Preparations for fungal and bacterial rot of irises. Iris family: a brief description

Iris is a very common flower on the planet. It grows well in any climatic and natural areas. To date, breeders have bred many varieties that amaze with their beauty during flowering. The popularity of this flower is due to the ease of breeding and unpretentiousness. But that doesn't mean they don't need special care. If you break the rules, then gardeners will have to face dire consequences. Pests and diseases of irises will destroy a beautiful flower garden. Their treatment (see photo of affected plants below) is much more difficult to implement than to apply regularly. preventive measures.

In this article, everyone can get acquainted with the most common diseases of these flowers and pests.

Iris family: a brief description

Before telling what dangers flower growers involved in the cultivation of irises may face, it is necessary to briefly describe the features of this plant. There are currently many different varieties iris families, which are optimally adapted to certain climatic conditions. Many of them are rhizomatous. They are perennial, so even the lack of snow cover in winter period together with quite low temperatures can kill the plant. Another variety is also found - bulbous varieties. Gardeners living in Russia prefer rhizomatous representatives. They grow well in our climatic latitudes with moderate humidity conditions.

The root system of these flowers is well developed. Most often, it is located shallow in the ground, and sometimes even protrudes. It consists of a rather thick rhizome, from which filiform thin processes extend. During flowering, irises throw out large flowers. Depending on the variety, they can be single or consist of several inflorescences located on a strong peduncle. The range of the palette is so diverse (from white to black) that it is simply not possible to describe everything. Iris inflorescences are both monophonic and multi-colored, consisting of two or more shades. The flowering period occurs at the end of spring and lasts until about mid-June.

The leaves of the iris family are hard and dense. In shape, they are elongated and flat, covered with a waxy coating with a whitish tint.

Iris flowers: diseases

Each gardener must take into account the specifics of the region when growing irises. Depending on the climate, plants are exposed to certain diseases. For example, the northwestern part of Russia is characterized by high humidity, so local irises often begin to rot rhizomes, which is why bacteriosis develops. Rust is a common problem in the Southwest. Read more about these and other diseases in more detail below. In order for the reader to better understand how the affected areas look, a photo will be added to the article.

Diseases of irises and the fight against them directly depend on the characteristics of weather and climatic conditions!

Also, do not exclude pests that can destroy the flower. For example, flower growers in the southern regions have constant problems with the bear. Aphids and slugs, unfortunately, are no less harmful to the flower, so it is important to understand that timely preventive measures will help to avoid various diseases.

bacteriosis

Irises are rather unpretentious flowers, they are resistant to diseases. However, if the rules of care are violated, even these plants become defenseless from various kinds of influences. The most common problem is root rot. Such a disease of irises (see photo of tubers below) is called bacteriosis. It is quite dangerous and can lead to the death of the flower.

The causative agent of this disease is Erwinia carotovora. The bacterium thrives on high humidity Therefore, in no case should the soil be oversaturated with water. It directly affects the rhizome of the plant and causes them to rot. Also, do not oversaturate the earth with organic matter and thin out the flowers in time.

What are the signs of bacteriosis?

• At healthy flower rhizomes are quite hard. In a diseased plant, they become soft.
• The process of decay is accompanied by a strong unpleasant odor.
• The leaves turn yellow, and then completely disappear.

If the rhizomes are badly damaged, then the flower will not be cured. Considering that bacteriosis develops quite quickly at a temperature of +13 ... +17 ° С, the damage that diseases and pests cause to irises is already irreparable. The only thing that can be done is to separate more healthy plants from the sick. The latter will need to be burned. If the soil is severely affected, then it is recommended that flowers that are not infected with bacteriosis be transplanted to another soil.

Prevention and treatment of bacteriosis

As soon as the snow cover begins to melt, it is already necessary to take measures in order to exclude all possible diseases irises. Fighting them will be much more difficult than prevention. First of all, you need to take care of the outflow of melt water. This is especially true if there is no natural slope in the flower bed.

If during the winter there was little snow, and the air temperature is very low, then it is recommended to protect the rhizomes from freezing. It is important to understand that bacteriosis will primarily affect those flowers whose roots have been damaged by frost. To avoid this situation, you just need to wrap them up.

At the initial stage of the disease, only a certain part of the rhizome is affected by bacteria. In this case, it can be removed, and the cut point can be treated with ash. Such measures can be carried out before flowering.

When transplanting iris, it is recommended to treat the roots with a solution of potassium permanganate. To do this, they are soaked for 15-20 minutes. It also does not hurt to treat the foliage with urea diluted with sulfur (12%).

Fusarium

In addition to bacteriosis, there are other diseases of irises, and their treatment is not always possible. Enough dangerous disease is fusarium. This gray rot affects not only the roots, but even the leaves. A diseased plant is covered with a gray coating, which provokes the process of decay. The main reason for its occurrence is an excess of nitrogen in the soil. This situation can be caused by misuse mineral fertilizers i.e. overdosing.

Infected tubers are carriers of Fusarium. If you transplant them to another place, then the fungus, getting into the soil, will begin to multiply, which can lead to infection of everything. land plot. The most favorable conditions for it are air temperature + 12 ... + 17 ° С and an excess of moisture in the soil.

The first sign of the development of fusarium is the presence gray spots on the root. It becomes quite loose.

In order to avoid the development of this disease, it is recommended to carefully and regularly treat garden tools, choose a place on a hill for a flower bed and be sure to treat the roots with a solution blue vitriol with the addition of 5% bicarbonate of soda.

wet rot

Diseases of irises and their treatment in practice are quite complex. Most often this leads to the death of the plant. Sometimes diseases affect other flowers. This is what wet rot is. In the process of reproduction of bacteria, not only the rhizomes, but also the leaves suffer. As for the latter, they first change color (become brown), and then dry out. Affected roots look no different, but their insides become powdery. This disease is dangerous not only for irises, but also for tulips, gladioli, hyacinths.

The cause of soft rot bacteria is manure. Many gardeners use it as fertilizer. In order to avoid infection, you will need to treat the flowers before planting with a solution of potassium permanganate. The recommended dosage is half a teaspoon of this product per 500 ml of water. The rhizomes are soaked for 30 minutes.

Botrytis

Fungal diseases of irises are dangerous not only for themselves, but also for neighboring plants. For example, botrytis. The causative agents of this disease are Sclerotium rolfsii and Botrytis convoluta. These fungi develop directly in the rhizome if the conditions for their storage have been violated. The most common causes are poor ventilation and high humidity. To prevent this disease, it is recommended to treat the rhizomes with a solution of fungicides of the triazole class.

Rust

Irises also suffer from rust. This is no less insidious disease. Fungus pathogen - Puccinia iridis. Rapidly develops at a temperature of +12 °C. In a diseased plant, the leaves begin to deteriorate. Pustules dark or yellowish-brown are formed on them. Gradually, tissues begin to die, which leads to the drying of the sheet. Stems may also be affected. The fungus is able to persist in the soil for a long time.

heterosporiosis

Consider another disease caused by the fungi Mycosphaerella macrospora and Heterosporium iridis. It's about about heterosporiosis. The affected area is the leaves. Gray-white spots appear on their surface. They have a characteristic yellow border. Tall and old leaves are most susceptible to infection. From a small spot, the fungus can grow to the entire bush. These can be the consequences (below, see an example with a photo).

Diseases of bearded irises and other varieties, of course, are easier to prevent than to cure a flower later. First of all, it is recommended not to overdo it with potassium and phosphate fertilizers. Also, in order to prevent heterosporiosis, you can spray the bushes with fungicides. If, nevertheless, the disease has already appeared, then the diseased leaves are cut off and must be burned, and the bushes are treated with a solution at least once a week.

Leaf mosaic

Continuing to study the diseases of irises, it is worth talking about viral ones. These include the so-called sheet mosaic. This disease manifests itself in the form of yellowed leaves, which soon dry out. In order to detect the virus in time, you will need to pay attention to the flower. As a rule, in a diseased plant, the color changes greatly, for example, from light ones they can become dark matte. There is also a characteristic spotting.

Treatment of a flower affected by a virus is carried out by spraying with a solution of "Ridomil Gold" and copper oxychloride. Leaves are cut and burned. Whole garden tools subject to disinfection.

thrips

Irises suffer not only from fungus and viruses. Diseases and pests (photo - a vivid example of this) are striking root system, stems and leaves. dangerous insects that can harm the flower, a lot. These include thrips. Their favorite place is the leaf axils. They feed on cell sap. As their number increases, the leaves of the flower become brown, later dry completely. Spots appear on the roots.

Pests: bronze beetle and nematodes

Bronze beetles appear in flowerbeds in late spring. They are quite large - about 2 cm. They have a characteristic green tint. You can protect irises from them with Kinmiksom. Diluted as follows: in one liter of water 2.5 g of the drug. In order to prevent these beetles, you can use an ash solution.

Iris diseases are also caused by nematodes. These worms feed on cell sap. They don't even die hard frost. The leaf at the puncture site first begins to turn brown, then dies off. There are several ways to infect the soil with nematodes:

• through weeds and inventory;
• through rain water.

Medvedki and owls

Medvedki can deliver a lot of trouble to gardeners. They live in the soil. Moving, their powerful jaws damage the roots and stems of plants. Bait must be used to control these pests. A mixture consisting of karbofos, grain and oil is added dropwise to the ground.

Scoops also do a lot of harm. These caterpillars, getting into the stem, eat everything from the inside. A large concentration of them can be found in wet areas of the soil. For prevention purposes, it is recommended to prevent weeds from overgrowing flower beds, and also regularly loosen the ground between rows. This should be done especially carefully during the laying of eggs. It is very good to use Bordeaux liquid for iris disease caused by butterfly caterpillars. A solution is made from milk of lime and copper sulfate. You can spray plants only before the start of the flowering period. This will help avoid pest problems. However, if the moment has already been missed, then it is recommended to process irises with hellebore Lobel.

Irises are among the most resistant to diseases and pests. ornamental plants. These flowers are a favorite object of selection for many summer residents (here is an article about them), in the process of breeding new varieties of which it was found that the most exquisite irises are most susceptible to various diseases and pests. At the same time, there is a clear distinction between the occurrence of diseases in flowers, depending on the climatic zone. So in the north-west of Russia, irises are most often affected by soft rot (bacteriosis), and in the south-west - by rust.

Iris affected by viral diseases are not treatable. They need to be dug up and burned. Special attention attention should be paid to the preservation of the tubers of the plant, since they are often damaged by various diseases and a variety of gnawing insects. Compliance with all the requirements of agricultural technology and the use of safe planting material allows you to minimize the risk of damage to country flowers by diseases and pests.

The most dangerous diseases for these flowers are:

Fusarium

The leaves become yellowish, and then acquire a brownish tint.

How and what to treat

We add 0.2% Fundazol under the rhizomes of irises. Before planting young plants, the rhizomes are disinfected in this solution for 0.5 hours.

spotting

Spots of various shades appear on the leaves and stems of the iris.

Spray treatment

We spray the flowers with a 1% solution of Bordeaux liquid or 0.3% copper oxychloride.

Septoria / heterosporiosis

Yellowish spots of various sizes appear on the leaves of the iris. Later they turn brown and coalesce. The leaves dry out and the plants bloom poorly. The disease most often develops in wet weather, as well as with a deficiency of phosphorus and calcium in the soil.

At the first signs of the disease, we spray the irises with 0.3% copper oxychloride; 0.4-0.5% colloidal sulfur.

Wet rot (bacteriosis)

The rhizome rots, the tops of the stems turn yellow and dry. They show obvious signs of decay. After a while, the affected parts of the plant die off.

How to treat

We dig up specimens affected by this disease and burn them. The soil is disinfected with formalin.

Description of the signs of the main pests of irises, how to deal with

The most common for this type of flowers:

Winter Owl / Iridescent Owl

The most commonly affected are bearded and Siberian varieties. The disease progresses rapidly in hot weather. Insects gnaw out the bases of peduncles. Caterpillars of these pests also gnaw on rhizomes. Because of such insects, the risk of plant damage by bacterial rot increases.

Means of struggle

At the beginning of the period of active growth, we process the flowers twice with 10% karbofos. The interval between sprayings is 7 days.

Medvedka

On the tubers, areas damaged by the bear are visible. With large "wounds" the iris may dry out altogether.

Control measures

We fill the earthen passages of this pest with soapy water, and after the bear crawls out of the hole, we destroy it. Next to the bushes of irises, we close up bait granules for these insects in the ground: Medvetoks, Thunder, Grizzly. Medvedka eats soaked granules better, so we water the ground around the flowers.

thrips

These microscopic insects take up residence in the densely compressed leaf openings of the plant. Irises damaged by pests are distinguished by brown leaves that dry out quickly and become covered with dark crusts. Thrips also damage buds, causing discoloration of tissues and deformity of flowers. Most often, these pests appear in hot weather.

Fighting methods

We spray the bushes twice with 10% karbofos. The interval between sprayings is 7 days.

Slugs

These mollusks eat flowers, and sometimes damage the young leaves of the plant, leaving oblong holes on them. They thrive especially in wet weather.

Means of struggle

We collect slugs manually and destroy them. We spray irises with tobacco infusion or superphosphate. We scatter metaldehyde on the ground (40 g / 10 sq.m.), which is detrimental to these pests.

wireworm

These larvae of click beetles eat out passages in the rhizomes of flowers for themselves, thereby increasing the risk of their being affected by various diseases.

Fighting methods

We make deep winter digging of the soil. We spray the bushes with infusions of red hot pepper (100 g of crushed pods are steamed with 1 liter of boiling water, we cook the infusion for 1 hour, we insist it for two days). We also pollinate irises with Pyrethrum (200 g / bucket of water we insist for 10-12 hours and spray with a solution of the plant).

Chafer

The larvae of this pest gnaw rhizomes, which inhibits the growth and development of flowers.

How to fight

When digging the earth, we remove the larvae manually. Before planting the rhizomes of irises, dip them in a mixture of liquid clay and Bazudin (100 ml per bucket of water).

Nematodes

Plant tissues damaged by the pest acquire a brown tint.

Control measures

We burn damaged copies. The place where they grew is watered with a 10% formalin solution. Before planting the rhizomes, we warm them in warm water(50 ° C) for half an hour.

Irises have long been permanent residents of our gardens. These beauties are quite unpretentious, but nevertheless, from time to time, gardeners are upset by the diseases of irises and the fight against them takes a lot of time and effort.

The more refined the plant variety, the more susceptible it is to diseases. The most common and common varieties have greater immunity. Below we will consider what diseases irises can have, how to prevent them and what to do if the plant is still sick.

Iris diseases and their treatment

In comparison with others perennials, irises are less susceptible to various diseases, but still not 100% protected from them.

Fungal, viral and bacterial diseases. Experienced gardener must be able to distinguish and treat them.

As a preventive measure, spraying with Bordeaux mixture before and after flowering works great. .

For convenience, the diseases are listed below in alphabetical order.

Alternariosis

This virus is fungal.

signs: the edges of the leaves begin to become covered with a black coating and die off.

What to do: Unfortunately, the plant will have to be removed. The virus spreads not only through contact, but also through the ground. After the plant has been removed, it is necessary to cultivate the soil.

Ascochyta or leaf spot

Also a fungal infection.

signs: watery spots appear on the edges of the leaves Brown. The leaves are starting to dry out.

What to do: preparations containing copper will help to overcome diseases. It should be noted that the disease remains both in the ground and in all parts of the plant. The method is suitable for any kind of iris spotting.

heterosporiosis

Infection develops rapidly in rainy summers. Moisture and heat only contribute to the deterioration of the plant.

signs: starting from the bottom, the leaves begin to die off gradually. White-gray spots become a harbinger, which gradually increase in size. The disease spreads to all leaves and eventually destroys the plant.

What to do: you need to constantly remove and dispose of the affected areas of the plant.

It is necessary to process irises with products containing zinc and copper.

Mosaic

Here, the ubiquitous aphid becomes the carrier.

Signs: small stripes and spots on the leaves.

What to do: no cure for this infection has yet been found.

The focus here is on prevention. You need to tirelessly fight aphids and immediately remove infected plants.

Rust

fungal disease, whose spores remain and develop in leaves and soil.

signs: leaves begin to dry gradually, curl. Get brown.

What to do: sulfuric solution every 2 weeks.

To prevent it, you need to keep irises in the same place for 3-4 years. Good drainage is also required.

Wet rot or bacteriosis

Still showing up in early spring refers to bacterial diseases.

signs: brown spots on the tips of the leaves. their subsequent drying. There is a smell of rot at the base.

What to do: Infected tissue should be cut to healthy. Treat with potassium permanganate.

Always remove affected foliage and plant debris in the fall.

Gray rot

Fungal disease, activated when high humidity.

signs: stems and leaf tips rot and become covered with bloom gray color. The tubers of the plant also suffer.

What to do: do not flood the plants, even temporarily stop watering. Remove infected parts of irises, do not leave them on the site.

Dry rot or Fusarium

signs: infection starts from the rhizome and gradually clogs all channels. The leaves quickly wither, the plant dies.

What to do: destroy or remove the dead plant. Treat neighboring plants with fungicides, and pour copper chloride over the growth site of the deceased.

Do not spray during flowering!

The most important thing in the fight against diseases is the prevention and observance of agricultural technology. Beautiful and healthy plants for you!

Fighting bacterial rot on irises - video

Signs of the disease. Oblong grayish-brown spots with a darker border appear on the leaves. At strong development disease leaves dry up. The disease does not spread to the rhizome.
Control measures. Destroy plant remains and dried leaves. Apply spraying with cuproxate. Plants are treated with copper-containing preparations, for example, a suspension of copper oxide (0.3%) or Bordeaux liquid with the addition of adhesives. Bordeaux liquid (1-1.5% solution) can be prepared independently: 100 g of copper sulfate and 75 g of slaked lime per 10 liters of water. The soil around the plants is also shed with a solution of copper-containing preparations. Fungicide sprays are also effective. It must be remembered that you need to use only those drugs that have received permission for use in personal subsidiary plots. With combined treatment, protection against heterosporiosis and harmful insects is combined.
Prevention. To increase the resistance of irises to this disease, spring spraying leaves with a solution of calcium chloride or calcium nitrate. Calcium helps to increase the strength of cell membranes, and thus, plants become less susceptible to diseases.
To protect against leaf spots that progress in rainy weather conditions, preparations are very effective. new group strobilurins (synthetic analogues of the waste products of some fungi), such as strobes, the peculiarity of which is that they are not washed away by rain for an extended period of up to two weeks. However, strobilurins should not be used more than twice per season, they should be alternated with contact preparations, such as copper oxychloride. Strobilurins, like contact fungicides, have only a protective effect. They do not destroy pathogens, so they must be applied before the spread of diseases.

Rust , the causative agent is a fungus Puccinia iridis.
Signs of the disease. In late summer - early autumn, brown stripes appear on the leaves, which, when touched, leave rusty dust on the finger. Affected leaves dry out prematurely.
Control measures. Large plant residues are destroyed, small ones are embedded in the soil during its cultivation or areas are mulched with peat, humus or sand with a layer of 2-3 cm. At this place, irises can be planted no earlier than after 3 years. Spraying with copper chloride, cuproxate (1%), colloidal sulfur with adhesives is used.
Prevention. Plant resistance to rust is increased by phosphorus-potassium fertilizing. The disease can be prevented by spraying the plants with Bordeaux liquid in the middle of summer.

Wet , or bacterial, rot, bacteriosis ; pathogens - bacteria Pectobacterium carotovorum, Erwinia aroidea, Pseudomonas iridis. This disease affects bearded irises and especially often develops when plants are grown in conditions of high humidity, on heavy soils, when plants are planted deep and when rhizomes freeze.

Photo by L. Treivas from the magazine "In the world of plants" - 2002 - No. 6

Signs of the disease. The leaves turn pale, and then dry up and turn brown. The leaf fan leans and then falls to the ground. The rhizomes and bases of the leaves darken, decompose, turning into a mushy, unpleasantly smelling mass. Plants die.
Control measures. The plant is dug up, its aerial part is destroyed, the soil around is loosened and treated with a solution of a permitted fungicide. The rhizomes are cleaned to a healthy tissue, the sections are washed with a strong solution of potassium permanganate and covered with Novikov's liquid (brilliant green with glue) or sprinkled with crushed charcoal or ground sulfur. The causative agent of rot dies in direct sunlight, so the cut can be dried in the sun. Plants are transplanted to another site. When transplanting, the rhizomes are washed in a solution of formalin (1:300) or chinosol (0.2%). effective method fight against wet rot is also soaking the rhizomes in a 0.01% solution (1 tablet per 1 liter of water) of the tetracycline antibiotic for about 1 hour. Previously, the rhizomes must be dried in the sun - then they absorb the drug better. Prevention. It is possible to prevent the occurrence of this disease by observing the rules of agricultural technology for irises. The main thing is not to overmoisten the planting of irises and make required amount phosphoric and potash fertilizers. As a preventive measure, you can also spray green foliage in spring with a solution of urea with the addition of sulfur (12%), permitted fungicides or a solution of sodium thiosulfate (neutral photographic fixer), which decomposes in the soil to form sulfur.
preventive measure, effective in years with wet summers, are watering the soil with solutions of antibiotics: tetracycline or streptomycin sulfate (agrimycin), which are prepared by diluting 30 g of the antibiotic in 10 liters of water. 60 liters of solution are poured per 1 m2 if the soil is coarse-grained, and 80 liters if the soil is fine-grained. Watering is carried out every 10 days.

Gray rot, botrytis ; causative agent - fungus Botrytis cinerea. The disease is caused by two types of fungus. The first affects the stems and ends of the leaves at high humidity. The second type of fungus causes dry rot of rhizomes. The disease develops in conditions of high humidity, with an excess of nitrogen in the soil, with freezing of rhizomes and the presence of mechanical damage.

affected plant

Photo by L. Treivas from the magazine "In the world of plants" - 2002 - No. 6

Signs of the disease. The peduncles and ends of the leaves become discolored, and then turn brown, rot, become covered with a smoky-gray bloom of the fungus. Black folded heaps are formed on the affected rhizomes, consisting of sclerotia of the fungus. Rot can also spread to the base of the leaves, where a gray coating of fungal spores forms.
For prevention gray mold irises are recommended to be planted in well-drained, ventilated sunny areas. Do not allow a lack of phosphorus and calcium in the soil. Severely affected specimens are discarded. When symptoms of the disease appear, the plants are sprayed with fungicides. When planting, the rhizomes are pickled, the affected areas are removed. It is necessary to carry out disinfection of contaminated soils.

Scorch , causative agent - presumably mycoplasma.
Signs of the disease. The leaves turn brown in the middle of the growing season, their ends, drying up, bend, the roots die off, the rhizome hardens and dries out.
Control measures. Plants are usually dug up and destroyed, and the soil is treated with lime or formalin.
Prevention. Sometimes the affected bushes are restored in the second or third year from dormant buds, but the main preventive measure for this disease is the early division (cutting) of the bushes into several unrelated parts. A transplant is not required. Scorch is not transmitted to neighboring, already isolated plants.

Ascochitosis leaves causes a fungus of the genus Ascohita. The spots are brown, without bordering, with numerous black dotted pycnidia.

Septoria leaves causes a fungus of the genus Septoria. The spots on the leaves are pale gray, with a brown border, small, rounded. Black pycnidia appear on the surface over time.

Ramulariasis leaves causes a fungus of the genus Ramularia. The disease is manifested by brown or even black small, rounded spots, which turn pale in the center over time. On necrotic spots, a weak yellowish coating of mycelium appears.

Mosaic - viral disease. On the leaves, a pattern is formed in the form of a grid or yellow stripes, resembling a mosaic. Plant growth slows down, shortened peduncles are formed, flowers are underdeveloped. Flower petals become variegated. The disease is spread by aphids.

Photo from the Floriculture magazine - 2001 - No. 3

If irises are affected by viruses, it is impossible to cure them. Only preventive measures are taken. good care helps to mask the symptoms of the disease, but the plants will be a source of infection for healthy ones. Timely culling of diseased specimens is necessary, as well as the fight against insects - vectors of viruses (aphids). In the photo on the left, there is a hatched mosaic on iris leaves.

Other related materials

Irises are quite unpretentious garden plants that do not hinder standard process cultivation and do not burden the grower, but some, especially refined, varieties can be like that.

Basically, problems arise with the leaves of irises - they periodically turn yellow. If we discard the natural causes of wilting of iris leaves, it remains to consider viral, bacterial and fungal, which can often appear in these flowers.

Causes of yellowing leaves in irises and what should be done?

The bacterial infection appears as bacteriosis- This is a characteristic rot on the rhizome of the iris. It softens the flower, because of which it begins to intensively lose useful material. The first wake-up call may be the appearance of a brown tint on the sheets, after which they begin to dry at the tips and turn completely yellow. From the rhizome, covered with rot, appears bad smell.

What to do in this case? Irises that can no longer be saved should be thrown away, and those that are still possible should be transplanted. Before being placed in a fresh substrate, the rhizomes are processed, the damaged areas are removed and sprinkled with ashes. If the affected area is extensive, it must be treated with a weak solution of potassium permanganate and a suspension of captan (0.5% each).

Often irises can be attacked fusarium - a special kind of rot. The reason for this is Fusarium fungi. The defeat begins with the roots, after which brown spots appear on the lower part of the stem, then they rise to the leaves, which turn yellow and die - the iris slowly dies.

What to do in this case? Fusarium is removed with the help of fungicides - these are the only drugs that can cope with this disease. Of course, the defeated sections of the rhizome are cut off, and the flowers that can no longer be saved are removed. The rot remains in the soil for a long time, so you need to process it, and then take a break for a short time before the next landing on this site.

What to do in this case? You can't get rid of the mosaic. This is a viral disease this moment not fully understood and is extremely resistant to most drugs of wide and local action. It is recommended to carry out preventive measures, both against aphids and this viral disease, in order to reduce the likelihood of infection. You also need to remove, uproot the affected plants, and transplant healthy ones to a new place so that they do not become infected.

Ascochitioh leaves in irises appears in the form brown spots on a yellow background with numerous punctate pigmentation.

What to do in this case? The disease is curable only if the irises are treated in time. Solutions such as 0.1% Bordeaux liquid, as well as a 0.2% solution of foundationazole, are suitable. Treatment is carried out until the symptoms of the disease disappear completely.