Keeping of

Diseases of a dog rose prevent to receive that result on which each gardener counts at disembarkation of bushes. The description presented in the article will help to notice signs of trouble and take measures for rehabilitation. We advise you to read in advance the description of rosehip diseases and methods of treatment, because when an infection begins, there is often no time left to search for information.

Usually, wild rose bushes are affected by viruses, bacteria and fungi. For the penetration of these pathogenic microorganisms, it is important to have a high level of humidity, the absence of regular ventilation of the branches, the accumulation of weeds and many other factors. Timely and proper care for shrubs eliminates the need to carry out chemical treatment.

Look at the common diseases of wild rose in the photo, description and treatment methods are presented in a simple and easy to understand form:

Dogrose diseases and ways to deal with them

Diseases of roses and the fight against them are the immediate problem of a novice grower. It was for such people that this article was prepared. It presents the most common diseases of roses with a description of the symptoms, photographs of damaged areas and ways of dealing with infections in the garden with their own hands.

Look at the hips and their treatment in the photo, which illustrate the typical signs of pathology and methods of agrotechnical control of pathogens:

Diplodio necrosis of the cortex.

Pathogen - mushroom Diplodia rosarum Fr. On the stems of roses appear large dark brown areas of dried bark. Under it, numerous small black fruit bodies form over time. The affected bark dries out and the stems gradually die off. With a strong spread leaf diseases large brown spots of irregular shape appear, without a border, on which small dotted fruit bodies of the wintering stage of the fungus are also formed. Bushes lose their decorativeness, bloom poorly, with a strong spread of necrosis completely dry out. The infection persists in plant debris and in the cortex of the affected stems.

Control measures. Use healthy planting material without any necrosis of the bark and ulcers on the stems. Timely pruning of affected branches and stems with ulcers, coating slices with oil paint on natural linseed oil, spraying the plants on the bark before the leaves of 1 are mixed with% Bordeaux mixture or its substitutes (HOM, Abiga-Peak).

Further, the symptoms of this disease of roses with photographs illustrating the signs of affection and the methods of control are clearly shown:

Range cancer stems.

The causative agent is the mushroom Diaporthe umbrina Jenk. On the stems appear small purple spots merging with each other, which gradually dry out. The tissue of necrosis in the center is gray, pressed, and shallow brownish ulcers are formed, surrounded by a reddish purple border. Sporulation in the form of small black concentrically located points is formed on the surface of the affected tissue. Stems gradually dry up. Often and on the leaves of the affected stems, numerous small irregular-shaped spots are visible, surrounded by a reddish-purple border, on which sporulation in the form of concentrically located points is also formed. Infection persists in affected stalks. With a strong development of the disease, the bushes dry out completely for 2-3 of the year. Climbing roses are very strongly affected, in which the necrotic areas of the bark appear in the lower part of the stems and gradually spread upwards.

Control measures. Same as against diploid necrosis of the cortex.

Look at these diseases of the hips - the photo shows the symptoms and how to treat this infection on your site:

Infectious burn or cancer, stalks.

The causative agent is the mushroom Coniothyrium wernsdorffiae Laub. On the stems appear red-brown, then grayish-brown with a red border large enclosing spots. The bark dries, brightens, edging disappears, cracks appear and shallow ulcers form. Numerous small brown-colored fruit bodies of the hibernating stage form in the affected bark, the stalks dry out. The infection persists in the affected bushes.

Control measures. Same as against diploid necrosis of the cortex.

Rose Hip Diseases

There are various diseases of wild rose bushes, in which the stems and lignified parts are predominantly affected.

Cytosporosis branches.

The causative agent is the cytospora rosarum grev mushroom. The disease is manifested by browning and death of the bark of the branches. On the affected tissue numerous bulging stroma is formed in the form of gray-brown tubercles. At first they are submerged, then bursting through, obtuse. The affected bark dries out, but does not exfoliate, but urinates. The fungus penetrates the plant through mechanical damage and spreads from the bark to the cambium and wood, causing premature drying of the branches. The infection persists in the affected branches.

Control measures. Same as against diploid necrosis of the cortex.

Shrinking branches.

The causative agent is the fungus Botryosphaeria dothidea (Moug et Fr.) Ces. et d N. On the affected branches, numerous cushion-shaped or flattened-cone-shaped stromas form, which are often located in close, often merging groups. Single-row fruit bodies, brown in color, immersed in the stroma. The branches turn brown and dry. The infection persists in the affected branches of the bushes. Shrinking branches rose bushes and dogrose can also be caused by other mushrooms: Eutypa flavovirescens (Hofft.) Sacc., Cucurbitaria occulta Fckl., Valsella rosae Fckl., Valsa ceratophora rosae Fckl., Microdropdia rosarum Died., Spaeropsis rosarum Ces. et Ell., Hendersonia canina Brun. In all cases, the stroma in the form of tubercles of various shapes and colors are formed on the affected cortex. The fungus can be identified only when performing mycological analysis of the affected material.

Control measures. Same as against diploid necrosis of the cortex.

Rose Hip Disease Rust (with photo)

Rosehip Rust

The causative agent of rosehip disease is rust - mushroom Phragmidium disciflorum (Tode) James. Stalks, young shoots and leaves are affected. Young shoots at the base of thicken and crack. The cracks are spores in the form of a rich dusting yellow powder. The cracks widen over time and in their place shallow brown ulcers form. On the leaves, rust appears as separate round spots without edging, on the reverse side of which orange pustules with spores grow. With the mass manifestation of the disease, the leaves are covered with numerous scattered round yellow spots, on the reverse side of which numerous orange pustules form. The affected leaves fall prematurely, the shoots turn brown and gradually dry. The infection persists in plant debris and bushes affected by stalks. Often affects standard roses, in which in the area of ​​the root collar and the lower part of the stem, brown ulcerations with abundant yellow sporulation are noticeable.

Control measures. If a rose disease of rust is detected, then its treatment begins with such agrotechnical techniques as pruning of affected stems and shoots, collection of all plant residues. Disinfecting individual 3 ulcers with copper sulfate. Spraying the bushes before the leaves grow with 1% Bordeaux mixture or its substitutes (HOM, Abiga-Peak).

Look at rose hips disease in the photo, where the main signs of pathology are illustrated:

Rose Hip Disease - Powdery Mildew

The causative agent of this disease is the fungus Sphaerotheca pannosa Lev. var. Rosae Voron. The disease is constantly manifested in young leaves and stems with buds. First, a white powdery sporulation plaque appears in the form of individual spots, then the spots quickly increase and cover leaf blades and shoots completely. Over time, the plaque becomes denser, becomes gray, and numerous small, black fruit bodies of the wintering stage of the fungus pathogen form in it. The leaves turn brown, dry and fall prematurely. Young shoots are deformed, the affected buds do not open and dry out. By the fall, on the affected shoots, fruit bodies of the wintering stage are formed, of which in the spring of the next year the mycelium grows with spores in the form of rounded convex, quickly drying spots.

Control measures. If powdery mildew is found, then all plant residues are collected, pruned and burned dried and deformed shoots. At the manifestation of the first spots of mealy plaque, spraying the bushes with one of the following preparations: swiftly, rajek, tiovit Jet, phytosporin, alirin.

The manifestation of this disease in the photo illustrates the nature of the damage, symptoms and primary signs:

Rosehip leaf diseases and treatment (with photo)

We continue to treat hips and their treatment with the help of special chemicals.

Pestalocia.

The causative agent of rosehip leaves is the mushroom Pestalotia rosae West. On the leaves at the edges of the leaflets appear brown, growing to the middle of the spot. On the border of healthy and necrotic tissues there is often a characteristic yellow band. On the upper side of the spots numerous grayish rounded pads of sporulation of the fungus develop. The affected leaves turn yellow and dry prematurely. On young shoots, often in a protected ground, depressed necrosis of grayish-brown color develops, on which sporification in the form of grayish pads also develops. Mycelium grows into the wood of the shoot, necrosis deepens, becomes a brown ulcer, the shoots gradually dry out. Infection persists in plant debris and in affected stems. When this disease of rosehip leaves appears, treatment and treatment should begin immediately.

Look at the typical symptoms of this disease of rosehip leaves in the photo, which will make it easy to recognize this ailment when it appears:

Control measures. Use healthy planting material without any necrosis of the bark and ulcers on the stems. Timely pruning of affected branches and stems with ulcers, coating slices with oil paint on natural linseed oil, spraying the plants on the bark before the leaves of 1 are mixed with% Bordeaux mixture or its substitutes (HOM, Abiga-Peak).

Black spotting.

The causative agent of the disease black spot - mushroom Marssonina rosae (Lib.) Died. Leaves on the upper side initially form single, then multiple rounded, radiant spots of purple-brown or almost black color with a diameter of 5-15 mm. Over time, the sporulation of the fungus develops in the form of numerous blackish rusts along necrotic tissue. Radiant spots and sporulation may occur with a strong spread of the disease and on young annual shoots of roses. Leaves affected by black spot turn brown, fall prematurely, strongly baring flowering bushes. Young stems are weak, often without buds, by the fall they ripen poorly and because of this they freeze slightly. The infection persists in the fallen leaves and in the cortex of the affected stems.

Control measures. Before you start treating the disease of rose black spot, it is necessary to carry out such agrotechnical measures as collecting plant residues, pruning the affected dried shoots, and coating the cuts with oil paint on natural drying oil. Spraying of plants in spring, when buds are blooming, and again before flowering, 1% Bordeaux mixture or its substitutes (HOM, Abiga-Peak).

Septoria spot.

The causative agent of rose disease septorioznaya spotting - mushroom Septoria rosae Desm. The spots on the leaves are numerous, scattered, rounded, dark brown. The necrotic fabric in the center brightens, but there is always a thin brown rim. Over time, small black fruit bodies form during the hibernating stage of the fungus pathogen. Affected leaves turn yellow and fall prematurely, strongly baring flowering bushes. With a strong spread of spotting leaves are necrotic spots appear on petioles and young stems. The spots on the stems are small, round, light in the center and surrounded by a thin brown rim. As the bark dies and fruit bodies form in it, the stems gradually dry out. The infection persists in the fallen leaves and in the cortex of the affected shoots.

Control measures. Same as against black spot. Before treating roses from diseases of this type, it is necessary to find and destroy the source of the spread of infection throughout the site.

How to spray from diseases of the hips

Causative agent fruit diseases wild rose, in which there are spots on the berries - the mushroom Phyllosticta rosae Desm. The spots on the fruits are round, scattered, dark brown with a wide purple-brown border. Over time, the center of the necrotic tissue becomes ashen gray, but a wide purple border always remains. Often there is another fungus, Phyllosticta rosarum Pass., Which causes the formation of grayish-white spots with a broad purple border. In the center of the necrotic spots, small dotted black fruit bodies form during the wintering stage of the fungi. Affected leaves turn yellow and fall prematurely. Infection persists in fallen, affected leaves.

Control measures. Same as against black spot. Before spraying wild rose hips from diseases, remove all affected parts of the shrub.

Rose Hip disease

The following describes viral diseases of wild rose and how to combat these infections.

Tomato Bronze Virus.

When a tomato is infected with a Tomato spotted wilt virus (TSWV) bronze, pale chlorotic patches appear first, the veins of the apical leaves lighten, then necrotization occurs. The leaves turn yellow, shallow. Ring spotting, dark green mottling, banding, deformation of leaves and flowers may be observed. The virus has a wide range of host plants, distributed on tomatoes, tobacco, flower crops. Transmitted by plant sap and transported by several species of thrips in the larval stage.

Control measures. Timely pruning of leaves, stems with symptoms of viral infection, removal and burning of heavily affected plants. Disinfection of garden tools (knives, pruners) in alcohol, cologne, 1% potassium permanganate solution after working with affected plants. You can not use cuttings from diseased plants for rooting. Spraying plants against thrips and other sucking pests with one of the following drugs: fufanon, kemifos, fitoverm, aktellik, aktar, spark, Inta-Vir.

Striped leaves of wild rose.

The causative agent is the dog rosehip rose streak virus. On the young leaves, brown rings and mottled edging of the veins appear, blurry stains and greenish-brown spots are visible on the shoots. Affected plants are stunted and bloom poorly.

Control measures. Same as against the tomato bronze virus.

Tobacco necrosis virus.

Tobacco necrosis virus (TNV) tobacco necrosis virus is manifested by a systemic necrotic reaction. Necrotic spotting of irregular shape appears on the leaves, which is concentrated, necrosis occurs, the veins darken, the leaves die prematurely. Deformation of leaves, dwarfism of plants, lack of flowering can be observed. The virus infects vegetable, technical, fruit and berry, flower-decorative cultures. The host plant circle is represented by plants of more than 40 families. Transmitted by plant sap and zoospores Olphidium brassicae.

Control measures. Same as against the tomato bronze virus.

Tomato ring spot disease.

Tomato ringsport virus (ToRSV) tomato ring spots virus is manifested by ring spots, chlorosis, leaf wrinkles, necrotic spots, and jaundice. A typical feature is the alternation of light and dark green areas. The virus infects plants from the 35 families and is ubiquitous. It is transmitted by plant sap and nematode, and transmission through plant seeds (tobacco, strawberries, etc.) is registered.

Control measures. Same as against the tomato bronze virus.

Resus mosaic virus.

The Arabis mosaic virus (ArMV) mosaic virus appears as small diffuse spots that gradually cover the entire leaf blade. Chlorotic zones of irregular shape, lightening of small veins, ring spotting appear. It has a wide range of host plants and is transmitted by nematodes and in many plant species by seeds.

Measures struggle. Same as against the tomato bronze virus.

The virus is curly banding tobacco.

Tobacco rattle virus (TRV) is a curly striped tobacco virus that appears as a light green mosaic on leaves, flowers, stems, spots of various shapes, deformation of leaves and petals. The virus has a wide range of host plants, is transmitted by sap, nematodes, and remains in the affected plant debris.

The rose and tobacco spot virus (TRSV), the virus of necrotic ring spot plum (PNRSV), the apple mosaic virus (ApMV), the virus of latent ring spot of strawberry (SLRSV) are very common on roses and dog rose, and a mixed infection, such as ApMV + PNRSV, is very common. As practice has shown, viral infection manifests itself in a complex, the symptoms of pathogens are very similar, and different signs of manifestation are species and varietal characteristics of host plants. It is only possible to identify a specific virus or a complex of viruses that infect a given plant when conducting a virological analysis. The descriptions of viruses in this article are presented for informational purposes only to avoid similar symptoms on roses and wild rose hips in gardens.

Control measures. Same as against the tomato bronze virus.

Jaundice of roses.

The causative agent of jaundice is phytoplasma (formerly mycoplasmal organisms). Young leaves turn yellow veins, leaf blades brighten, rise vertically, often deformed, large areas of yellow color appear. Shoots develop thin, chlorotic, petals are often deformed. Carriers are cicadas and lisobloshki. Infection persists in infected wintering crops and weeds.

Control measures. Same as against the tomato bronze virus.

Look at how prevention and treatment of rose diseases is carried out - the video shows the main agro-technical operations carried out in the rose garden from spring to late autumn:

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