Diseases of roses: description and treatment. Photo

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The article presents diseases of roses: description and treatment, interesting facts about diseases of roses.

Diseases of roses: an introduction

Rose disease is a real torture for the gardener. Powdery mildew, rust, spotting, burns - all this can lead to a decrease in the fertility of the bush, the loss of decorative leaves and buds and to the sudden death of the plant. If possible, any of these ailments should be eliminated at the first symptoms. How to do this as correctly and efficiently as possible, without harming the rose at the same time, will be discussed in this article.

Diseases of roses: powdery mildew

Description of the disease. This fungal disease causes the appearance of a white sandy coating on young shoots, leaves and petals of the plant. Where plaque appears, the tissue of the flower becomes coarse and deforms.

Plaque is the mycelium of the fungus parasitizing on the rose, from which you have to protect the delicate plant.

If your flowers are hit by such an attack, this has several main reasons: excessive fertilization of the plant with nitrogen, lack of calcium in the soil in sufficient quantities, drought or rose growth in too sandy or, conversely, in too damp soil.
The causative agent of the disease hibernates in the buds of the flower in the form of mycelium. If your plant does not receive enough light or is in a too humid air environment, you should be prepared for the fact that sooner or later a white bloom will appear. Drafts, dry soil, temperature drops and other conditions that weaken the immune system of roses will help speed up this process. Tea and hybrid tea varieties suffer the most.

Some rose varieties such as Gloria Day are immune to powdery mildew due to their strong glossy foliage.

Treatment. Do not hesitate to treat powdery mildew - try to solve the problem at the first symptoms. A suitable medicine in this situation is Topaz, Purest color or Speed. However, if the temperature has risen above 22 ° C, it is better to use "Tiovit Jet". If one spraying was not enough, the procedure should be repeated when young shoots appear, until the plaque disappears completely.

Diseases of roses: description and treatment of rose rust

Description of the disease. In this disease, roses have orange tumors that bend and thicken the shoots. The disease is also fungal: spores settle on the blossoming buds of a flower in spring and form a barely noticeable orange bloom. They are carried by wind, water or planting material. If your roses picked up spores last year, get ready for the fact that this will be even worse: the disease hibernates right in the tissues of the flower and is not afraid of the cold.
A protracted illness causes a significant weakening of the plant: metabolism is hampered, not to mention that mushrooms take away the lion's share of food from the flower, the quality of photosynthesis decreases and the rose begins to "suffocate".

If the disease affects the plant too much, the leaves will begin to turn completely yellow and fall off prematurely.

In order to detect the disease in time and prevent further spread, always pay attention to the underside of the leaves of your flowers: they may contain early foci of spores, which will bring you a lot of trouble in the future.
Towards the end of summer, round black spots will begin to appear at the site of these foci; in this case, it is necessary to start treatment immediately.

Prevention. To keep your flowers from rusting, do not overuse one-sided nitrogen fertilizer. In the fall, thoroughly get rid of infected leaves: it is better to burn them altogether. In the spring, spray roses and the soil in which they are planted with copper sulfate. And in order to finally make sure that your plants are safe, loosen and mulch the ground around them so that the infection disappears.

Treatment. First of all, in order to save your roses, you need to cut off all spore-affected shoots and spray the plant with 1% Bordeaux mixture. After that, the plant must be sprayed again (from the day of budding). Instead of Bordeaux mixture (if it is absent), you can use "Copper oxychloride", "Abiga-Peak", "Ordan" or "Hom".

Diseases of roses: photo, description of black spot

Description of the disease. Another name for this fungal disease is marsonin: in honor of the fungus, its causative agent. In July-August, almost black spots begin to form on the leaves, the size of which varies from a couple of millimeters to several centimeters. Later, the leaves turn brown and fall off earlier than expected. Spots can also appear on the bark of young shoots.
Without foliage, the plant begins to give up all the accumulated energy into growth, as a result of which it weakens greatly and in the next season it will bloom much less abundantly.
Inside the leaves, the mycelium of the fungus that excites the disease grows, which is why radiant strands appear on the surface - around the spots.

The radiance formed by the mycelium of the fungus on the leaves of roses is easiest to see at the edges of the spots.

It is important to know that the denser your roses are planted, the more the mottling will appear. Also, factors that worsen the consequences of the disease are excessive shading and insufficient ventilation.

Treatment. The fight against spotting must be approached from different angles. The key healing methods are:
- The correct technology of caring for plants, which strengthens their immunity;

- Getting rid of diseased leaves with their subsequent burning;

- Preparations containing copper. During the growing season, they must be sprayed with diseased roses;

“Skor,” a systemic fungicide designed for the treatment and prevention of rose diseases, is also suitable as a healing drug that will help to defeat spotting.

The first spraying should be carried out as soon as the smallest signs of the disease are detected. Each of the following should be carried out after rain or heavy dew.

Bacterial cancer

Description of the disease. Rose cancer is a bacterial disease that affects the root collar of a plant, forming growths of various sizes on it. You may not even notice them, because they are often very small (1-3 cm in diameter). Their surface is soft and lumpy; it is formed by infected tissues, first white, and then brown and even black.
It is rare to find hardened growths that have spread further along the trunk and even along the branches. These are found in climbing and romantic roses. In such tumors, more dangerous nodules and tumors can form.

In fact, this disease is not unique to roses. The bacteria that cause it infect a wide variety of plant families. The disease begins in the wounded parts of the roots, where the bacillus enters through the soil, in which it can live for an extremely long time.

The factors contributing to the disease are excessive soil moisture and the amount of manure fertilization. Roots damaged during planting can also help the disease penetrate the flower.

Treatment: If you find that your rose has bacterial cancer, it is urgent to transplant the flower. When transplanting, destroy all foci of the disease and remove all small growths. None of them can be ignored. After removing the tumors, place the roots in a "bath" of 1% copper sulfate solution for five minutes. After that, rinse them thoroughly and dip them in the clay chatter solution. After planting, you should not fertilize the plant abundantly and dig up the soil around the root collar. Also, make sure that there are no insects in your soil that can damage the root again.

Branches burn

Description of the disease. Branch burn is a disease caused by a fungus that causes reddish-brown spots on the branches, similar in appearance to burns. Growing larger and larger, the spot encircles the branch, forming an influx of tissue around itself. Like a tourniquet that squeezed a vein, they pull over the branches and by the end of summer they fade.
If you are under cover during the winter season and keep your roses in an environment that is too humid, it can cause burns.

Prevention. The sooner you remove your winter shelter in the spring, the better for your flowers. From already infected, sick, dry branches must be removed and burned in time. Also, proper agricultural technology will help protect your flowers from disease. It is important to strive for good maturation of the wood until the end of the growing season of the rose.

Treatment. If you do encounter burns, immediately spray them with any preparation containing copper. Before covering the flower for the winter, remove any damaged shoots and make sure not to exceed the permissible humidity level. Also spray roses with Bordeaux or ferrous sulfate solution.

Cytosporosis

Description of the disease. Cytosporosis is also a fungal disease that exists everywhere. Not only roses are sick with it, but also many other plants: nuts and trees of various species.
Another name for this disease is infectious desiccation. In especially unfortunate years, it leads not only to the drying of individual shoots, but also to the death of the flower. Especially those plants that have been exposed to drought, cold or heat suffer from it.
The mushroom "settles" on the damaged areas of the bark of the stem of the rose. In this place, rust-colored growths that are clearly visible to the naked eye begin to appear. They protrude directly from under the bark, which by this time begins to fall off and die off.

At the border of healthy and infected tissue, the bark begins to crack. This can be the first loud signal for action.

After the disease kills the branch, it begins to move back towards the stem, infecting new shoots. So you need to act immediately.

Particular attention should be paid to cytosporosis, because its appearance indicates that the general condition of the rose is not the best. Most likely, she is weakened and should be given special care. Protect diseased flowers from any negative external influences.

Treatment. Begin with special attention to care for the flower: carry out procedures for cutting off diseased shoots and branches. If you want to completely get rid of a diseased branch and be sure that drying out does not repeat itself, when cutting, grab 5 cm of the living part of the stem. Also keep an eye on the soil in which the rose grows. Try to process and water it more often. Protect the plant from cold and heat.
Do not forget to spray the "sleeping" rose buds with copper sulphate and Bordeaux mixture. This will help temporarily stop the spread of shrinkage and give you time to properly heal.

Diseases of roses: a description of gray rot

Description of the disease. Gray rot is a disease primarily of the most beautiful part of roses - the buds, as well as the leaves and tops of the stems. Like cytosporosis, it attacks weak plants and especially prefers white and hot pink roses.The buds of flowers infected with Botrytis (an alternative name for gray rot) at some point stop blooming, begin to rot and eventually fall off. The leaves go through the same stages: drying out, rotting and falling off.
The infection hibernates in the form of mycelium, and in the spring it is carried by wind and insects through the air to nearby plants. That is why it is not advisable to "settle" strawberries, which are extremely susceptible to gray rot, next to roses.

Prevention. Try to plant your roses not too densely: planting too "tight" increases the risk of disease. Also, do not delay watering roses: evening "baths" are not conducive to health.

Treatment. Like any other fungal disease of roses, gray rot is treated according to the scheme already familiar to us: it is necessary to cut off all the affected parts of the flower and spray the plant with a Bordeaux mixture or a solution of copper sulfate. After that, spray it again from the day of budding.

Interesting facts about rose diseases

Remembering the diseases of roses, you can also remember the following facts:

- Foliage is the best indicator to check the health and resistance of your roses to various diseases. If the leaves are glossy, dense, and there is a wax coating on them, then the plant is healthy. Such leaves do not allow the disease to penetrate the flower and infect it.

-Unfortunately, there are no unhealthy roses. All varieties suffer from certain diseases, even if they are resistant to others. And if, buying a flower, you find the mark "disease-resistant", know that the rose will lose this quality in 5-6 years, because not a single virus or fungus stands still. They develop and adapt in your defense and soon, as a result, break through it. Therefore, only amateurs give birth to old varieties in their gardens.

-Diseases such as gray rot (botrytis) are especially dangerous during wet weather, so a less dense planting will allow the soil under your flowers to dry out faster and therefore provide protection to the roses.

-Constant humidity and the lack of the ability of the foliage to dry out also causes black spot. However, excessive dryness is also undesirable. Powdery mildew, other similar diseases and all kinds of pests, on the contrary, love drier places. Therefore, you always need to stick to the golden mean and do not underestimate the moisture level at which your flowers grow.

-Your flower care is also an important part of its protection from external threats. Well-groomed roses are less likely to get sick, and if the infection gets into them, they resist it much more successfully. Also in the garden, which is carefully looked after by far fewer pests and parasites.

Diseases of roses: description and treatment. Treatment with effective means

Flowers, no matter how much you want, cannot be protected from any external influence. Therefore, flower growers resort to using various medicines, such as:

Important: all solutions must be prepared in plastic or glass containers!

"Alirin-B" is a product created with the help of various beneficial microorganisms obtained from biological sources. It is used to heal plants from powdery mildew, and not only roses, hundreds of others.

"Glyocladin" is a substitute for the well-known drug "Trichodermina". Used in the treatment of countless fungal diseases in roses and many other decorative flowers.

"Gamair" - is used to cure all kinds of diseases caused by bacteria that appear in roses, such as spotting, burns, cancer, etc.

"Topaz" is a medicine - a systemic biofungicide that protects flowers and many other crops from powdery mildew. This drug has a wide range of possibilities: it can be used as a preventive, protective and healing agent in case you want to prevent many unpleasant diseases from developing in your roses.Also, "Topaz" can be used as a means of exterminating the disease in a really serious infection. To do this, use its increased concentration (up to 10 ml.) And do 2 treatments (1 treatment per week)
Even in an environment with an overestimated infectiousness, Topaz provides guaranteed protection against powdery mildew. It is completely non-phytotoxic and does not leave any trace on the sprayed plant. If you want to use it for prophylaxis, reduce the frequency of spraying. Moreover, it is absolutely safe for the environment and for other “inhabitants” of your garden.

What other drugs are suitable for treating roses for prevention or treatment

"Pure flowers" is a recently appeared medicine designed to protect flower and ornamental crops from diseases.
For correct use, the required dose of the drug is dissolved in a container of suitable volume with water. After that, constantly stirring the solution, gradually increase its volume to 5-10 liters. It is not advisable to leave the solution in reserve - it is better to use it immediately after preparation. After 2 hours, the drug will take effect. During the week after spraying, be sure to refrain from manual work on the site.

If you are an amateur in gardening, you should not experiment with mixing this medicine with other drugs: this can lead to undesirable consequences, while a properly prepared solution will have a healing effect within 4 days.

Also, as an alternative to this tool, you can buy "Raek".

Fundazol is a medicine for dressing the soil and protecting roses from a variety of diseases.
When using the agent, the container intended for etching is filled with water by a third. Then a suitable dose of the drug is added to the water and the mixture is thoroughly mixed with the slow addition of the missing amount of water.

Use the freshly prepared solution on plants in dry weather with a minimum wind speed, preferably before 10 am or 20 pm. evenings. Do not forget that the solution cannot be left in reserve. You can only use what you just cooked.

"Skor to protect roses" is a medicine that saves roses and many other ornamental plants from black spot. "Skor" is a systemic fungicide that has a preventive and regenerative effect. The ampoule with the active substance must be diluted in water.

Use the freshly prepared solution on plants in dry weather with minimal wind speed.

You should spend no more than one liter per plant or, in the case of roses, 10 liters. per 100 m2 of planting.

Like all other solutions, this one cannot be stored. After 3 days after spraying, it will be possible to go to manual work. Also, do not play "young chemist" and try to mix the solution with other pesticides. Also, the drug is harmless to other crops in your garden and all other plants, however, it is harmful to fish and a little dangerous to bees.

"Copper oxychloride" is a copper-containing product intended for saving ornamental plants and vegetables.
from diseases
When diluting the solution, it is supposed to dilute 40 g of Powder per 10 liters. water. Use the freshly prepared solution on plants in dry weather with a minimum wind speed, preferably before 10 am or 20 pm. evenings.
Does not contain phytotoxic elements.

Also remember that the drug is fatal to fish and bees. Do not under any circumstances process during the flowering period or near water bodies.

The best remedies for spraying roses from diseases.
This list will help you choose the best rose sprays if you have not yet been able to decide on this difficult choice.

"Abiga-Peak" is a medicine containing copper, which acts upon contact with the focus of the disease. Its purpose is to save the plant from fungal diseases.The product is effective for vegetables, ornamental and flower crops, as well as vines and various medicinal plants.

The product is used during the growing season of the plant by spraying its root.
The packaging of the active agent is designed for dilution in 10 liters. water.
First you need to dilute it in 1 liter. water, then bring the solution by stirring and gradually adding water to a volume of 10 liters. This creates a solution ready for spraying.

The procedure can be carried out both for prophylaxis and at the first signs of a fungal disease. Each organ of the flower should be evenly coated with a solution.

This drug can keep your flowers safe even in severe weather conditions. The active drug will stay on the plant even in hail due to the special adhering agent included in its composition.

Important! Abiga-Peak is fully compatible with any known insecticide and fungicide. It is absolutely safe for the environment and easy to use. Also, unlike many other drugs, it can be stored in case it was not used up on time.

In addition, this drug has an extremely positive effect on the quality of flowers and crops that grow on the sprayed plant.

"Tiovit Jet" is a remedy intended for the treatment of diseases of flower and fruit-bearing crops.
For use, it is necessary to dilute the dose of the product in 1 liter. water, then bring the solution by stirring and slowly adding water to a volume of 10 liters. This creates a solution ready for processing. It should be used in dry weather with minimum wind speed.

"Tiovit" is a medicinal preparation that acts upon contact with a plant, practically safe for all mammals, fish and bees.
The peculiarity of the remedy is that it has absorbed the strengths of many other drugs. Within 7-10 days, it guarantees flawless protection of the rose from external influences. It can be used both for the prevention and for the treatment of plant diseases in their first stages. Also, it does not conflict with other chemicals in any way.

"Colloidal sulfur" This drug is mainly used to heal plants from powdery mildew, as well as to get rid of many different types of mites. It is important to know that it will show its effectiveness only at a temperature of about 22C due to the peculiarities of its active substances.

To dilute the solution, the finished preparation is stirred in a container filled with warm water until thick, after which more water is slowly added, stirring the mixture evenly. After the mixture is ready, you should wait 2-5 hours.

For mammals, the drug is absolutely not dangerous and does not have a negative effect on plant leaves.

However, it is important to pay attention to the fact that most gooseberry varieties react extremely negatively to this drug, which makes it impossible to spray themselves or plants next to them.

Do not forget! Before starting the treatment of rose diseases, you need to thoroughly study the instructions for using the drug you need.

Diseases of roses