to 1 to 2-3 parts. With the resulting product, treat the plants affected by the fungus. Whey works best as a prophylactic. It is worth resorting to it if you notice infected weeds, trees, shrubs near your site. Currants, roses, gooseberries, etc. should also be protected.
Ash
As a good prevention of the sphere library and the treatment of already infected plants, ash treatment is used. For this purpose, you need to take 1/2 cup of wood ash (clean, sifted from debris), pour it with 1 liter of freshly boiled water. The resulting solution is infused for 2 days. After insisting, it remains to add 4 g of soap, previously mixed with a small amount of water. Strain the solution into a sprayer and treat diseased bushes twice with an interval of 7 days. Increase the number of sprays if necessary.