Powdery mildew on roses
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Powdery mildew on roses
All gardeners know the name Powdery mildew on roses, because this is one of the most unpleasant diseases and many different types of plants are ill with it. If you do not react to this disease in any way, the plants will simply die. Of course, when any of your plants dies, this is unpleasant, but when an ornamental bush dies, this is doubly unpleasant.
Next, you will learn how to avoid this terrible disease and how to get rid of it if it occurs.
Curious! The first time powdery mildew was discovered in Europe in the tenth years of the nineteenth century, it is believed that it originally appeared in America.
Powdery mildew on roses: the danger of disease
Various plants and species are very often infected with powdery mildew, so all gardeners and gardeners are aware of its existence.
The disease is caused by fungi, in the case of garden queens the fungus is called Sphaerotheca pannosaLew. var. rosae Voron. As the consequences of the disease indicate the wilting of the plant and the slowing down of its growth, decorativeness decreases, since the buds cannot open, the leaves change color to unpleasantly brown or black. As a consequence of the disease, the death of roses and other plants usually occurs. At the very beginning of the spread, the disease is already developing quite strongly and the plant begins to wilt.
What are the symptoms
The main symptoms of the appearance of powdery mildew are difficult to confuse with other diseases. The mycelium begins to cover the entire plant, starting with the leaves, a spider-like light bloom. The disease is called "dew" because when the spores matured, drops of liquid appear on the leaves. Closer to August, the plaque on the leaves acquires a brown tint and brown spore balls appear.
Peak of activity
Plants very often fall ill in June, since during this period the formation of fungal spores and their striking distribution take place. This mushroom is in a "dormant" state all winter on wintering plants. The disease spreads from the bottom of the plant to the top.
Powdery mildew on roses: reasons why a disease may occur
Too warm air, variable daytime temperatures and high humidity in the air contribute to the appearance.
The causes of the disease on the roses: 1) You have planted already ailing seedlings; 2) Improper care; 3) Plants growing too close; 4) A large number of nitrogen-containing dressings; 5) Lack of phosphorus and potassium in the plant; 6) Prevention was not carried out; 7) The presence of weeds in the immediate vicinity of roses; 8) Lack of air at the roots;
Spores can be spread by air and water, or from plant to plant. These mushrooms are nomadic, hibernate on weeds, then again appear on flowers.
Disease prevention
As mentioned, it is better to simply prevent the onset of the disease than to treat the flowers for a long and difficult time. Prevention in such a situation is very important.
Possible Precautions
Possible precautions: 1) Examine plants for powdery mildew; 2) Correct actions when planting bushes, the presence of a drainage layer, a certain distance between plantings, not windy places; 3) Cleaning of weeds and excess grass; 4) Adequate care, timely and not excessive watering; 5) Pollination of plants with special solutions; 6) Sanitary trimming and cleaning in the rose garden; 7) The correct choice of variety.
The most disease resistant varieties
Leonardo da Vinchi
"Wedding Bells"
"New Dawn"
William Shakespeare 2000
Rosarium Uetersen
Powdery mildew on roses: preventive procedures
Preventive measures are usually carried out before the spore wakes up - in spring and autumn. For this, copper-containing medicines are suitable by adding a soap solution to them. Fifteen grams of copper cupola, plus two hundred and fifty grams of laundry or baby soap, plus fifty grams of baking soda is equal to the required solution.
We also apply a solution of Benomil with a concentration of twenty-five hundredths of a percent, usually treated in the fall, when the leaves have already fallen, or in the spring before the bushes bloom. It should be sprayed every two weeks.
It is also possible to use fertilizers applied at the root, for example, a mixture of superphosphate and potassium nitrate.
Powdery mildew on roses: home control methods
Before using professional products, plants must be treated with folk mixtures. A number of useful recipes.
First recipe
You can spray the leaves with a mixed liter of whey, ten drops of ordinary iodine in ten liters of water. You need to spray every week.
Second recipe
Dissolve forty-five grams of baking soda and forty grams of laundry or baby soap in ten liters of water. You need to spray twice every seven days.
Third recipe
Manure aged for three days, filled with ten liters of water, is filtered and diluted in a ratio of one to ten.
Fourth recipe
Boil eighty grams of garlic in ten liters of water. Cool the mixture and spray the roses.
What are the rules for using folk methods
All folk remedies obey simple rules:
It is better to spray plants with various solutions in the evening, when there is almost no sun or its rays are not so hot. Spraying in the morning can cause leaf burns.
It is strictly forbidden to store folk remedies and it is important to prepare a new one every time so as not to destroy the plant.
Until the signs of the disease disappear, it is necessary to spray the plant, the minimum amount of spraying is two.
All affected parts must be cut off and burned before spraying and other treatments.
You prepare folk remedies yourself, and they do not infect a person, but the use of precautions and special "uniforms" like gloves, mask and boots is mandatory. I may have unexpected allergies to mixing your usual products!
Specialty chemicals
Homemade solutions help, but not always and not for everyone. Do not forget about special remedies that fight various fungal diseases.
In specialized stores, it will not be difficult to find systemic or bio-fungicides.
The most effective and used drugs: 1) Maxim; 2) Topaz; 3) Bactofit; 4) Speed.
There are biologically active agents that are widespread and beloved by gardeners: 1) Fitosporin-M; 2) Alirin-M; 3) Gamair; 4) Planriz;
The above products are not harmful to plants and the environment. They are less effective and have a shorter shelf life than chemical ones. When choosing them, more treatments will have to be carried out as a fight against the disease.
Tips for Correct Processing
Tips for correct processing: 1) Processing occurs every two weeks; 2) The best time for processing is evening; 3) Often mushrooms get used to it and stop responding to a certain drug, so they need to be changed;
More detailed instructions should be read directly on the product packaging.
It is important to know that body protection is imperative, chemicals can lead to burns and allergies, protection measures are the same as for home solutions. It is necessary to spray the preparations on the plants on a day with a slight wind and in which there was and will not be rain!
Powdery mildew on roses: conclusion
Powdery mildew is a really harmful disease for plants and precautions are necessary to preserve plantings.A lot of plant varieties are susceptible to the disease, and ornamental plantings are no exception. Now you know how to preserve your plant and prevent disease from taking over. Follow the directions above and your flowers will be exposed to powdery mildew. If preventive measures have not helped, use chemical and folk remedies, your plants will surely defeat the disease.