Powdery mildew can be found on many types of plants, both outdoors and indoors. V indoor conditions powdery mildew can be found on roses, gerberas, cineraria, Kalanchoe, begonias, cissus, violets. The cause of the onset of the disease is stagnant humid air and sharp fluctuations in room temperature.
The spread of powdery mildew occurs when a sick plant comes into contact with a healthy one, when watering, it is carried by insects, by a stream of air. Powdery mildew treatment should begin as early as possible.
The reasons for the appearance 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 is also carried out by contact of a sick and healthy plants, during watering, with a stream of air, as well as when carried by insects.
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The cause of the development of the disease can be the excessive use of nitrogen fertilizers, as well as a lack of calcium in combination with high temperature and humidity in the room. 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 linen grabs the stems and other parts of the houseplant. 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 the flowers can also be affected by downy mildew (peronosporosis), the external signs of which are similar to real linen. But, unlike real, 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 acquire a brownish color. 
Folk remedies for controlling powdery mildew on indoor plants
There are many folk remedies for powdery mildew that are safe for humans and plants. For example:
- soap and 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 with an interval of a week;
- whey solution: pour 1 liter of whey into 10 liters of water, stir and process 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 process the plants three times with an interval of three days;
- decoction horsetail: Pour 100 g of horsetail with one liter of water, insist for a day, simmer for two hours, cool, strain, dilute with water 1: 5 and carry out 3-4 treatments at intervals of five days. In undiluted form, the broth 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 to 10 l of water wood ash, stir, insist for 7 days, carefully drain, dissolve in the infusion 20 g of liquid or grated soap and treat the plant with this composition every other day;
- garlic infusion: 50 g of garlic pulp (chopped cloves and shoots of garlic) are poured with two liters of water, infused and filtered for two days. Use the infusion undiluted;
- infusion onion peel: 200 g of husks are poured into 10 liters of boiling water, they insist for two days, filter and spray the plants before flowering, after it and before leaf fall.
Special chemicals for powdery mildew on indoor plants
If powdery mildew has appeared on your flowers, the fight against it is most effective with the help of modern fungicidal agents. They have a detrimental effect on the fungus, stop the 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 selected drug).
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The most effective preparations for powdery mildew:
- Fundazol;
- Topaz;
- Acrobat MC;
- Previkur;
- Speed;
- Vitaros;
- Amistar extra.
A well-known fungicidal drug - phytosporin, active ingredient in which is a concentrate of bacteria Bacillus subtilis in powder from chalk and humates. Despite the fact that phytosporin is considered a remedy, it is practically useless against the existing powdery mildew. However, as a prophylactic agent, it will work flawlessly. 
Prevention of powdery mildew on indoor plants
Like most other plant diseases, powdery mildew is easier to prevent than 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 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;
- to carry out phosphorus-potassium supplements on time.
Another type of prophylaxis 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 should be done quickly, using a watering can with a diffuser. All branches should be poured entirely, without lingering for a long time in one place.
Short-term exposure is very hot water does not have time to harm the plants that have not yet fully awakened after winter. But the spores, the mycelium, like the causative agents of other diseases, are dying. A jet of steam under pressure, obtained with the help of a household steam cleaner, has a similar effect.
Powdery mildew is one of the 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 rose, spheroteka. This article will cover the following issues:
- How to recognize a 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 spheroteca?
- Description of varieties of roses resistant to powdery mildew.
Description of the disease.
Small whitish powdery spots appear on the foliage of the diseased plant, which, it would seem, can be easily erased. But the spots are formed over and over again, quickly growing throughout the leaf plate. Powdery powdery coating spreads to green shoots and flower stalks. As a result, the leaves curl up and dry up, the shoots do not develop well.
This powdery coating forms the mycelium of powdery mildew, consisting of conidia. Conidia are spores of asexual reproduction of the fungus during the summer period, which are easily carried by the wind to neighboring plants. Spheroteka is capable of hitting the entire bush in a few days. If you do not take urgent measures for treatment, the plant will be weakened, the shoots are immature. 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 - clestothecia. These are the fruiting bodies of the fungus, inside which the spores of sexual reproduction of the fungus are formed. In this form, the fungus hibernates, and in the spring the spores are released and again infect the plants.
Which contributes to the rapid development of the disease.
Powdery mildew develops rapidly at a temperature of 20-25 degrees and a relative humidity of up to 80%. Such favorable conditions for the disease are created:
- When warm weather sets in after the last rains, moisture begins to evaporate and the relative humidity rises.
- In thickened rose gardens with poor air ventilation, high humidity, which contributes to the development of the disease.
- The big difference between day and night temperatures is accompanied by strong dew.
- An excess of nitrogen-containing fertilizers contributes to the growth of young tender leaves, which primarily suffer from infection.
Prevention of powdery mildew on roses.
It is generally known that it is easier to prevent a disease than to struggle with it for a long time and painfully. Powdery mildew preventive maintenance will protect your flowers from many other fungal diseases.
Preventive measures:
- Removal of infected leaves, shoots and other plant debris on which the fungus spores can overwinter. Weeding around bushes.
- Do not rain the roses.
- When planting roses, keep the required distance between the bushes, because in dense plantings, due to poor air circulation, high humidity is formed.
- Use nitrogen fertilizers sparingly and only until mid-summer. Nitrogen promotes strong growth of young leaves and shoots, which are primarily attacked by powdery mildew.
- Potassium-phosphorus fertilizing promotes the maturation of shoots and buds and increases the resistance of the rose to fungal attacks.
- Spraying rose bushes and soil around with copper-containing preparations in early spring and late autumn.
- Prophylactic treatments with biofungicides (Fitosporin-M, Alirin-B, Planriz, etc.) give positive results.
- Purchase and plant roses that are resistant to powdery mildew.
Powdery mildew treatment.
If powdery mildew still gets to your roses, you need to start treatment as soon as possible. To combat this fungal disease, there are many contact and systemic drugs.
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 sulfate, iron sulfate.
Fungicides of systemic action penetrate into plant tissues, making juices destructive for fungal pathogens. The following drugs are effective against powdery mildew: Topaz, Skor, Raek.
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 residues around the bush.
- The best time to spray is in the morning or evening in dry, calm weather.
- Spray all parts of the plant thoroughly, trying to wet the leaves from both the top and the bottom. It is especially important to observe this rule when working with drugs of contact action.
- Since fungi can acquire resistance to fungicides, with repeated treatments it is necessary to alternate systemic and contact preparations.
Consider below the fungicides used to treat powdery mildew on roses in more detail.
- Verified and effective remedy powdery mildew treatment initial stage is colloidal sulfur. It is a contact fungicide. The powder is dissolved 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 decreases, so the concentration of the solution must be increased to 0.8-1%. At temperatures above 35 degrees, the leaves may burn from the drug. In extreme heat, sulfur does not need to be used.
- The contact preparation Tiovit Jet contains 80% sulfur and is similar in its action and method of application to colloidal sulfur. The solution is prepared at the rate of 30-80 g per 10 liters of water.
- The 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 l of water. If necessary, the treatment can be repeated after 10-14 days.
- The universal drug of systemic and contact action Skor is used both for the treatment and for the prevention of powdery mildew. 1 ml of the drug is diluted in 5 liters of lukewarm water. Speed is most effective at 14-25 degrees.
- The composition of the fungicide Raek is an analogue of the drug Skor, it has a long-term therapeutic and protective effect in a wide temperature range.
- Topsin M is a systemic prophylactic and therapeutic agent. To combat powdery mildew, 10-15 g of powder is diluted in 10 liters of water.
- Strobi is a systemic drug wide range actions. For spraying rose bushes, dilute 2-4 g of granules in 10 liters of water.
Folk remedies for combating powdery mildew on roses.
There are many popular ways to treat powdery mildew. These remedies are good as preventive protection and at the onset of the disease. In addition, some of the substances used serve as an additional source of nutrients and enhance plant immunity.
Spraying 3 times with baking soda helps to cope with powdery mildew.
- In 5 liters of water, 1 liter of milk whey is diluted, 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.
- Ashes are often used to treat roses. Pour 1 kg of sifted ash with a bucket of warm water and leave for 3 days. Drain the light infusion, strain and use for spraying rose bushes. For better adhesion, you can add a spoon laundry soap... Add water to the remaining sediment 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 process roses every 10-14 days for prevention. In case of illness, the treatment should be carried out three times at weekly intervals.
- 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 cooled solution is sprayed with bushes with a weekly 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 l of water) up to three times with an interval of 2-3 days.
Powdery mildew resistant rose varieties.
There is a wide selection 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- patio group rose. Bush up to 80 cm high. Terry flowers, scarlet color, size 5-8 cm, no aroma.
Augusta Luise is a hybrid tea rose with large apricot-pink flowers up to 15 cm, with a strong aroma. The bush is up to 120 cm high. The rose blooms all summer.
Galaxy
Galaxy- floribunda rose. Bushes 80-100 cm high, spreading. 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- Scrub rose with large salmon-yellow flowers 10-11 cm in size. The bush grows up to 2 m. The rose blooms profusely all summer long, has a strong aroma.
Aphrodite
Aphrodite- hybrid tea 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. Branching bush up to 1.5 m high. The rose blooms throughout the season.
Gold Spice
Gold Spice- floribunda rose with peach-yellow semi-double medium-sized flowers. The bush grows about 60-70 cm. The flowering is abundant, long-lasting.
It should be noted that the listed varieties of roses are resistant not only to spheroteca, but also to black spot.
Planting powdery mildew-resistant roses in your garden can make it much easier to care for your rose garden. Of course, one should not neglect preventive measures, 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 (according to scientific powdery mildew) is fungal disease... At first, it seems only whitish dust on the leaves, which can be washed off or wiped off if desired. But over time, the "dust" will grow, turning into "felt".
The attack of powdery mildew on a plant occurs in this way:
- Appearing on the surface of the sheet (on the street this often happens in the first weeks of summer, in an apartment all year round), fungi tend to penetrate into its pulp. Feeding on plant juices, the mycelium grows.
- The mycelium 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 surely succumb to the 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 grows fruiting bodies, which outwardly look like brown or black dots. This is how she prepares for wintering - the leaves with "fruits" will fall off and stay safely until spring, and when the warmth comes, the wind will blow, and the mushrooms will fly to new plants.
Powdery mildew pathogens
They are called powdery mildews. 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 a petiolate oak to a decorative red one, since fungi of various types will host on the trees.
Crops that are constantly affected by various fungi:
- peaches,
- gooseberry,
- grape,
- roses,
- cereals,
- pumpkin,
- cucumbers,
- beets (sugar).
As for indoor flowers, powdery mildew is most often found on violets (Saintpaulias).
How to deal with such a scourge
The first and foremost rule: do not postpone plant treatments until tomorrow. Powdery mildew spreads very quickly, so there is no time to waste.
Diseased shoots are removed from trees. All the top soil is collected from indoor plants; whole colonies of pests are often hidden in it.
Also, any plant needs to be treated with a fungicide. If the infection is not serious, you can start with folk remedies, but if it has gone far, it is better to immediately buy something effective. But in any case, you need to spray the plant (especially indoor) 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 better processed on open balcony). But these funds are the most powerful.
Look at your pharmacy for one of the following drugs:
- Bayleton,
- "But",
- "Quadris",
- "Speed",
- Topsin,
- "Topaz",
- "Tilit",
- "Tiovit Jet",
- Fundazol,
- Fundazim.
Important! After the first treatment, wait a week and carry out the second "sanitation", even if there are no more traces of powdery mildew on the leaves.
Biofungicides
These substances have a different plan: they are based on living bacteria that suppress the development of fungi.
Their main advantage is environmental friendliness. Therefore, they are allowed during flowering. fruit crops, as well as when the fruit ripens.
As for the drawback, it is still one: 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.
Qualitative biofungicides are:
- "Alirin-B",
- "Gamair",
- "Planriz",
- "Pseudobacterin-2",
- Fitosporin-M.
Ethnoscience"
Such recipes are also not the strongest, but they are not scary to use on the same gooseberry, on which the fruits are already ripening, which you so want to treat your children or grandchildren.
- Soap + soda. 1 liter water goes 4 g of soda (soda ash) and soap. Treat diseased plants with a spray bottle once, and again after 7 days.
- Ash tincture. 0.5 cups of ash (wood) pour 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 plants with this substance the same two times, but if necessary, you can and more often.
- Garlic. 25 g of chopped garlic are soaked in 1 liter of water. Let the water stand for a day. After filtering with this solution, you can spray plants (even indoor flowers).
- Serum. The one made from kefir or yogurt. This dairy product is diluted cold water, pouring 10 glasses of water into each glass of whey. Such a solution should be sprayed on diseased plants.
- Potassium permanganate. 2.5 g of this substance is dissolved in 10 liters of water. Plants are processed every 5 days, 2 or 3 times.
- Copper sulfate. This substance itself is a purchased fungicide, but it is so old and tested for so long that many completely trust it and consider it almost a folk remedy. You need to use it for powdery mildew like this: 5 g of vitriol is diluted in a glass of hot water. In another dish, the soap is diluted in a ratio of 1:10. Vitriol is injected into the soap in a thin stream (this amount is calculated for 50 liters of soap solution).
More recipes that can be applied even during the fruiting period of "patients", you will learn from this video:
But, of course, the most popular folk remedy for powdery mildew is soda. In this video, you will not only learn how to apply it experienced gardener but also hear real live feedback.
Of course, you shouldn't wait that it is - Magic wand, but soda is not scary to apply to fruits that children can pluck tomorrow:
Prophylaxis
- Do not let the tops of the vegetable gardens lie until spring, burn them in the fall.
- In the beds, stick to crop rotation without planting related crops in one place for two years in a row.
- Now there are a lot good varieties vegetables. Choose disease resistant hybrids.
- If last year on your site you encountered powdery mildew, already at the beginning of summer you can arrange for preventive treatment of the vegetable garden (garden, flower bed) with the same fungicide (or, for starters, at least with 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 apply to removing affected branches).
- You should not feed the plant with nitrogen fertilizer, experienced gardeners they claim that this only aggravates the development of powdery mildew.
- Immediately remove the infected flower from healthy flowerpots of its kind. Arrange a temporary quarantine window sill.
- Do not spray the plant to prevent water droplets from spreading the fungus to other leaves. Also don't put it near open window(after all, a breeze, even a light breeze, is another spread of the disease). If the plant is planted in open ground, try to postpone watering (or pour water exclusively at 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 appears as a white bloom on plants, which has formed a mycelium fungus. At first, the plaque looks like a cobweb. Over time, it becomes similar to a powder. The plaque is striking on both sides of the leaf.
Young branches and leaves are most often affected: they contain a lot nutrients required mycelium. The danger for plantings is that the fungi quickly spread throughout the plant.
Description and signs of the disease
Most vulnerable plants
Powdery mildew is sick only deciduous plants: , and even . Also, this disease causes great harm to such ornamental plants, as well as 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 into the leaves and begins to feed on the nutrients inside the leaf. The fungus grows and forms a mycelium. Over time, the spores of the mycelium burst, and the seeds of the mushrooms "fly" to neighboring leaves or plants.
How to deal: 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;
- you must also watch out for fallen leaves: they should not lie on the ground.
Use less. Better to replace them with sodium phosphate (in remission). During the period of illness, it is not recommended to fertilize the soil at all. Let's see which powdery mildew remedy helps for each class of plants. On vegetables
- ... In case of a disease of vegetables, it is necessary to remove the damaged parts of the plant. From folk remedies, applying sulfur powder in a ratio of 25-30 g per 10 sq. m. A solution of colloidal sulfur also helps: for 35 liters of water, 25-30 g of sulfur. Of the drugs for the treatment of cucumbers, and are suitable. Read the instructions before use.
- ... The disease appears in two ways: either at the edges of the leaves begin to dry out and over time the young plant dies, or appear yellow spots on the top of the sheet. In this case, plaque is visible only on the back of the leaves of vegetables. Over time, it appears on the upper side of the plant's leaves. If the tomatoes are sick, they must be sprayed with a solution. Read the instructions when spraying. Helps with this disease and "Baktofit". It is necessary to process it 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 such drugs as, "Byleron" and. It is advisable to add laundry soap to the solutions of these drugs.
Did you know? To create 1 ton tomato paste it is necessary to grow 5.8 tons of tomatoes.
- ... The land around the diseased zucchini is necessary. It is also necessary to spray this plant with a solution from or. Of the drugs, you need to use "Kefalon", as well as sodium phosphorus.
- You can cope with the disease thanks to a solution of soda ash or with the help. 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 fight against powdery mildew. You can treat shrubs using 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 oxychloride.
- ... Gooseberries are treated with kefir, manure, soda, infusion of hay, ash, horsetail decoction. Help for the recovery of the bush and "Gaussin" 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. Grapes are treated (at +20 ° C and 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 fruit, it is best to use a weak solution of potassium permanganate. Among the chemicals that help to 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 therefore dangerous for apple trees and garden trees, which may decrease the protective function of trees to frost, which means that the apple tree may not overwinter. In addition, this disease halves the yield of apples. To protect trees, you can treat them with soda ash along with soap and copper oxychloride. Apple trees are treated with "Topaz" with a break of 6-12 days . Remove all infected tree branches before starting treatment.
- ... This disease manifests itself on strawberries in the form of plaque on the back of the leaves. As the disease progresses, it spreads to whiskers and plants. The fruit 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, you can treat it with "Fundazol". Carefully process the strawberry leaves on both sides and do not forget about the instructions for these preparations.
In addition, in the struggle for good harvest, "TMTD" or 1% suspension of colloidal sulfur will help you. On garden flowers
- also suffer from powdery mildew, it 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 flowers must be 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 also "Maxim" will help you to cure them. In the 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 petunia, all diseased parts of the plant must be removed. 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 soil layer 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 abundant watering, a large amount of nitrogen fertilizer, or in very warm weather. Powdery mildew can be cured with the help of Morestan, Topsin-M, soda ash and soap, or with Fundazol.
On indoor plants
White bloom on indoor plants, which appears when the temperature drops or the air is stale in the room, is powdery mildew. This white bloom on indoor flowers it is dangerous because if the plants are located 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 tincture of garlic. Soda ash will also help.Of the chemical medicines, Bayleton, Topaz, or the best will help. Before using the drug, read its instructions. 
Prevention of the appearance
It is known that any disease is easier to prevent than to cure. Let's figure out what are the methods of preventing plants from powdery mildew.
- Whey solution. Combine 1 liter of whey with 10 liters of water. Then the solution is applied to the damaged stems at least 3 times with an interval of 3 days.
- Broth 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, calculating 1 liter of solution per 5 liters of water. This solution should be sprayed on the bushes. Store the solution in a warm place for no more than 7 days.
- Mustard. 1-2 tbsp. 1 liter of dry mustard is diluted with 10 liters of hot water. Cool down. Next, either water the ground with a solution, or spray the plant.
- Copper sulfate. 5 g copper sulfate dissolve with 1 tbsp. water. Additionally, 50 g of soap is diluted in 5 liters of water (warm). The vitriol solution is combined with soapy water... The plant is sprayed 2-3 times a day at intervals of 6-7 days.
- Manure tincture. Infused 1 kg of manure for 3 liters of water. After that, the solution is diluted with 3 liters of water. Used as a spray on shrubs.
- Baking soda and soap. Dissolve 1 tbsp in 4 liters of water. tablespoons of soda and ½ teaspoon of soap. Spray 2-3 times a day at intervals of 6-7 days.
- Ash and soap solution. Add 1 kg of ash to 10 liters of warm water. During the infusion, the solution is stirred. After that, it is poured into a clean dish and liquid soap is added. Use as a spray. Add 10 liters of water to the remainder of the ash solution and water the bush.
- Potassium permanganate. 5 g of potassium permanganate is diluted with 1 liter of water. Spray 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. The soil and the plant are sprayed 2-3 times with an interval of 7 days.
I would also like to dwell on preventive measures for the treatment of individual, most common green plants.
- Cucumbers. Prevention is correct fit and care, as well as spraying with Quadris.
- Tomatoes. To prevent powdery mildew, it is necessary to soak tomato seeds in a solution from 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 the spring. Folk methods sprayed every other day in dry weather.
- Grape. A sulfur solution is used - 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 over-plant your strawberries. Weed it in time and replant those bushes that are too close to the "relatives".
- Phlox. Mulching with humus or peat. In the spring, phloxes are treated three times with 1% Bordeaux liquid. The procedure is repeated after 12-14 days. It is also necessary to fertilize the flowers with mineral fertilizers.
- Roses. Weed in time. In the fall, it is advised to collect and burn the vegetation in the garden, and dig up the soil.
- Indoor plants need potash-phosphorus fertilizers, airing the room, proper watering and general flower hygiene to combat powdery mildew.
Kirill Sysoev
Callous hands do not know boredom!
Content
What is powdery mildew
This disease, which is also called ashes, linen, is a fungal infection of a plant caused by microscopic fungi from the order of powdery mildews (Erysiphales). This disease is prone to a large number of vegetable, fruit, berry, ornamental plants... They are very susceptible to American ash or spherotek garden flowers... Sometimes, with a cut from a garden or a store, this fungus also gets on houseplants.
Causative agent
Whitish bloom is a mycelium that lives off vegetation. Reproduction occurs through spores that look like small balls Brown color... Before looking for a suitable powdery mildew remedy, 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. Microorganisms-pathogens include:
- Erysiphe communis - is the cause of sugar beet infection;
- 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 - infect a wide range of plants.
Symptoms
This fungal disease is easily identifiable, because has characteristic symptoms. It begins with the appearance of white spots. small size on the top of the sheet. Gradually, these spots begin to grow until they cover the entire leaf. Then they move to the whole aerial 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. Upon examination, you can see that the leaves are covered with thin layer cobwebs or cotton wool - this is the white mycelium of the fungus.
Concerning fruit trees, then they begin to disrupt the growth of the bush, and on maturing shoots the wood ceases to ripen. As a result, the bush suffers from frost - this is especially detrimental to the grapes. In addition, the spheroteka quickly moves from leaves to fruits and ovaries. As a result, you can be left without a crop, because fruits affected by a white bloom cannot be eaten. With vegetables it is a little more difficult, because tropical vegetation expends a lot of nutrients for fruit production and overall growth. They often do not cope with the infection and simply die.
How it spreads
White bloom on flowers and leaves can be sprayed when watering other plants. The wind also contributes to this. Another condition for infection is contact of healthy bushes with infected ones (only if they belong to the same species). The disease begins to develop especially quickly 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 vegetation cells weakens, and as a result, favorable conditions are created for the development of ash.
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 spheroteka occurs especially rapidly after heavy rains, for example, a gooseberry bush can become covered with a 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 - clestothecia. This is the fruiting body of the fungus, consisting of tightly intertwined hyphae and which contains a large number of spore sacs. Inside they contain 4-8 ascospores, which, after being released, form a new focus of infection. It is also important to know that the disease can appear if too much nitrogen fertilizers are applied to the soil.
Controlling powdery mildew
You should start fighting this fungal disease in a timely manner. If for any reason you have to postpone this event, then the illness for a short time will extend to large area your his garden plot... If the ashstone has already cleared itself, then you will have to use not only agricultural techniques such as 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 for resolving the described problem:
- Iodine. Take iodine, measure out 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, then pour the solution of copper sulfate into the soap, constantly stirring the resulting slurry. After that, it remains to strain the solution and spray the area with it.
- Copper-soda solution. Dissolve 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 to bring the total amount of product to 10 liters. Stir well and strain.
- Fitosporin-M. Dilute the product as directed before use. For example, to dilute Fitosporin powder, you will need to adhere to a ratio of 1 g per 1 liter of water.
- Mouthwash. In the United States, horticultural centers recommend using a universal ethanol-based mouthwash to get rid of spheroteka. This product is antibacterial. Jeff Gillman says this recipe works well when you mix 1 part of this liquid with 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.
Drugs
For a quick solution to the problem, fungicides are often used. Modern market offers a wide range of these products to choose from. Some of the drugs are available in small packages for private household farms, while others can be obtained only in collective purchases, because supplied only for Agriculture in large containers (Bayleton, Bravo, Quadris, etc.). You can get acquainted with the known drugs in the table:
Name | Description |
Agrohealer | Protects against ash 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 prophylactic, therapeutic, eradicating effect. Well tolerated, highly effective against pathogens of ashtrays, especially in suppressing primary infection. It has a long-lasting protective effect and is quickly absorbed by vegetation. |
An effective remedy for the protection of crops such as strawberries, currants, raspberries, gooseberries. |
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A remedy 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. |
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Pure bloom | Systemic fungicide used in many crops. It has high efficiency against the pathogens of the spherotek. It is absorbed quickly, has flexibility in terms of application. |
A preparation that quickly penetrates into the tissues of vegetation, which is not washed off by rain a couple of hours after spraying. Has increased activity in warm wet weather... Has a long-lasting effect, due to which the number of treatments is reduced. |
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A specialized highly effective product with a preventive and healing effects... Stops the mycelium of the causative agent of the ashes 2-3 hours after the treatment. |
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Fungicide of protective, therapeutic and contact-systemic action. It penetrates into the tissues of vegetation for 6 hours and moves acropetally, while protecting young growing organs. The duration of the protective effect at optimal concentration is from 10 to 15 days. |
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Effectively suppresses the causative agents of fungal diseases on indoor plants and all types of horticultural crops. Reduces soil toxicity by restoring soil microflora after application chemicals protection or steaming. |
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A remedy against bacterial and some fungal diseases of fruit and berry, flower, ornamental and vegetable crops. |
Folk remedies
The question often arises of how to deal with powdery mildew with improvised means without using fungicides. To protect cucumbers, gooseberries, grapes and other crops, you can resort to folk ways... Several effective tools to help solve the problem:
- Dissolve 4 g of soap and soda ash in a liter of water. Treat the infected vegetation with the resulting solution 2 times. Maintain a weekly interval between sprays.
- Fermented water, which is prepared from weeds, also has good efficiency. Fill the bucket about halfway 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 the bucket. Let the mixture brew for three days, remembering to stir it from time to time. Filter the liquid with a thick cloth, mix with water 1:10. Treat 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 a white bloom. Affected shoots begin to bend and dry out, and the leaves become curled 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 bloom on the leaves of indoor plants will seriously affect the decorative effect of the latter, so take action in a timely manner. In indoor conditions, an ashtray can be found on gerberas, roses, begonias, cissus, violets, etc. The reason for its appearance is stagnant humid air and sharp temperature fluctuations inside the room. 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 drugs (if the damage to the vegetation is severe), for example, fungicides Topaz, Tiovit, Skor, Vectra, Hom. Use them strictly according to the instructions without increasing the dosage yourself 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 better your chances of success. Delete all sluggish, i.e. leaves or shoots that have lost turgor. If the fungus has infected bushy species, for example, peonies, petunias, then cut off as many of the affected shoots as possible. Drastic pruning will increase the chances of solving problems. Burn off plant residues and, in addition:
- Try to replace the topsoil near a shrub or tree. Pour a layer of ash 1-2 cm thick on top.
- Spray diseased shrubs, trees with fungicides suitable for controlling ashtrays. Make the treatment abundant so that the shoots and leaves "bathe" in the solution.
- Supplement spraying with soil spillage. Carry out several treatments at a certain interval of time (for more details, see the instructions for the preparation).
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 undergone this ailment, then remove all damaged parts and destroy them. Then carry out a thorough spraying using fungicides such as Skor, Tiovit-Jet, Baktofit, Fitosporin, Topaz.
Sulfur is an effective remedy, but if you use it in the first days of the appearance of the ash. As soon as you notice the first symptoms of fungal growth, spray them immediately with a sulfur-based fungicide. The procedure should be carried out several times. The natural guardian of sulfur is garlic, the squeezed juice of which is used to create spray solutions for roses. Sulfur can be destructive, though, 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 cope with this problem. to solve it, a whole range of measures is needed. In general, the methods are used almost the same as in the fight against ashes that hit trees, bushes, houseplants. To do this, you can use the above-described folk remedies or chemicals like Topaz, Flint Star, Topsina 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 agricultural practices and three-fold processing of the beds with Quadris in strict accordance with the instructions. Spraying cucumbers with a 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 process tomatoes with sodium humate solution in accordance with the instructions - once every 2 weeks. They do a good job and biological products, for example, 1% Baktofit solution. In addition, Planriz culture liquid is used to control the ash on tomatoes. Zucchini can be saved by cutting off the affected leaves and shoots, which need to 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.
Prevention of powdery mildew
Be sure to adhere to a set of measures aimed at preventing the disease. All infected plant debris must be immediately destroyed by burning off all shoots and leaves showing signs of disease. Weed the weeds as many of them are prone to damage by spheroteka. But that's not all, there are several other preventive measures:
- Try to follow the crop rotation. Do not plant crops that are susceptible to fungal infestation in the same area.
- You need to buy seeds and seedlings of crops only those that have genetic resistance to diseases.
- Tools used for tying or cutting (pruning shears, tapes, ropes, etc.) must be disinfected.
- Provide sufficient air circulation.
- Avoid crowding plantings, remembering to thin out seedlings, seedlings.
- You should not overdo it with nitrogen fertilizers, but you need to apply phosphorus-potassium funds 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. Better to give preference to the system drip irrigation- it will help keep the leaves dry.
Serum
A good option is to use yogurt (kefir) or sour milk. To do this, you need to separate the whey, 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. Use the resulting product to treat plants affected by the fungus. Whey works best as a preventive measure. 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
Ash treatment is a good prevention of spheroteca and treatment of already infected plants. For this purpose, you need to take 1/2 cup of wood ash (clean, sifted from debris), pour 1 liter of freshly boiled water over it. The resulting solution is infused for 2 days. After insisting, it remains to add 4 g of soap, premixed with a little water. Strain the solution into a sprayer and spray the diseased bushes twice with an interval of 7 days. Increase the number of sprays if necessary.