Diseases of indoor roses description with photos. How to spray roses for diseases: the best drugs

The rose is the decorative blooming queen of the garden. It has been a symbol of love and admiration since ancient times. Today, this plant is often used in landscape design and decorating gardens. Garden and home roses diseases and pests quite often affect. The lack of proper care and the lack of entrepreneurial spirit of flower growers is one of the reasons for the death of this flower.

Pests - prevention and control

Carrying out timely measures, both preventive and protective, will protect the rose garden from diseases and the invasion of harmful insects.

Any preventive treatment of roses is carried out strictly according to established rules safety technology. After all, chemicals that are harmful to the human body are used for this. A respirator and rubber gloves are the first two things every grower should have.

The greatest danger to the rose garden is pests during the period of active growth and development of plants. At this time, roses release new shoots, leaves and flower buds, which are food for larvae and insects. Plants require frequent inspection and attention.

Sawfly larvae, beetles and caterpillars are chewing insects that disrupt the life processes of flowers. As a result, plants bloom poorly and stop their growth. The appearance of these pests is evidenced by: perforated eating of pulp, gnawing leaves and stems, damage to flower buds from the outside.

Pests that suck juice from the ground part of plants provoke a violation of the growth and development of flowers. As a result, the leaves of plants turn yellow, curl and eventually die. Sucking insects that cause tremendous harm to roses include rose whiteflies, scale insects, mites and aphids.

Rose aphid is a harmful insect that settles on roses mainly from the underside of leaves, shoots, stems and flower buds. A massive invasion of aphids can be observed with the naked eye during the inspection of the flower, despite the fact that the aphid larvae are very small. These pests reproduce very quickly. 7 days after the appearance of the larvae turn into females. Each individual can give offspring - about a hundred larvae. During the year, this insect reproduces up to ten generations, which by the end of the summer season are transformed into individuals of two sexes with winged forms. During the winter, they lay eggs for the emergence of new larvae in the spring.

These insects grow very actively, sucking the juice from the entire ground part of the plants. Rose bushes affected by aphids develop poorly, their leaves curl and fall off, and flower buds are ugly when open. It is worth knowing that such plants become vulnerable to diseases and do not tolerate cold. The mass appearance of ants in the rose garden is a sign that aphids have settled on rose bushes.

The seven-spotted ladybug is an insect that loves to eat aphids. She eats up to 250 aphid larvae per day.

For preventive purposes, plants are sprayed in early spring, even before the buds swell with contact insecticides. This is followed by treatment with Actellik, Korbofos or Metation. Kerosene solution is also effective - 2 g of the substance is added to one bucket of water.

Some flower growers use garlic-bulb infusion, which is prepared as follows. Chopped onion and garlic, 300 g each, are mixed with 400 g of chopped tomato leaves. The prepared slurry is placed in a three-liter container, filled with water and tightly closed for six hours for infusion. After this time, the infusion should be mixed well, strained through gauze and brought to ten liters of volume with plain water. To improve contact with foliage, liquid soap is added to the solution. This is an excellent tool in the fight against spider mites, aphids, caterpillars, suckers and sawflies. The frequency of treatment is five times a day for a week.

This is an insect that very often appears in rose gardens and causes great harm to plants. The appearance of this pest is evidenced by white spotting on the leaves, which eventually becomes marbled. Bushes affected by cicada quickly lose their decorative effect. In severely damaged plants, the foliage turns yellow very quickly and falls off. From the eggs laid by the female in autumn, which are located at the ends of the shoots, larvae emerge in early spring. They can be observed on the underside of the leaf plate. Insects white color, sedentary suck the juice from the foliage of plants. In adults, the body is elongated, light yellow color. Leafhoppers in adulthood are very active and mobile. Females can produce up to three generations per year. The treatment of affected bushes is carried out at the stage of the mass appearance of pest larvae with an insecticidal solution. ground part plants are sprayed twice every ten days.

Roses are especially dangerous spider mite. AT greenhouse conditions these pests can breed and develop throughout the year. They are a four-legged insect of light green color with black spots on the back. In winter, the body of the tick acquires a red or orange color. One female can lay up to 170 eggs, of which larvae will appear in five days. The tick development cycle is 15-25 days. The insect lives no more than thirty-five days. Both larvae and adults infect the lower part of the leaf plate of plants, sucking the juice out of them, which leads to metabolic and vital functions of roses. Dehydrated leaves first turn yellow, then curl and fall off. Roses affected by spider mites lose their decorative qualities very quickly. Spider mite females tolerate wintering very well, staying in the soil or in other secluded places. In early spring, when the air temperature is about 13-14 degrees, the females begin to lay light pink eggs, which can be seen through a magnifying glass.

On indoor roses, spider mites appear in rooms where the air is too dry. To increase the level of humidity, plants are sprayed frequently. This is one of the main preventive measures that prevents the appearance of this pest. Affected specimens are sprayed with Acrex - 0.08% concentration. Also, Isofenin is suitable for the destruction of spider mites - 0.05% concentration or Omite with a concentration of 0.1%. For plants in greenhouses, Fitoverm, Aktofit or Vermitek are used. It is worth remembering that such drugs do not have any effect on eggs. They only kill adults. To do this, rose bushes are sprayed 4-5 times every three days at a temperature of 30 degrees.

Other common pests

Rose diseases - infectious and fungal

In addition to pests, garden roses, just like domestic roses, can infect various diseases. I would like to note that among all the varieties of indoor flowers of the Rosepovnikov family, the Chinese rose needs special care and attention. From a lack of lighting, irregular watering, an overabundance or lack of nutrients, it weakens. Its resistance to diseases and pests is reduced.

Most often, indoor roses, just like garden roses, suffer from fungal infections that affect all parts of the plant.

This disease appears on young leaves and branches. More often this disease affects indoor roses. You can eliminate the risk of powdery mildew if you provide flowers right conditions growth - moderate air humidity, not less than 60%, and temperature regime within 17-18 degrees. A sign of the onset of this disease is a powdery coating of a grayish hue that covers the leaves, stems and flowers of the plant. Over time, it develops into a continuous mass on the surface of the affected part of the flower. This disease disrupts all life processes and destroys plant tissues. As a result of this, the leaves curl and fall off, and young shoots die off.

What to do?

In autumn, the affected flowers are pruned, burning the damaged parts. Then a thorough digging of the soil is carried out, after which the larvae and insects die from a lack of oxygen.

Immediately after pruning in autumn or early spring, the bushes are irrigated with a three percent solution of copper sulfate in combination with a solution of iron sulfate of the same concentration. Such prevention reduces the risk of the onset of the disease in the next year.

During the growing season, flower growers began to successfully use a copper-soap solution to treat roses. Three hundred grams of liquid soap and thirty grams of copper sulfate, previously diluted in one liter of water, are added to nine liters of water. Processing is carried out every eight days.

Fungal disease - marsonina

Black-brown spotting on the foliage is the first sign of the appearance of this disease. The peak of manifestation of marsonine falls on July-August. Leaves, petioles and stipules are covered with dark brown spots. AT advanced cases leaves completely darken, die off and fall off. The mushroom picker with spores remains to winter on the foliage and branches of roses.

What to do?

It is necessary to fight this disease thoroughly. All affected parts on the bushes are cut and burned. After that, digging of the earth is carried out with the turnover of the reservoir. In early spring, before the buds open, the bushes are sprayed with special chemicals.

This disease, which appears in the form of orange dusty circles, resembling sores in appearance. This fungus loves moist and warm environments. Therefore, the risk of rust on roses in the spring under such conditions increases significantly. In this case, the vegetation process is completely disrupted in plants. Affected flowers become oppressed - leaves and shoots dry out over time, and flower buds become deformed.

What to do?

Before starting treatment, the damaged parts are cut off on the bushes. Then carry out the digging of the soil. Before wintering, plants are treated with iron or blue vitriol. In the spring, during the period of active growth, until the moment of flowering, roses are sprayed with a solution based on copper and laundry soap.

Yellowed or whitened leaves are a sign of the onset of this disease. Most often, roses suffer from chlorosis, suffering from a lack of nutrients in the soil - zinc, manganese, iron, magnesium and other elements. Very often flower growers who have a Chinese rose complain about this disease.

What to do?

First you need to identify the cause. To do this, analyze the soil or flower. After that, the plant is replenished with the missing trace element.

This is one of the most dangerous diseases of roses, which actively develops in conditions of high humidity or heat. The leaves of roses become covered with brown spots and die off completely after a while.

What to do?

To prevent the occurrence of this disease, the flowers are sprayed with one of the fungicides. This procedure is carried out in rainy or hot weather.

Give your roses proper care, spend preventive measures and frequent inspections, and then you will not have to resort to extreme methods to save your rose garden from diseases or pests.

Unfortunately, all indoor plants are susceptible infectious diseases, which cause various bacteria, fungi, viruses. And non-communicable diseases that are promoted by unsuitable conditions environment. And although indoor roses are not as capricious as some other types of plants, pests and diseases still do not bypass them. Diseases of indoor roses are quite difficult to cure, so it is much easier to prevent them than to treat them. This is easy to achieve if you properly and timely care for them.

Diseases of indoor roses

First of all, young and weakened plants, as well as those that have not been provided with proper and attentive care, are susceptible to diseases. One of the most common fungal diseases indoor plants is powdery mildew. The main reasons for its occurrence can be poor ventilation of the room, crowding of plants in one place, as well as excessive fertilizer. The disease is characterized by a white coating on the stems and leaves of the plant. With its development, the leaves gradually dry out, curl and eventually completely fall off. Treatment is carried out by removing the affected shoots, leaves and buds and treating them with topaz, fundazol, etc.

Another disease similar to the previous one is downy mildew. Very often these two diseases are confused with each other. The difference is that with downy mildew white coating of fungal spores covers, as a rule, only the underside of the leaves. On their upper side, yellowish or light spots can usually be observed. This disease is spreading very quickly wet leaves. Treatment consists in removing the affected shoots, leaves, buds and treating with a fungicide. In order for the fungi not to get used to a particular drug, it should be periodically replaced with another from the group of fungicides.

If weeping brown spots appear on the leaves of a room rose, gradually increasing in size, which later merge and affect the entire leaf completely, then these are signs of another disease called spotting. It is both bacterial and fungal in nature. Most often, the disease manifests itself in the second phase of the growing season. Treatment is carried out by removing the affected shoots and leaves and spraying with any preparations containing copper (copper sulfate, Bordeaux liquid, oxychom) or topsin and foundationol. It is also important to reduce watering of affected plants and stop spraying them until they are fully recovered.

If the leaves of your plants are covered with red, orange or dark brown pads small size(pustules), they were struck by the so-called rose rust. Its occurrence is facilitated by insufficient and improper care of indoor roses. It is very important to create optimal conditions for the growth and development of these plants - to ventilate the room in time, to avoid high air temperatures and high humidity. Treatment in this situation is mainly to remove all suspicious leaves, since spraying with fungicides can not always stop the development of the disease.

Pests of indoor roses

In addition to the above diseases, indoor roses can be affected by a variety of pests. The most common of these is the so-called spider mite on a room rose. The cause of its occurrence is most often insufficiently humidified and too warm air in the room. At the beginning of the defeat by this pest, pale dots can be seen on the leaves, which eventually increase and turn into solid whitish spots. In this case, wash the cobwebs from the plants with a tick shampoo for animals and increase the humidity in the room. After that, it is necessary to treat the roses with special preparations against ticks - acaricides.

There are other pests of indoor roses. These are rose aphids and thrips. They are especially dangerous in the spring and summer. Rosan aphid usually infects buds and leaves, after which they curl up and become covered with sticky secretions of this pest. When affected by thrips, you can notice spots and significant deformation of the flowers, as well as a change in the color of the leaves - they acquire a brownish-grayish hue with a silvery sheen. If these pests are found, the plants should be treated with insecticides.

It should be remembered that with proper and timely care for indoor roses, many diseases that affect these lovely plants, can be avoided. For their health, only two of the most important conditions are necessary - fresh cool air and bright diffused light.

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The most common rose diseases and treatments

INFECTIOUS BURN


Symptoms. Treatment
Reddish-black spots appear on the shoots, sometimes with a light brown dry area in the center of the burn. A crimson border is visible along the edge of the spot. These spots in the spring with poor ventilation quickly increase in size, ring the shoot, which dries up.


In order to avoid the spread of the disease, it is better to cut off the affected shoots. If the damage is small, and the shoot is very pitiful (for example, in a single-flowering rose), you can try to leave a branch, but watch it very carefully to prevent, for example, damage to the graft - after opening the roses and establishing warm weather, the spread of the disease quickly stops, and burn spots "freeze". Such branches can be pruned after flowering in summer. Such small spots can be tried and treated - cleaned with a sharp knife to healthy tissue and covered with Runnet.

POWDER DEW


Symptoms. Treatment.
The causative agent is the fungus Sphaerotheca pannosa. Reddish-purple spots appear on young leaves on young leaves, often the leaves are deformed. Buds, shoots, leaves are covered with powdery white bloom, the leaves curl and fall off. Varieties with coarser, leathery leaves sometimes exhibit mosaic coloring or wrinkling.


The most rapid development of the fungus and the germination of its spores (conidia) occur at 18-20C and humidity above 60%. Often during the growing season there are 2-3 outbreaks of the disease, which is associated with suitable conditions or re-growth of shoots (powdery mildew affects mainly young tissues). Compliance with the correct agricultural technology - do not overfeed roses, plant in well-ventilated places. Prevention is desirable - roses are regularly sprayed with infusion of mullein or ash (these infusions destroy the threads of the mycelium). For treatment, in addition to the mullein solution, it can be sprayed with triazole-based fungicides (Topaz, Skor).

RUST


Symptoms. Treatment
The causative agent is fungi of the genus Phragmidium. Rust fungi have several stages of development, the symptoms of damage in which differ from each other. In late April-early May, yellow-orange tubercles of the spring (ecidial) stage of the fungus appear on the stems at the opening buds, on young green shoots, petioles and the upper side of the leaves. Dusty pustules form on the underside of the leaves, from where the spores of the fungus are carried to healthy plants.


As a result, the leaves turn yellow and fall off, young shoots bend and dry out. In July, the uredostage develops, which is characterized by the appearance of small rusty-brown pustules on the underside of the leaves. Yellow and reddish spots on the upper side of the leaf, growing, cover its entire area. The shoots thicken, deform and crack, which is accompanied by a mass of dusting spores. At the end of August-September, the pustules darken - a tel-tostage develops in them, in the form of which the fungus overwinters in the affected stems and fruits. The last two stages can significantly reduce the growing season of roses, which leads to a decrease in growth, premature drying of leaves, weakening of plants, and in severe cases, to their death. The development of the disease is favored by high humidity, especially during the initial growing season. Hot, dry weather inhibits the development of the disease.


Rust is difficult to treat. It is necessary to cut and burn all the affected parts of the plant - in no case put them in the compost! For prevention, before each flowering, it is necessary to carry out foliar top dressing with a 0.3% solution of superphosphate extract and 0.3% solution of potassium nitrate until the leaves are completely wetted. For treatment, you can try alternate treatment with preparations containing mancozeb (Ridomil Gold, Profit) and penconazole (Topaz), as with black spot - but they are also more effective in early spring, as a preventive measure. With severe damage, plants are not subject to treatment. They are dug up and burned.

GRAY ROT


Symptoms. Treatment
The causative agent is the fungus Botrytis cinerea. Wintering shoots of bushes from the side of the upper cut rapidly turn brown from top to bottom and die. At high humidity, the shoots are covered with fluffy smoky gray mycelium. Areas of tissue become brown, and in wet weather become covered with a gray coating. Green shoots dry out completely, flower stems break. Sick buds do not bloom or give one-sided flowers. Densely double varieties are especially affected by gray rot.


The disease develops strongly with high humidity of air and soil, dense planting, lack of phosphorus and potassium in the soil. At the first signs of the disease, it is necessary to create conditions for maximum dryness near the plants, feed them with phosphorus-potassium fertilizers in a ratio of 2: 1 for the active substance, adding manganese microfertilizers.

BUDDING NOT OPENING


Symptoms. Treatment
The causative agent is the fungus Botrytis cinerea. Dark spots appear on the stems, the buds and flowers are covered with a dark gray bloom, the outer petals turn brown and dry, the flowers fall prematurely. First of all, rot attacks weakened plants, and most often with white and light pink flowers. Small brown spots (sores) appear on the petals, the leaves turn yellow and also fall off.
The disease progresses in rainy weather, especially among varieties with soft tender petals.


In order to avoid the appearance of rot on the flowers, roses are not watered by sprinkling, but during the rainy season they are fed with manganese-containing fertilizers, damaged flowers and buds are immediately removed, trying to prevent rotten petals from falling on the leaves. Unfortunately, a number of varieties are susceptible to such flower damage, and in rainy weather you will not be able to see them in all their glory. These are, for example, varieties Colette, Andre le Notre, Eden Rose, Sebastian Kneipp and others.

BACTERIAL CANCER

Symptoms. Treatment
The causative agent is the bacterium Agrobacterium tumefaciens (Sm. et Town.) Conn. On the roots, root collar, stem bases, uneven tuberculate growths of various sizes appear.


At first they are soft and light, gradually darken and harden, and eventually rot. On own-rooted roses, growths often appear directly on the stems and grow rapidly. In plants affected by bacterial cancer, a weak growth of shoots is noted, and the bushes gradually dry out. Plants with growths in the area of ​​​​the root collar are dug up and burned. Small growths can be removed with subsequent disinfection with a 1% solution of copper sulphate.

BLACK SPOT






Symptoms. Treatment
The causative agent is the fungus Marssonina rosae. In the second half of summer, black spots appear on the leaves, lower leaves quickly turn yellow and fall off. With a strong defeat, only young unblown leaves remain on the roses. Prevention is desirable against this disease - spraying with infusions of mullein, horsetail. You can also use drugs that increase the plant's resistance to diseases (zircon, immunophycyte, El, Amulet). Highly good recommendation gave on the Websada forum - for treatment, it is effective to alternate spraying with preparations containing mancozeb (Profit, Ridomil Gold) and triazole (Topaz, Skor), with an interval of a week (alternate no more than three times). Feedback on this treatment regimen is very positive.

DOWN POWDER (PERONOSPOROSIS)


Symptoms. Treatment
The causative agent is the fungus Pseudoperonospora sparsa. The bark of the shoots cracks, becomes covered with "sores". Small red-brown or purple spots of an angular shape (with straight sides of the spot) appear on young leaves, the leaf is gradually deformed. If the spot reaches the central vein of the leaf, it immediately falls off. Purple spots may also appear on shoots. On adult leaves, the leaf tissue becomes faded and soft in places, the color does not change, then this spot quickly becomes red-brown and dries, the leaves turn yellow and fall off, the flowers and buds are deformed. From the inside, a barely noticeable grayish coating sometimes appears (it can often be seen only with a magnifying glass). The outer petals of the buds turn black and fall off. Bushes lag behind in growth. contribute to the development of the disease high humidity air and cool weather, in dry and hot weather the disease subsides.
Downy mildew is fairly easy to confuse with black spot. The difference is that with downy mildew, the plant usually loses leaves from top to bottom (with black spot - vice versa). At the same time, the fall is very fast, literally in a couple of days.
Affected shoots must be cut and burned (the fungus overwinters in young shoots). The causative agent in biology is close to phytophthora fungi, therefore drugs against phytophthora (Profit, Ridomil Gold) are also effective against downy mildew. As a preventive measure, plants are fed with phosphorus and potash fertilizers.

Leaf cercosporosis (grayish spotting)


Symptoms. Treatment
The disease is caused by the fungus Cercospora rosiola Pass. Numerous rounded spots appear on the surface of the leaf, 1-5 mm in diameter, initially dirty brown, with a dark purple border. Later, the center of the spot turns gray, and the edging remains dark purple. Sporulation develops on the upper side of the necrotic tissue in the form of black dotted hemispherical pads. Leaves heavily affected by spotting turn yellow and fall off. The disease is easily confused with black spot, which is very similar. Treatment measures are the same as for black spot and downy mildew.

PHYLLOSTICTOISIS OF THE LEAVES


Symptoms. Treatment
The disease is caused by the fungus Phyllosticta rosae Desm. The spots on the leaves are rounded, scattered, dark brown with a wide purple-brown border. Over time, the center of the necrotic tissue becomes ash gray, but a wide purple border always remains. Another fungus, Phyllosticta rosarum Pass., is also often found, causing the formation of grayish-white spots with a wide crimson border.




In the center of necrotic spots, small dotted black fruiting bodies of the overwintering stage of fungi are formed. Affected leaves turn yellow and fall off prematurely. The infection persists in the fallen affected leaves. Treatment measures are the same as for black spot and downy mildew.

LEAF SPOT


Symptoms. Treatment
The causative agent is the fungus Coryneum confusum Bub.et Kab. brown spots, irregular shape, expanding, and covering the entire leaf, with or without a yellow or red border. Sporulation on the upper side of the leaves in the form of slightly submerged flat blackish rounded beds. The infection persists on the affected fallen leaves. Treatment measures are the same as for black spot and downy mildew.

Pestalotia roses
Symptoms. Treatment
The causative agent is the fungus Pestalotia rosae West. Brown spots appear on the leaves along the edges of the leaf blades, growing towards the middle. On the border of healthy and necrotic tissue, there is often a characteristic yellow stripe. Numerous grayish rounded sporulation pads develop from the upper sides of the spots. Affected leaves turn yellow prematurely and dry out. On young shoots, often in protected ground, depressed necrosis of a grayish-brown color appears, on which sporulation also develops in the form of grayish pads. The mycelium grows into the wood of the shoot, the necrosis deepens, becomes an ulcer. Shoots gradually dry up. The infection persists in plant debris and affected stems. Timely pruning of affected branches with ulcers, spraying plants along the bark before bud break with Bordeaux mixture or its substitutes (abiga peak). Collection and burning of affected leaves.

PURPLE SPOT


SymptomsTreatment
The causative agent is the fungus Sphaceloma rosarium (Pass.) Jenk. (=Phyllosticta rosarium Pass., Gloeosporium rosarium (Pass.) Grove.). On the upper side of the leaves, small multiple rounded purple, sometimes even black spots are formed, bordered by a wide crimson stripe. Later, the spots lighten in the center to grayish, but a narrow purple-brown border always remains. Small black fruiting bodies - pycnidia - form on the spots. On the underside of the leaf blade, the spots are brown, merging. Affected leaves fall off, flowers are underdeveloped. With a strong spread of the disease, dark brown spots with a white center appear on green shoots. Treatment measures are the same as for black spot.

Rose diseases have a negative effect on appearance plants. They are debilitating and, in severe cases, can be fatal. In order to avoid these troubles, each owner must be able to properly protect their garden roses. In the material of the article, we will talk in detail about what types of lesions are and how to treat roses from diseases. If the slightest signs of a pathological process are detected, treatment should be started immediately. Experienced gardeners know the best way to spray roses. by special means than to allow further spread of the disease. Since preventive measures can preserve the beauty of the plant and lengthen the flowering period.

Diseases and pests garden roses

Varieties of diseases of garden roses

Most diseases of roses appear due to inattention and non-compliance with elementary rules of care. Most pathological processes in plants are caused by fungi and bacteria. Thanks to modern drugs, they are easily treatable. Viral infections are rare. Things are much worse for him. Since it is impossible to cure the queen of flowers from this serious illness. All diseases garden shrubs can be divided into infectious and non-infectious.

Infectious diseases of roses

1. Powdery mildew.

Powdery mildew on roses

This disease is characterized by the appearance of a whitish coating on the surface of leaves and shoots. It usually appears at temperatures below 18ºC and high humidity. Powdery mildew in the initial stage is characterized by the appearance of small spots, which eventually grow and affect the entire flower, disrupting its metabolism. As a result, the young shoots begin to deform in the garden shrub and die off.

Prevention of rose disease is carried out with the help of nettle infusion or a decoction of horsetail, or a preparation

1. Rust.

Rust on roses

It develops due to infection of the ground part of the plant with the fungus Phragmidium. The disease of garden roses is manifested by the formation of yellow growths. Shoots begin to twist and crack.

As a preventive measure, it is necessary to prune and thin out dry branches throughout the entire period of active plant growth and spray with special immunomodulators, Bordeaux liquid 1%, Topaz, Falcon preparations.

1. Necrosis of the cortex.

Infectious burn or stem cancer of roses

This group of diseases is usually caused by fungi. In very rare cases, bacteria. It is characterized by damage to the cambium and cortex.

• A burn caused by infectious processes in a plant.

Roses that are in conditions of constant moisture are susceptible to the defeat of marsupial fungus. On the affected plant, the shoots become covered with brown, and then brown spots with a reddish edging. After that, shallow ulcers begin to form on the bark. Then brownish growths form in their place and the affected areas dry out.

• Ordinary cancer.
• Diplodia necrosis of the cortex.
• Tubercular death of the bark.
• Diaport cancer of the stem part of the plant.
• Drying of branches (cytosporosis).

Absolutely all varieties of roses are susceptible to these diseases. All affected areas of the plant must be cut and burned.

Preventive treatment is carried out using copper and iron sulfate.

1. Gray rot.

gray mold on roses

The disease is caused by the fungus Botrytis cinerea. The debut of the pathological process falls on winter period. Brownish impressions appear on the stems of the rose, from which a gray and fluffy mycelium then grows. Then, in its place, black growths with spores form. It is also possible the appearance of gray rot in summer time due to a large number precipitation. If roses are not treated for diseases, then the plant becomes covered with a completely gray coating and rots.

1. Damage to the root system caused by rot.

There are 2 diseases in which the root system is affected by rot: tracheomycosis and white sclerocial rot. The pathogen retains its viability in the soil for many years. The pathological process is characterized by root rot, which leads to a cessation of the supply of nutrients to the plant. First, the shoots suffer, and then the plant dies.

It is necessary to water the soil "Fitosporin-M", "Gamair".

1. Diseases caused by bacteria.

These include cancer of the roots and stem parts of garden shrubs. Root cancer is characterized by the formation of growths on the roots, as well as the root collar. At the beginning of the pathological process, they are soft, then harden and eventually rot. Cancer of the stem part of the plant appears as brown depressions without a border. On the affected areas of the plant, the bark dies off. After that, dark spots form on the queen of flowers.

1. Diseases caused by viral pathogens.

Viral diseases of roses - viral mosaic

Downy mildew on roses

Horticultural culture is affected by such viruses as: tobacco necrosis, streak, tobacco curl streak, tomato bronze, rezuhi mosaic, apple tree mosaic and many others. If we are talking about a viral infection, then this is a mixed infection, which consists of several types. Symptoms of the pathological process are very similar to each other. For a more accurate determination of the virus, a series of laboratory tests is necessary. Viral diseases of roses and their treatment begin with the removal and subsequent burning of the affected areas of garden shrubs. If the rose is very strongly affected by the virus, then it is completely burned. To prevent transmission of the disease, all garden pruning tools are treated with alcohol or a 1% solution of potassium permanganate.

1. Spotted lesion of the deciduous part of the plant.

• Ascochitous. It is characterized by the presence of yellowish spots on the leaves, as well as a brownish growth with fungal spores.
• Purple. The upper part of the leaf is affected. They show small dark or purple spots, bordered by a crimson stripe.
• Brown. On the upper part of the leaves are covered with dark spots, and on the lower part they are light without borders.
• Black (marsonina). It affects the leaves, in rare cases the shoots with a whitish coating, which eventually become black and sticky. The leaves of the garden shrub become dark in color, and then crumble.
• Cercosporosis (gray). In its manifestations, it is similar to black spot. Dark spots no larger than 5 mm appear on the leaves.
• Ramularia of the leaves of the plant. When the disease is affected, the leaves become brown in color, dry out and crumble.
• Pestalotia. In the central part of the leaves of roses, the disease manifests itself as dark brown spots. The yellow stripe clearly distinguishes between the diseased and healthy part of the plant. It is characterized by premature leaf fall.
• Downy mildew. The causative agent of the disease is a fungus. It appears purple and grayish bloom. The most famous and widespread disease.
• Septoria (septoria spotting).
• Phyllostictosis (phyllostic spotting).

Non-infectious diseases of garden roses

• The process of aging.
• Chlorosis. Appears with insufficient amounts of nutrients in the soil. The leaves of the plant turn pale, yellowish veins appear on them. Chlorosis can appear due to increased acidity of the soil, excess, as well as lack of moisture.
• Burn caused by exposure to ultraviolet radiation.
• Lack of nutrients in the soil (potassium, magnesium, iron, phosphorus, nitrogen).
• The toxic effect of fertilizers. Occurs with an increase in the amount of treatment with chemical solutions. When treating a plant with pesticides, it is necessary to take into account the humidity and air temperature.

Rules for spring processing of plants

Diseases of roses after winter begin to activate, causing damage to plants. Therefore, it is very important not to miss this period and carry out preventive treatment of roses. It is during this period that the plant enters the active phase of growth.

First you need to remove the winter shelter. Then do a thorough inspection. rose bushes for diseases and pests. Now there is a huge number of preparations for the treatment of garden roses from the defeat of pathological pathogens. Among a large assortment it is very difficult to choose how to spray roses in the spring from diseases.

Copper sulfate is a proven chemical that has been used for many years to prevent as well as treat rose diseases in the spring. For this purpose, a 1% or 3% aqueous solution of copper sulphate is made. They carry out spraying of the plant and the soil that is next to it.

New varieties of garden roses

Breeders from all over the world are constantly trying to develop new varieties of plants that will be less whimsical to the conditions and habitat. Disease resistant roses mark these with the ADR sign. Of course, he cannot guarantee in any way that everything will be fine with this particular variety of garden shrub. But the quality mark is awarded only to those varieties that have the best characteristics.

Most of the garden shrubs marked with this quality mark are quite rare, and some are well known in many countries of the world. Among them you can find: densely double, non-double, ground cover and flower beds.

To the most resistant varieties include the following types of garden roses:

• non-terry "Escimo",
• kidney cover "Crimson Meidiland",
• floribundas "Cherry Girl", "Novalis",
• climbing "Apricola" and many others

Subject to simple rules care and proper feeding of the plant can avoid the appearance of diseases of garden roses. If you see the first signs of illness, take action immediately. This approach will not only quickly heal your flower, but also protect the entire garden from infection by pathogens. Now there are many varieties of garden roses that are disease resistant. But this does not mean that the flowers will not need care.

What usually prevents you from growing healthy flowers? Certainly, various diseases and pests. Rose is one of the most sought after plants among flower growers. Having a "queen of flowers" in your flower bed is considered a symbol of admiration. Diseases and pests in roses can destroy the plant.

Known diseases of roses

Treatment of roses is an important stage in the cultivation of a flower. But in order to improve it, knowledge of the varieties of diseases, their symptoms, causes of occurrence and spread, methods of struggle is required.

The most famous diseases of roses:

• gray rot;
• powdery mildew;
• rust;
• spotting.

Carry out protection of roses, it is worth in between flowering. The disinfection process is best done regularly. After all, one disease makes a flower vulnerable to other diseases. Infections quickly spread throughout the plant and cause it to weaken, eventually it will die. For inexperienced gardeners, it is better to look at the most common diseases in roses in pictures. So already a person will have an idea about plant diseases.

How to prevent rose disease?

All diseases of roses must be prevented, for this it is worth carrying out preventive procedures. From improvised means, you can make decoctions of garlic, onions or tobacco, which are sprayed with rose bushes. It's ecological safe method, not addictive in pathogens.

Chemical treatment is best done in the morning, but not very early, after the dew has disappeared on the leaves. You can also in the evening so that the plant is not already wet. Before you process a flower, you need to water it abundantly under the root.

Rose diseases and their treatment cause a lot of trouble for gardeners. Many use the tricks of nature.

For example, marigolds or lavender, calendula or nasturtium can be planted next to rose bushes. These plants have an aroma that can repel ticks and aphids. Growing garlic nearby helps prevent fungal diseases.

Preventive measures

The causative agents of diseases are very persistent, they can live perfectly for a long time on already dead leaves and shoots. Therefore, if the rose was sick, then its remains, nearby weeds and fallen greens should definitely be collected and burned.

Also, before preparing for, you need to remove all the leaves from the bush. If this is not done, then in early spring the rose will be actively affected by fungal diseases.

For prevention in late autumn, it is recommended to treat the flower with 3% iron sulphate. At the very beginning of spring - spray the bushes with a solution of copper chloride. Also, do not start working with a pruner or other cutting tool without first treating it with a disinfectant.

It is very important to know how to deal with diseases in roses. Without certain information, the plant will not grow in its favorite area, because each disease brings a lot of harm to the flower.

Rust treatment for roses

Rose rust is easy to spot. Signs of the disease:

• red spots;
• dispute formation.

When and why does rust appear? Basically, this is the period of the onset of the first heat. Due to the fact that the plant is very weakened and easily affected by the disease.

What to do:

• spraying medicinal decoction horsetail;
• watering with infusions of wormwood;
• removal of affected leaves initial stage.

Wormwood tincture is prepared in advance so that it is always at hand. For 10 liters of water, you will need half a kilogram of fresh wormwood leaves and 50 grams of dry ones. The infusion should stand for fourteen days. They can be sprayed, as well as watered under the root.

If conventional decoctions do not help, then treatment with a 1% solution of Bordeaux is required.

Powdery mildew treatment for roses

Powdery mildew most often affects roses indoor or grown in greenhouse conditions. The disease is not difficult to determine, it appears as a white powder on the flower. After maturation, the spores begin to stand out drops, like dew.

At the initial stage of the disease, white spots are easy to erase, but after a couple of weeks the entire bush will be dotted with a “white sore”. As a result, the leaves and flowers spin and fall off, the stem of the plant is deformed, and young shoots die. This is the certain death of the rose.

Powdery mildew is difficult to fight, so preventive measures are required: spray the bush with three percent copper sulphate. It is also important to prevent a sharp temperature drop, which contributes to the spread of the disease.

On the early stages development of powdery mildew, you can treat the plant with an infusion of wood ash and manure. Spray every week.

When the disease is at the stage of moderate severity, it is worth treating the bush once every ten days with a soap-copper solution.

If powdery mildew has already affected most of the rose, then special chemicals will come to the rescue. For example, benomyl or topsin.

Treatment of roses from black spot

For ground roses, black spot is a great danger. The disease appears if the plant receives less nutrients. Also, waterlogging of the soil contributes to the spread of the disease.

The favorite time for black spotting is the beginning of summer or the end of spring. But already visible signs on the plant will appear only at the end of summer or at the beginning of autumn.

Symptoms of black spot:

• greens are covered with dark spots;
• a yellow "edging" is formed at the ends of the leaves;
• cessation of flower growth.

At the initial stage of the disease, the affected areas of the plant are removed, the bush is sprayed with a decoction of horsetail. If these methods do not help, then the rose is treated with sulfur and copper-containing products. You can also water under the root with a solution of Bordeaux liquid once a week.

If the above methods of struggle do not help, then it is worth removing the entire bush and burning it. So that black spot does not spread to healthy plants.

Photos of rose diseases can be viewed in the catalogs of specialized stores, and they are also easy to find on the Internet.

Video: how to avoid rose disease