Diseases of roses adversely affect the appearance of the plant. They deplete, and in severe cases can lead to death. In order to avoid these troubles, each owner must be able to properly protect their garden roses. In the article we will describe in detail what types of lesions are and how to treat roses from diseases. When identifying the slightest signs of a pathological process, it is necessary to immediately begin treatment. Experienced gardeners know that it is better to spray roses with special means than to allow further spread of the disease. Because preventive measures can save the beauty of the plant and lengthen the flowering period.
Causes of disease in garden roses
Roses are one of the most beloved and popular plants in the garden. However, a major drawback is susceptibility to various diseases and pests. Now breeders are engaged in the breeding of new varieties of roses, which will have not only beautiful appearance, but also be resistant to pathogenic bacteria, fungi and pests.
Science knows a lot of reasons that can lead to diseases of the queen of flowers. Next, we will focus on the most basic mistakes in the care of a plant at amateur gardeners:
- Non-observance of generally accepted rules for pruning in spring and in preparing garden bushes for a long wintering period. Unfortunately, not everyone knows how to properly handle the cut on the shoot. This error is not catastrophic, but is fraught with long-term healing of the crop, as well as weakening of the plant. During this period, the rose becomes more susceptible to disease.
- Wrong watering. It is categorically not possible to water in the evening, because the excess water does not have the ability to evaporate. Insufficient watering leads to wilting of the plant.
- Climatic conditions are not suitable for a particular plant variety. Coolness and excess moisture provokes the appearance of diseases.
- Absence or incorrect feeding. Depletion and wilting of the plant due to insufficient nutrients can trigger the onset of the disease.
Varieties of garden roses diseases
Most of the diseases of roses appear due to negligence and failure to follow basic rules of care. Most of the pathological processes in plants are caused by fungi and bacteria. Thanks to modern drugs, they are easily treatable. Rarely viral diseases. With him things are much worse. Since it is impossible to cure the queen of flowers from this serious illness. All diseases of shrubs can be divided into infectious and non-infectious.
Infectious Rose Disease
- Mealy dew.
This disease is characterized by the appearance of a whitish plaque on the surface of leaves and shoots. It usually appears at a temperature of less than 18 ° C and high humidity. For powdery mildew in the initial stage, small spots appear, which eventually grow and infect the whole flower, disrupting its metabolism. As a result, young shoots start to deform in a garden shrub and die off.
Prevention of rose disease is carried out with the help of nettle infusion or decoction of horsetail or phytosporin preparation.
It develops due to infection of the ground part of the plant by the fungus Phragmidium. The disease of garden roses is manifested by the formation of yellow-colored growths. Shoots begin to wriggle out and crack.
As a preventive measure, it is necessary to prune and thin out dry branches during the entire period of active plant growth and spray it with special immunomodulators, Bordeaux liquid 1%, with Topaz and Falcon preparations.
This group of diseases is usually caused by fungi. In very rare cases - bacteria. It is characterized by the defeat of the cambium and bark.
- Burn caused by infectious processes in the plant.
Roses that are in conditions of constant moisture are susceptible to marsupial fungus. On the affected plant shoots are covered with brown, and then brown spots with a reddish edging. After that, shallow ulcers begin to form on the cortex. Then brownish growths form in their place and the affected areas dry out.
- Common Cancer.
- Diplodio necrosis of the cortex.
- Tubercular death of the cortex.
- Diaportovy cancer stem of the plant.
- Shrinking branches (cytosporosis).
Absolutely all varieties of roses are subject to these diseases. All affected areas of the plant must be cut and burned.
Prophylactic treatment is carried out with the help of copper and iron sulphate.
The disease is caused by the fungus Botrytis cinerea. The debut of the pathological process falls in the winter period. Brownish depressions appear on the stems of the rose, from which the gray and fluffy mycelium then grows. Then in its place black growths with spores are formed. It is also possible the appearance of gray rot in the summer due to the large amount of precipitation. If the treatment of roses from diseases is not performed, the plant is completely covered with gray bloom and rot.
- Root system damage 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 vitality in the soil for many years. The pathological process is characterized by rotting of the roots, which leads to the termination of the flow of nutrients to the plant. First, the shoots suffer, and then the plant dies.
Watering the soil is necessary "Fitosporin-M", "Gamar".
- Diseases caused by bacteria.
These include cancer of the roots and stem of the garden shrubs. For cancer of the roots is characterized by the formation of growths on the roots, as well as the root neck. At the beginning of the pathological process, they are soft, then harden and eventually rot. Cancer of the stem part of the plant appears brown hollows without filming. On the affected areas of the plant the bark dies. Then dark spots are formed on the queen of flowers.
- Diseases caused by viral pathogens.
Garden culture is affected by such viruses as: necrosis of tobacco, striation, curvy stripes of tobacco, tomato bronze, reza mosaic, apple mosaic and many others. If we are talking about a viral lesion, then it 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, it is necessary to conduct a series of laboratory tests. Viral diseases of roses and their treatment begin with the removal and subsequent burning of the affected areas of shrubs. If the rose is very badly infected with a virus, then it is completely burned. To prevent the transmission of the disease, the entire gardening tool for pruning is treated with alcohol or 1% potassium permanganate solution.
- Spotted lesion of the leafy part of the plant.
- Ascohyte. It is characterized by the presence of yellowish spots on the leaves, as well as a brownish build-up with spores of fungi.
- Purple. The top part of a leaf is affected. They show small dark or purple spots bordered with scarlet
- Brown On the top of the leaves are covered with dark spots, and on the bottom are light without a rim.
- Black (Marsonina). It affects the leaves, in rare cases, shoots whitish bloom, which eventually become black and sticky. The leaves of the garden shrubs become dark in color, and then fall off.
- Cercosporosis (gray). In its manifestations similar to black spot. Leaves appear dark spots no larger than 5 mm
- Ramulariasis of the leaves of a plant. When a disease is affected, the leaves become brown in color, dry out and fall off.
- Pestalocia. In the central part of the leaves of roses, the disease manifests itself as dark brown spots. The yellow stripe clearly distinguishes 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 manifests itself in purple and greyish bloom. The most famous and common disease.
- Septoriosis (septoriosis blotch).
- Phyllostiktosis (phyllostikose spottiness).
Non-communicable diseases of garden roses
- The process of aging.
- Chlorosis. Appears with an insufficient amount of nutrients in the soil. The leaves of the plant turn pale, yellowish streaks appear on them. Chlorosis may occur due to the 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).
- Toxic effects of fertilizers. It occurs with an increase in the amount of treatment with chemical solutions. When treating plants with pesticides, it is necessary to take into account the humidity and air temperature.
Rules of spring processing 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 conduct a thorough inspection of pink shrubs for the presence of diseases and pests. Now there is a huge amount of drugs for the treatment of garden roses from the defeat of pathological pathogens. Among the large assortment it is very difficult to choose how to spray roses from diseases in the spring.
Copper sulfate is a proven chemical that has been used for many years for the prevention and treatment of rose diseases in the spring. For this purpose, make 1% or 3% aqueous solution of copper sulphate. They carry out spraying of plants and soil, which is located next to him.
New varieties of garden roses
Breeders from around the world are constantly trying to bring new varieties of plants that will be less whimsical to the conditions and habitat. Disease resistant rosesLabel these sign ADR. Of course, he cannot guarantee that it will be all right with this sort of garden shrub. But the quality mark is awarded only to those varieties that have the best characteristics.
Most garden shrubs labeled with this quality mark are quite rare, and some are well known in many countries around the world. Among them you can find: thick-termed, non-terry, ground cover and flower beds.
The most resistant varieties include such types of garden roses:
- non-curvy "Escimo",
- Crimson Meidiland
- floribunda "Cherry Girl", "Novalis",
- climbing "Apricola" and many others
With the observance of simple rules of care and proper feeding of the plant, you 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 with pathogens. Now there are many varieties of garden roses, which are resistant to diseases. But this does not mean that the flowers will not need care.
Types of diseases
Unfortunately, rose diseases are dangerous and can spread to other types of plants in your garden. Therefore, it is very important to notice in advance the signs of the disease and eliminate them. The following types of rose diseases are distinguished:
- powdery mildew,
- rose rust,
- black spot (leaf disease),
- infectious burn or cancer of the rose,
- downy mildew,
- gray rot
- rose virus disease - mosaic,
Prevention and treatment
Mealy dew. Occurs in a situation with unstable weather conditions. It can be avoided without resorting to medication and prophylactic measures, only with the support of a temperature regime of 16–18 degrees and humidity not higher than 60%. Otherwise, the likelihood of damage to flowers spores of the fungus.
Disputes with water, insects and even through the air spread, leafy plates and stems, sometimes flowers are affected. A white or light gray powdery raid appears on the bush, loose pustules appear, in which fungal spores mature. How to deal with them? All affected parts should be immediately removed and treated with ash infusion. If the disease progresses, then you need to process soda ash. The most effective will be the use of drugs "Baktofit" and "Fitosporin."
To prevent the disease, in a timely manner thin the bushes, do not abuse the nitrogenous top dressing, regularly sprinkle the mullein extract and feed with potassium sulfate. It is advisable to handle buds fungicides.
Infectious burn or cancer of the rose. Infection of a flower with a particularly dangerous fungus occurs in the spring and autumn period. Dark purple or brown ulcers appear on the stems. The shoots dry out, and black spots appear on the spot of ulcers with fungal spores, which provoke further infection. How to treat? Small wounds can be carefully cleaned to a healthy basis and cover with garden pitch.
Sick stalks must be removed without damaging the ulcers. Infected shoots are treated with Bordeaux liquid and fungicides. Preventive methods: protect the roses from the cold, before wintering, treat the soil with copper sulphate or Bordeaux mixture, fertilize with potash fertilizer in the summer. Before seasonal pruning, be sure to treat the instrument with antibacterial agents.
Rust on roses. In the spring, brownish-red spots appear on the leaves, provoked by the penetration of the fungus. The leaves wither and fall off, and the stems unscrew and crack, infecting neighboring plants.
Treatment of roses: remove and burn infected stems; use rose and copper preparations and a solution of bordeaux mixture to treat roses. To prevent the appearance of rust, make sure that the roses are not steamed, remove dry leaves and branches, process the seedlings with a solution of copper sulphate. Special chemical immunomodulators can also cope effectively.
Black spot. From the second half of summer black-brown spots can appear on the leaves of roses, which quickly grow. Gradually, the plant loses leaves and dies. It is better to immediately burn the affected bushes, as the spores of the fungus can even hibernate on them. For treatment, zinc and copper containing fungicides are used. Every autumn and spring, you need to carefully dig up the soil and spray plants with vitriol before wintering.
Downy mildew. When the leaves appear dirty-red or purple spots, and the shoots change shape and crack, then your flowers are infected. Bottom sheet wraps barely noticeable white web. The emergence of the disease contributes to low temperature, a high percentage of humidity, lack of sun and poor ventilation of the area.
From diseased bushes should immediately get rid of, it is best to burn. If the damage to the plant is small, then fungicides and copper-zinc preparations will help you to cope with the disease. To prevent disease, you need to monitor the purity of the soil and regularly fertilize it with means containing potassium and phosphorus.
Gray rot. The buds and tops of young stems are mainly affected by this disease. The appearance of yellow and dark spots precedes the gray fluffy bloom on the ground affected by the fungus. In the fight against the disease you will again help chemicals to fight fungi. To prevent infection and the development of infection, avoid late heavy irrigation of the bushes, use drugs to stimulate growth and a solution of potassium permanganate. It is also undesirable to plant plants near the roses that are susceptible to this disease, such as strawberries.
Virus mosaic. Viral infection of the hive caused by the use of an infected tool during processing. Small bright spots cover the leaves of the stem from the bottom up. Infected flowers must be removed immediately, otherwise the virus will quickly spread to neighboring plants. To avoid contamination, first of all, treat the tools for cutting and grafting with disinfectants, you can use a weak solution of iodine.
Cytosporosis. Roses are sick and so-called infectious desiccation. The fungus can provoke not only the drying of individual branches, but also the bush as a whole. Orange or red tubercles with fungal spores appear on the bark of the shoot. It is necessary to remove such shoots carefully, without damaging the tubercles. Prevention of roses and the treatment of their disease is carried out using Bordeaux liquid treatment.
Indoor roses are also susceptible to fungal diseases, but proper care will help prevent the illness of your pets.
Infectious diseases of roses
Among infectious lesions one of the most common is powdery mildew, affecting the leaves and shoots. The main reason for its appearance is a high level of humidity and stably cool air temperature (from 18 ° C and below).
At first, small specks appear, but gradually they become larger and cover the entire shrub with a lesion. There is a metabolic disorder, resulting in deformation of the shoots, and the young branches begin to die.
В целях профилактики мучнистой росы розу следует обрабатывать с помощью крапивного настоя или эффективного средства Фитоспорин.
Не менее серьезной проблемой является так называемая ржавчина. Как и мучнистая роса, она вызывается грибком и поражает всю надземную часть кустарника. It is characterized by the appearance of yellow growths, due to which the branches twist and crack. The best prophylactic in this case is correct pruning and timely elimination of dried branches and flowers all the time while the rose is in the active flowering stage. It is also recommended to use spray products to stimulate the immunity of the flower: Topaz, Falcon or Bordeaux mixture.
Necrosis of the cortex is a wide range of fungal lesions. There are species called marsupials that infect the shrub with brown, and later - brown formations that have a red border. Next, the bark is covered with ulcers, in place of which growths appear, and the infected parts of the rose gradually begin to die off. There are:
- ordinary cancer,
- diploid necrotic lesion,
- stem diaportovy cancer.
Exposure to necrotic lesions is present in all roses, without exception, with varying degrees of resistance to them. If this happens, all the diseased parts should be immediately removed and must be burned. For the purposes of prophylactic treatment, iron and copper sulphate are used in the form of special solutions.
Gray rot is also a known fungal infection. It begins to develop in winter, with the appearance of brown formations on the branches that go deep into the bark, after which a rich gray mycelium begins to “bloom” on the affected areas. If the rose is not treated in time, the lesions become black and turn into sporadic growths. In the summer, gray rot may also appear - in case of heavy precipitation.
In addition to gray rot, there are several similar diseases that affect only the roots of the rose. This is tracheomycosis and white sclerociasis. The roots rot, then the process spreads to the shoots, and the shrub may die. As a prophylaxis of putrefactive infections, the most effective are such means as Gamair and Fitosporin-M, which is popularly called medicine for roses for all diseases.
Fungal diseases of roses and the fight against them is a question that is always relevant, even if the plant looks healthy, as the processes can flow for a while hidden and unnoticed.
As already noted, diseases of a bacterial nature are less likely to affect roses. Among them, the root system cancers are especially distinguished (both on the roots themselves and on their necks). The main symptom: the roots soften and rot, and the stalks of the shrub are covered with brown dents, which are replaced by black spots. It is usually very difficult to treat such a pathology, and if the affected areas are not removed in time and burned, the rest of the shrub dies.
Viral diseases of roses, as well as cancer, are difficult to treat. Among the most common diseases, tobacco necrosis, striation (regular and curly), a tomato bronze virus, a mosaic of rezuha and an apple tree are most common. As a rule, a flower is affected by several types of virus at once, and laboratory tests will be needed to accurately identify the causative agent.
At the beginning of treatment, all affected areas should be removed and burned. After trimming, all tools must be treated with an alcohol solution or potassium permanganate. Viral diseases of roses are very difficult, and their treatment does not always bring a positive result.
In addition to these diseases, there is also a whole range of fungal pathologies, called "spots", which are classified according to color (yellow ascochytosis, purple and brown spots, Marsonin or black, gray or cerkozporoz). For the treatment and prevention of plant ailments at home, there is a whole range of phytosporin antifungal agents.
Pests of roses and the fight against them
Pests of garden roses also cause various diseases, and the fight against them in intensity is in no way inferior to the treatment of infectious diseases. The activity of such insects affects the roses is no less detrimental, so for gardeners it is important to know their description and possible treatment.
The spider mite is especially dangerous during a dry and hot summer, and its activity begins to flourish at high temperatures (29–31 ° C). These insects deprive the leaves of the cell sap, for which reason they become covered with light spots, turn yellow and fly around.
How to deal with such pests - only chemicals will become faithful helpers: for example, Fufanon, Spark-2 or Tiovit Jet. Due to their effects, insects cease to reproduce.
Pest control on roses is carried out by spraying - in the morning or in the evening, and, if necessary, to protect the bush from other insects, the preparations are mixed with all fungicides commercially available. The exception is the Bordeaux mixture, which in this situation can not be applied.
Aphid (green or brown) is an equally well-known pest that usually activates in June. She likes to settle on young bushes and leaves. Characteristic signs of the defeat of aphids is a curvature of the branches and unopened buds. The plant should be sprayed as soon as the first small larvae appear, and after 10 days the procedure is recommended to be repeated. How to treat roses from such pests in the summer - the preparations Confidor, Commander, Spark and other analogues are suitable.
In the case of aphids, you should always remember how to spray roses: you should not miss the appearance of larvae, and when the procedure is repeated, it is recommended to alternate the known means - in order to maximize the impact.
The leaf beetle or weevil can be “identified” along the gnawed edges of the leaves. This bug is active at night, so it’s impossible to see it in the daytime. Beetle larvae harm the roots, and adults eat the leaf. In such a situation, pest control should be carried out during sunset by the use of insecticides.
There are also insects that cause great damage to flower buds: thrips. On the flowers appear small red spots, they become sloppy. Subsequently, the lesion captures and leaves, which become yellowish, speckled, with a silvery shade. The means used are those that destroy aphids.
How to spray roses from pests, plant preparations
In addition to those drugs that have already been named, the treatment of roses is carried out by several more effective substances, including those that can be called “emergency medicine” for shrubs affected by insects.
A substance of a wide range of applications. Akarin is a systemic drug that all rose pests are afraid of. It destroys all mites, larvae and adult aphids and thrips. Ecologically safe solution self-destructs when released into the ground, and if the question arises about how to treat roses from pests in the summer - Akarin is one of the best options, since its effectiveness is preserved in hot weather, and pests of roses are destroyed as soon as possible.
The working solution of Akarin is prepared simply: the contents of the ampoule dissolve in 1.5 liters of water, mix and bring to the recommended volume. Then, the resulting liquid should be thoroughly mixed again and process the rose in clear weather. Spraying is carried out in the morning or in the evening, with an interval of three to five days, depending on the manifestation of the effect.
The Russian drug Agravertin belongs to the latest generation of substances with a high level of effect and environmental friendliness. If there are pests on the rose, one ampule is also dissolved in 1.5 liters of water, and the treatment is carried out in the evening, by spraying. The interval between applications is from three to four days, and the number of procedures can vary from two to three.
Agravertine perfectly destroys all known harmful insects, exerting an instant nerve-paralytic effect on them.
Preparations of the Spark series are an effective "first aid" for roses. For example, the Spark Double Effect can cure plants of at least sixty species of insects. To enhance the effect of the drug in it does not hurt to add a second active insecticide.
For protection in hot climates, there is another option from this series - Spark Golden, which is kept in the structure of the plant for almost a month, having a prolonged effect on all known garden pests. Substances produced under the brand "Iskra" are safe for animals and humans, the form of their release - powders and ampoules, and all the subtleties of use are described in detail in the instructions for use.
If you properly care for garden roses, the likelihood of illness will be much less, but if the shrub is still sick, you can always use reliable means to cure it. It is important to carefully examine the plants once or twice a week in order not to miss the onset of the disease: in the initial stages, the effect of the procedures comes much faster and is the most reliable.
Rose diseases and their treatment:
Why are roses sick?
Before starting treatment, the causes of the disease should be determined. Often ailments occur due to carelessness gardener. The most common reason is the planting of an already infected flower. To prevent this from happening, buy seedlings only in specialized rose gardens, where high-quality disease prevention is carried out and there is a guarantee that the plant will be healthy.
Rose diseases can also occur through infection from other flowers, so before planting a new plant in a flower bed, check it for the presence of parasites. If you find a diseased plant, you should immediately isolate it, while capturing a little of the soil in which the plant grew, since bacteria and microbes can remain in the ground.
Often the cause of various diseases is improper care. Without the need to feed the leaves of the rose will begin to turn yellow. Problems with the growth of roses can be explained by the lack or excess of moisture, or the proximity to a plant that has a strong root system.
What are rose diseases and their treatment?
The list of the most common diseases include the following:
- gray rot
- powdery mildew,
Please note that all these diseases spread very quickly throughout the rosary, so it is very important to notice them in time and begin treatment. To have a general idea ofwhat the manifestation of a disease looks like, you should look at them in pictures.
Rust: main manifestations and treatment options
The signs of this disease are as follows:
- the presence of red color on the leaves of the plant,
- spore formation.
Often, rust appears after winter, as the flower is very weak and cannot fight infection.
The treatment options are as follows:
- spraying the plant with a decoction of horsetail,
- removal of affected leaves,
- watering roses tincture of wormwood.
Please note that the tincture of wormwood should be prepared in advance so that it is well infused. So, for 10 liters of water, take a pound of fresh wormwood leaves and 50 grams of dry wormwood leaves. Infuse solution for watering should be about two weeks. This tincture can not only be watered, but also spray the plant.
For the treatment of advanced stages should use a solution Bordeaux tools, since the usual tinctures do not help.
Features of powdery mildew treatment
Often this disease affects greenhouse and indoor roses.. Determine powdery mildew very easy. Its main manifestation is white scurf. After fungal spores ripen on them, drops appear, very similar to dew.
At the initial stage of the disease white spots are insignificant, but then they stick around the whole bush. As a result of this disease - deformed stem, lack of petals and young shoots. If time does not begin treatment, the rose will die.
It is difficult to fight with powdery mildew, therefore it is easier to prevent its development. In order to prevent should be spraying the bushes 3% copper sulphate. Pay attention to the fact that the spread of powdery mildew contribute to rapid temperature changes.
If the disease is at an early stage of development, then the bush can be treated with infusion of manure and wood ash. Spraying is done every week..
To combat the powdery mildew in the middle stage of development, a soap-copper solution is used. Spraying is carried out every ten days.
To fight a strong infection can only be with the help of chemicals, as all the others are no longer effective. Among the chemical agents can be identified such as: Topsin and Benomil.
Features of the fight against black spot
Ground roses can suffer from black spot. This disease occurs due to the fact that the plant does not receive the necessary nutrition, or the soil is very wet.
Often, black spot appears at the beginning of summer, but visible signs become visible only by the beginning of autumn.
The following nuances indicate the infection:
- the plant stops growing
- a white border is formed on the sheets,
- leaves are covered with dark spots.
In the initial stages, experienced gardeners recommend spraying the bushes with a decoction of horsetail. If this method of processing does not help, then you can use special preparations that contain copper and sulfur in their composition. Rose roots can also be processed Bordeaux acid, the procedure should be carried out once a week. If none of the above methods helps, destroy the infected shrub. This is necessary so that the disease is not transmitted to other rose bushes.
Infectious burns: signs and treatment
This disease, caused by the presence of the fungus, often appears in the autumn-spring period, that is, when the plant is at rest.
Pay attention to what is infectious burn affects all kinds of roses and can even spill over raspberries or blackberries. Reproduction pathogenic fungus contributes to high humidity. and also untimely top dressing of a plant.
The main sign of an infectious burn is the presence of dark brown ulcers on the stem of the plant.
How to treat the disease?
The treatment process consists of the following steps:
- remove infected shoots, but without damaging the ulcers on the stem of the plant,
- clean the ulcers to the base, for this you can use a stationery knife,
- treat ulcers with garden warp,
- if the buds have not yet dissolved, a bush can be sprayed with a 3% solution of Bordeaux liquid, this is necessary in order to get rid of the spores,
- infected shoots should be sprayed with the Chom fungicide.
Sections of roses affected by gray mold are covered with dark spots. In time, a gray gray mycelium appears on the stems. The fungus develops well with high humidity, as well as with poor ventilation, if we are talking about greenhouse roses.
The gray rot plant treatment algorithm is as follows:
- treat rose bushes with fungicides for several weeks,
- periodically you should feed the plant with different drugs to improve growth,
- affected areas should be cut and burned.
Virus mosaic: description and treatment options for this disease
Virus mosaic causes viruswhich can be transmitted through infected cutting tools or during grafting. The first signs of infection are the appearance of yellow spots on the lower leaves of the plant.
In order to prevent the development of this disease, you should constantly inspect the plants, as well as disinfect cutting tools. For disinfection, you can use a 1% iodine solution.
It is very important to know what diseases of roses exist and how to deal with them, but it is equally important to have information about preventive measures. For prevention can be used as improvised means, and special preparations.
At home, you can prepare for the prevention of decoctions of onion, tobacco or garlic. This is the easiest and safest method that is not addictive for pathogens.
If we talk about chemical processing, then it is best done in the morning, as soon as the dew leaves the leaves. Before processing, be sure to water the rose well, its root must absorb the right amount of moisture.
Note that experienced gardeners recommend treating the flowers with a 3% solution of ferrous sulfate. Processing should be carried out in late autumn. Spring preventive measures consist in spraying the plant with a solution of chlorine-oxide-copper.
As a result, it should be noted that there are a number of diseases of roses, each of which has its own specifics and its own methods of treatment. However, the best way to protect your rose garden is through disease prevention. Try as often as possible to inspect rose bushes for the presence of insects and other signs of disease.
To protect these beautiful flowers from diseases, it is important to carry out a number of preventive measures:
- Pruning and destruction of weak and diseased shoots, dried foliage and other plant debris on which disease-causing fungi and bacteria can spend the winter.
- Для предупреждения заболеваний кусты роз опрыскивают химическими и биологическими препаратами широкого спектра действия: Алирин-Б, Скор, Топаз и др.
- Необходимы периодические осмотры розовых кустов, чтобы не пропустить начало болезни и её распространение на соседние растения. Запущенное заболевание трудно лечится и может привести к гибели розы.
- Do not overfeed the plants with nitrogen fertilizers, and in the second half of the summer, eliminate nitrogen from fertilizing completely.
- Periodic feeding with potash and phosphate fertilizers increase plant resistance to diseases.
Diseases of roses are divided into fungal, bacterial and viral. This article provides descriptions, photos and methods of treatment for the following diseases:
Description of the disease with photos and video
Rust is a disease of early spring
It was in those years when spring is warm and rainy, roses most often suffer from rust. The problem manifests itself even in the period when the plants bloom. Spores arise as a dusty orange mass. It can be observed near the leaves, also in the area of the root collar.
In summer, the disease can be seen on the back of the leaves. There appear peculiar pads of red color. The appearance of these sporulation negatively affects the whole plant. Its functions and abilities are disturbed: photosynthesis, metabolism. When the disease develops, the plant loses its decorative appearance. Leaves, flowers and buds begin to be oppressed, deformed.
How to prevent
It is important to follow the three main rules. Firstly, it is necessary to thin the bushes, removing dried branches, flowers, every year during the end of the summer. Secondly, with the onset of autumn, it is important to treat the plants with Bordeaux mixture or copper sulphate (3%). And, thirdly, roses should be sprayed according to the instructions of chemicals that stimulate the immune system of plants. Suitable, for example, "Zircon", "Immunocytofit", etc.
The fight against this disease includes the following measures:
- Affected shoots must be trimmed
- The leaves are collected and must be burned,
- They dig up the soil,
- Treatment with copper-soap solution during the growing season.
Rust can try to eliminate this tool. Mixed 1 tbsp. l soda, 1 tsp. funds that wash the dishes, 1 tbsp. l vegetable oils, as well as 1 gallon of water and 1 tablet of aspirin dissolved in water. A mixture of these ingredients plants should be sprayed once in about 1-2 weeks.
Rust - the most terrible disease of roses: video
Black Spot - Summer Rain Disease
Most of this problem is spreading in those regions where frequent precipitations are observed in the second half of summer. At first only small dark spots appear. Until the end of July, they may already become large, sporulation on them. Next, the leaves begin to fall off, first the upper, and then lower. When the disease spreads greatly, the leaves darken completely. Begin to dry, and then completely disappear.
Spores and the mycelium of this pathogen tolerate the winter well, being on the leaves and shoots of the plant.
Every autumn it is necessary to spray all bushes with copper sulphate of 3%. This procedure is performed without fail before shelter for the winter. The system of prevention includes the same activities that are committed to combat the disease.
They include the destruction of all diseased parts of the plant. The leaves are harvested and burned, as well as the shoots. Digging is also necessary to make, preferably with the turnover of the reservoir. “Captan”, “Fundazol”, “Topaz”, “Skor” are suitable from finished preparations for the treatment.
How are people fighting
Immediately it should be noted that most likely, it will not work to cure a rose from black spot with the help of folk remedies alone. It has long been tested by many gardeners. But for prevention, they are great.
You can spray the plant with a solution of water and iodine. Last you need to take 1 ml, which is enough for 400 ml of liquid. Another way - watering solution of mullein. Bred it about 1 to 10, then leave to infuse for several days. Such irrigation is allowed in the period from the removal of the winter shelter and before the buds bloom.
Treat the whole plant can be a decoction of peels of garlic and onions. Approximately 30-40 g of this waste is poured with water and boiled. After that, the solution should be infused for at least 6 hours.
Black spot - the scourge of all gardeners: video
This disease is familiar to all gardeners and gardeners. The fact is that it affects not only flowers, but also a very large number of diverse cultures.
Already from the very name one can understand that the external sign of this disease is the presence of a substance that resembles a powder. Its color may be gray, white. Virtually the entire upper part of the plant is affected by this disease.
They include several basic tasks:
- It is not allowed to thicken the rose bushes. It is very important to thin out the plants.
- It is necessary to make nitrogenous fertilizers strictly according to the calendar. If they overpower the soil, especially after mid-summer, it will lead to illness.
- It is necessary to use fungicides in the period of the formation of flower buds. To do this, these drugs are suitable: "Fundazol", "Bayleton", etc.
- It is necessary to make potassium sulfate with the beginning of the second half of summer.
The simplest, but most important, activities will be useful - pruning all the shoots that are affected by the disease, as well as collecting leaves and their destruction in the fire. Dig up the soil only with the turnover of the reservoir. So pathogens will suffer from lack of air and may die. During the period of awakening of a bush or its falling asleep, treatment with copper sulphate or potassium sulphate with copper sulphate is carried out. Spraying is carried out by means such as colloidal sulfur (1% suspension), or soda ash (50 liters of substance per 10 liters of water).
There are many ways to deal with this problem, since it is very common. One of the proven methods is the zonal solution. It is prepared from 1 kg of sifted ash and 10 liters of water. The liquid must be warm. To insist means it is necessary not less than 3 days, mixing every 20-25 hours.
Perinosporosis - a disease of bad weather
Experts note that tea-hybrid varieties of rose bushes are most often affected by this disease. Usually suffer plants that are located in the shade, while with poor ventilation around the air. As a rule, the problem manifests itself during the period when the humidity is high and the temperature drops sharply.
Signs of the disease are as follows. In the beginning there are spots of incomprehensible shape. They are purple or red. When the disease develops, the leaves wither, weaken. Then they curl up and, in the end, just die. Stems suffer from cracks, and buds also begin to die and darken.
If you look at the sheet through a magnifying glass, then on the back you can see a patina in the form of a web.
How to prevent
Perinospora or downy mildew can be prevented. It is necessary to regularly eliminate weeds, as well as to destroy fallen leaves. This also applies to shoots, whole plants that have suffered.
Digging with the turnover of the reservoir every autumn is required. Nitrogen fertilizers should be treated with caution, applying them sparingly. It is necessary to follow well the soil, airing and temperature conditions. It is important to ensure that water does not fall on the leaves during watering.
How to eliminate the disease in the people
For a long time, shrubs were treated with powdery mildew with horsetail broths, garlic husks, solutions of ash, iodine and milk. The last remedy is prepared as follows: in 9 l of water add 1 l of milk (skim) and not more than 10 drops of iodine (5%).
A decoction of horsetail is prepared as follows. It is necessary to prepare 1 kg of fresh plant or 150 g of dried. At night, the raw materials need to be soaked in 10 liters of water. After this, the infusion should boil and boil for about 30 minutes. After cooling, the substance must be filtered and diluted in a ratio of 1 to 5.
Anthracnose - the problem of cold spring
Although this disease is quite common, it has not yet been fully studied. The first symptoms are small dark spots. They can be confusing, the problem can be confused with black spot. But over time, the spots change. They turn red, purple or brown. Their center is usually lighter, sometimes a hole forms in it.
Mandatory event - pruning. All affected areas are subject to it, including stems, leaves. Then all the waste must be burned, which will help avoid the spread of the fungus.
Every autumn you need to clean the bushes and the area near them. This will prevent re-infection.
How to fix the problem
When traces of anthracnosis are already seen on rose bushes, it is necessary to urgently apply microbiological preparations. Perfectly fit "Gamar" or "Fitosporin-M". In the autumn, it is possible to treat rose bushes with such preparations as “Ridomil”, “Fundazol”, etc. It is advisable to alternate them, otherwise plants become addictive.
Infectious burn - the problem of wounded flowers
The rose bush can become infected with this disease during the rest period - in the fall or spring. For example, if there is no proper care, the spores of the fungus enter the stems through cracks caused by severe frosts. Another route of infection is wounds that are formed when improperly pruned or processed after it. Also contribute to the infection of weather conditions - the absence of wind, too high humidity. It may also lead to deterioration of the condition later fertilization with nitrogenous substances.
This disease is also called stem cancer. It manifests itself in the form of dark ulcers on the stems, which lead to the death of the shoots. Over time, ulcers can be seen more and black dots, which help the disease spread.
Infectious burn prevention
- First, in no case should the plants be allowed to freeze. This provokes the appearance of cracks through which infection occurs.
- Secondly, the shelter should be carried out in a timely manner and in the right conditions. The temperature should not exceed 100 ° C, and the humidity should be moderate.
- It is important to process the soil before the shelter with special means: Bordeaux liquid (1%) or copper sulphate (3%).
- Every time before cutting roses, it is very important to disinfect the instruments.
- Spray potash fertilizers from the beginning of the second half of summer.
All shoots that are already damaged by the disease must be removed. But it is important not to damage the ulcers. Small wounds should be cleaned with a sharp knife, for example, for paper, to healthy flesh. Then they are covered with garden pitch. Every week, diseased bushes must be treated with the HOM fungicide.
Infectious burn after winter on roses: video
Gray rot - a common parasitic fungus
There is a problem in such conditions as too thick planting, cold air and high humidity, as well as improper use of nitrogen-containing substances for fertilizer. The main symptom of this disease is gray spots. They can be seen on all parts of the bush: leaves, flowers, stems and even buds. With the development of the disease, these spots become yellow, rotten patches appear, they begin to die off.
How to carry out prevention
Precautions include permanent soil loosening. It is also important to do mulching. It is also necessary to apply fertilizers that prevent the reproduction of fungi. These include manganese-containing drugs. Inside the plant, they enhance oxidative processes.
It depends on the stage of development of the disease. If it is just beginning, then the following steps should be taken:
- All sick parts, shoots must be destroyed,
- Plants need to provide dry living conditions.
If the plant is already badly damaged, then you can not do without special substances. It is necessary to spray the roses with a solution of "Fundazol" (0.2%). There is one more measure - the most extreme. Every two weeks the bushes need to be sprayed with Bordeaux mixture (1%).
This disease is often difficult to overcome light decoctions or infusions. But, like other fungal diseases, you can try to prevent or eliminate gray mold with a decoction of horsetail.
Gray and root rot: video
The rose is a thorny plant, but very gentle. It is susceptible to various diseases, but because of this, it is not necessary to abandon the cultivation of this culture. You just need to know what and how to do to overcome the disease. Then in your garden there will be incomparable, beautiful queens of flowers.
What and why are sick roses
The classification of diseases of roses is the same as that of human pathologies. Depending on the cause of the disease, the following diseases are released:
Infectious diseases are those that develop as a result of the defeat of roses by pathogens. Most often in their role are various fungi. Less commonly - viruses and bacteria. Infections are dangerous because, if left untreated, they quickly spread throughout the garden: then not only roses, but also other plants are affected. You can compare them with the flu or chickenpox in humans.
Fungal infections develop during the formation of favorable conditions for the growth and reproduction of fungi, the spores of which are everywhere: in the soil, in the air, on various surfaces. Bacteria and viruses carry pests that first lived on a diseased plant, and then switched to a healthy rose.
Diseases of a non-infectious nature include those that are caused by inappropriate conditions for keeping and improper care of roses. You can compare them with the illnesses of a malnourished person who develops iron deficiency anemia, vitamin deficiency, hypokalemia and other deficient states.
Viral infections of roses: symptoms, treatment, prevention
Viral diseases in roses are rare. There are more than a dozen viral infections that can hit the queen of flowers. But gardeners in most cases face only three of them.
- Rose Stripe Virus. The edges of the leaves of roses turn brown. Streaks darken. Brown spots and stripes are visible on the surface of the sheet.
- Rose Mosaic Virus. Light green and yellow spots appear on the leaves, which, merging together, form a mosaic pattern. If untreated, the disease goes to the stalks, buds and flowers. In diseased bushes, the shape of the shoots is disturbed, and the leaves curl. The rose begins to lag in growth and bloom badly.
- Rose wilt virus. At defeat of a rose by this virus the bush completely stops roses. Instead of leaves, there are drying threads. As a result, the plant dies.
Unfortunately, there are no antiviral drugs for roses. Therefore, if the flowers are sick, they must be destroyed before the infection has passed to the neighboring bushes. If the symptoms of the disease appear only on certain parts of the plant, you can first remove them, keeping the bush. But if the signs of infection continue to spread through the bush, it will have to be dug and burned.
It is better to prevent viral diseases of roses, without waiting for their development. To do this, remove the diseased parts of the plants and bushes in time, conduct pest control and use only disinfected garden tools. For their disinfection, you can use medical alcohol or a dark solution of potassium permanganate.
When an infection gets on the stem, dark brown spots begin to appear. Subsequently, extensive ulcers are formed on this site that interfere with the nutrition and development of the infected shoot. The infection can pass to the leaves of roses, then black spots form on them. Over time, the shoots dry up, the leaves finally turn black and fall away.
A cancer-afflicted rose bush needs pruning of diseased shoots. Place the slices need to be treated with 5% solution of copper sulphate and oil paint. If the shoots are damaged too much, it is better to remove them completely and burn them. The same thing needs to be done with a whole shrub, if a large part of the plant suffers from stem cancer.
For the prevention of bacterial stems cancer:
- kill pests in a timely manner
- process rose bushes before building a shelter with 3% copper sulfate solution,
- process the same solution in the spring after removing the cover.
Important!Bacteria are spread not only by pests, but also by air, rain. Therefore, it is impossible to completely eliminate the risk of developing stem cancer.
Pink root cancer is caused by bacteria that live in the soil. They damage the roots when wounds and other injuries appear on them, which may remain after inaccurate loosening. Often the roots are damaged by various pests: a medvedka, a wireworm, a rape.
Bacteria, settling in the cells of the roots, cause their endless division. As a result of this, nodules and growths are formed on the root neck and under the ground. At first they are soft and light, but gradually they darken and harden, and then begin to rot. Since the rose bush feeds on the roots and the root system rots, the above-ground part of the plant first stops growing and then starts to die.
Treatment of root cancer is possible only when the first signs of the disease appear. To do this, the rose bush is dug out completely, cut off all the roots with growths, and treated with 1% solution of copper (II) sulfate. Then he is put on a new place, having previously dipped the roots in a clay mash.
To prevent recurrence of the disease, the bush is regularly watered with a solution of phytoplasmin or Fitolavin. Organic fertilizers are detrimental to root cancer. Therefore, compost and humus can be applied to the soil for roses.
Fungal rose infections: symptoms, treatment, prevention
Fungal infections are frequent diseases of roses. We make a description of the most common infections and tell you how to deal with them.
Перечень грибковых заболеваний роз и их симптомы:
- Mealy dew. На листьях и стеблях роз появляется беловатый налет (см. фото). Обычно заболевание развивается при температуре ниже 18 о С в условиях переувлажненного воздуха. При отсутствии лечения мучнистая роса поражает розовый куст целиком, отчего его питание нарушается.As a result, the growth of shoots slows down, they bend and die.
- Downy mildew. Purple or dark red spots of various forms form on the leaves of the plant. Subsequently, they are deformed and fall off. The affected roses also darken and die flower buds die. Cracks and other damage appear on the stems. On the back of the leaves with a magnifying glass you can detect plaque in the form of cobwebs.
- Rust. On the leaves of roses appear yellow bulging spots with a rusty shade - this is fungal spores. The infection causes twisting and cracking of the shoots.
- Infectious burn. With frequent overmoistening of the soil and air, rose bushes are affected by a marsupial fungus, which is the causative agent of a disease such as an infectious burn. First, the affected shoots are covered with brown spots. Then they become brown, and at the edges - reddish. Subsequently, in their place, small ulcerations begin, after which brown-colored growths are formed. As a result, the affected stalks dry out and die.
- Gray rot. The first signs of the disease usually appear in winter when the rose is under cover. Therefore, in time to notice the gray rot is impossible. Its development is caused by a violation of the timing and order of the shelter of roses for the winter. First, brownish spots appear on the shoots. Then in these places gray down develops - it is a mycelium. After this growths are formed containing spores of fungi. Sometimes a rose gets gray rot in the summer, when it is time for cold rains, the soil does not dry out and there is no sun.
- Sclerotic rot. This disease is less common than others. Its pathogen, the fungus, most often affects the roots of the room rose. This happens when the house is very hot (the temperature exceeds the mark of 30 o C), and the humidity of the air is very high, and the ground never dries out. As a result, the roots rot and become like threads. Usually, sclero-social rot occurs in indoor orchids, but the disease is easily transmitted to other indoor plants through untreated garden tools and unwashed hands.
- Black spot. Black spot fungus develops in warm weather in conditions of impaired ventilation and stagnant moisture in the soil and air. The first symptoms of the disease always appear in the lower part of the plant. Black and brown spots appear on the leaves. Then the infected leaves turn yellow, and they fall off, and the infection rises upwards, hitting new leaves. As a result, young shoots do not have time to mature and die in winter.
Ways to treat fungal infections
Methods for the treatment of fungal infections are identical for all types of diseases in this group:
- Parts of the plant that are stained, mold and rot need to be removed and burned. If the symptoms of infection manifest themselves in almost all the bush, it is better to dig it out along with the roots and burn it so as not to infect the neighboring plants.
- Healthy parts of the plant and neighboring flowers should be treated with a fungicide solution or other drug with a pronounced antifungal effect.
- Watering should be reduced so that the soil has time to dry.
- For roses growing in the home, it is necessary to ensure optimal conditions of detention, providing for moderate humidity and average air temperature.
- If the roots of a room rose are affected by rot, the flower should be transplanted. Before transferring to a new pot, the damaged roots are cut off.
The following drugs have proven themselves in the fight against fungi:
Fungi like stagnant moisture and air. Therefore, the best prevention of fungal infections of roses is a moderate watering and regular loosening of the soil. It is impossible to allow the thickening of rose bushes, since with a close arrangement of the stems between them the air exchange is disturbed. Therefore, it is necessary to promptly remove greasy shoots and those branches that grow inward, not in the direction of the bush. Roses also benefit from a weekly preventive treatment with a 2% solution of Fundazole. Spraying with fungicides is also necessary before building a rose cover and every spring after removing it.
Diseases of non-infectious roses: symptoms, treatment, prevention
Diseases of roses are not necessarily associated with the defeat of pathogens. Sometimes they are caused by deficient states in which an insufficient amount of minerals is supplied to the aboveground part of the plant. And sometimes they are the result of improper watering, after which the leaves of roses get burned.
This is the name for the disease of roses, which disrupts the synthesis of chlorophyll - the green pigment of the leaves. As a result, they become light, a yellow tint appears. Old leaves disappear, and new ones grow small and weak. The shoots cease development, and the growing points dry out.
Causes of chlorosis:
- a lack of minerals such as magnesium, iron and nitrogen in the soil,
- acid reaction of the soil,
- lack of space for the development of the root system (too close a pot of indoor roses).
Treatment of chlorosis is to create favorable conditions for the growth and development of roses. In case of acid reaction of the soil, it is alkalized by adding ash into the soil (300-400 g per m 2) or dolomite flour (200-250 g per m 2). Iron deficiency can be replenished with iron sulfate (10 g per liter of water). Organic fertilizers are suitable for nitrogen fertilizing: mullein (1 kg manure per bucket of water) or bird droppings (0.5 kg per bucket of water). For magnesium feeding, magnesia is used (25 g per bucket of water).
Prevention of rose chlorosis is the timely feeding of the shrub. And for indoor flowers, it is necessary to provide for an annual transplant in a new, larger pot.
Deficiencies of roses
Let us describe the symptoms and method of treatment of deficiency of individual trace elements in roses:
- Phosphorus. The leaves become dark green in color with a purple or reddish tint. They become small and narrow. Shoots slow growth and become curves. Treatment: watering with superphosphate solution (1 box of matches on a bucket of water).
- Potassium. The leaves turn yellow, but their veins keep their green color. Then they dry from the edges and turn purple-red. Gardeners usually encounter potassium deficiency in roses if sandy or peaty soil prevails in the garden. Treatment: watering with a solution of potassium sulfate (1 matchbox fertilizer per 10 liters of water).
- Calcium. Sometimes a calcium deficiency develops with an excess of potassium. This stops the growth of the roots and the aerial parts of the plant. Buds are not formed, and the leaves are crocheted. Treatment: watering with a solution of calcium nitrate (1 box of matches in a bucket of water).
- Iron. The leaves become pale, their color can become almost white, but the streaks retain a light green tint. If iron deficiency is caused by an alkaline soil reaction, it should be acidified with any organic fertilizer that is in the decomposition stage. If there is really little iron in the soil, then the roses should be poured with a solution of ferrous sulfate (10 g of salt per bucket of water).
- Boron. The tops of the shoots die off. The leaves are deformed, and their edges are wrapped up. Treatment: feeding with ash, which is a source of boron.
- Manganese. The leaves become yellow in the center, but remain green at the edges. A green stripe is preserved around the veins. Such symptoms appear on old leaves, because they give manganese to transport it to young leaves and shoots. The cure: fertilizing with complex mineral fertilizers and soil oxidation. You can acidify the soil by adding peat, needles or fertilizers such as potassium sulphate or ammonium sulphate.
- Copper. The buds die off, the tips of the leaves become sick. As a result, the leaves fall off, never yellowing. To compensate for the copper deficiency, you can use copper sulphate (20 g per bucket of water) or complex mineral fertilizers for roses or flowering plants (Kemira, Zdravna).
To prevent deficient conditions, feed the roses at least 3 times during the season with complex mineral fertilizers.
Burn rose can get in the bright sun is hot. But more often, burns cause improper watering. Watering roses should be at the root in the evening, when the sun has set, or in the morning, when the sun has not yet risen. If you water the bushes during the day under the scorching sun, the water that falls on the leaves, acts as a magnifying glass. As a result, burnt spots are formed, which can not be cured. The only way to deal with these - no longer allow such situations.
Natural aging of roses
Roses also tend to grow old. At one place the bush can grow about 25 years, sometimes up to 30-40 years. Then he dies. Nothing can be done about it. But you can replace the old bushes with new ones. To do this, gardeners either buy new seedlings or root their own harvested cuttings.
We reviewed the main diseases of roses. Now you know how to distinguish infectious diseases of roses from non-infectious diseases, and how to deal with them. But it is better not to let them at all. To do this, properly care for roses: water moderately, loosen, feed and trim in a timely manner.