Diseases of cabbage and measures to combat them. Diseases of white cabbage and how to deal with them? How to deal with vascular bacteriosis

Who doesn't know cabbage! This taste is familiar to us since childhood. Remember how they gnawed juicy stalks when parents were pickling cabbage? And how delicious is pickled cabbage, stew, and cabbage rolls ?! You can list all the delights of cabbage in cooking for a long time. And in folk medicine, she is an assistant! And it has vitamins! Do not count all its merits at once. We'll talk about how to save your favorite and healthy vegetable from disease. Cabbage is a rather capricious plant - it needs constant care and attention. She does not like acidic soils and excessive moisture, but even without watering she is bad. We will study the main diseases of cabbage and the measures taken to combat diseases.

Kila cabbage.

One of the most common fungal diseases. Growths of various sizes form on the roots, while the number of root hairs decreases. As a result, plants cannot absorb water with nutrients in sufficient quantities, their aerial part develops poorly, heads of cabbage do not form.

Control measures.

• Liming of acidic soils;
• Crop rotation;
• The return of planting cabbage to its original place no earlier than in 3-5 years;
• Culling seedlings with diseased roots;
• Destruction of weeds, especially cruciferous;
• In autumn, mandatory burning of plant residues and deep digging of the soil;
• The soil should be disinfected with a solution of copper sulfate;
• Before planting cabbage, organic fertilizer "Deoxidizer" is added to each well (1 tablespoon each).
• When growing seedlings, you can not use the soil from the beds. When planting, the root of cabbage seedlings is dipped in a solution of the Hom preparation (40 g per 10 liters of water). Soil cultivation is also effective when planting seedlings with a solution of colloidal sulfur (40 g per 10 l of water).

Blackleg.

Fungal disease, as a result of which the root neck becomes brown or black and quickly rots. Plants wither and dry up. This disease affects seedlings of different types of cabbage.

Favorable conditions for the development of the fungus are created in acidic, abundantly watered soil, with dense plantings.

Control measures.

• Seed dressing;
• Regular airing and moderate watering of seedlings;
• Disinfection of the soil by heating in the oven at a temperature of 110 ° C for 30 minutes and spraying with a solution of "Colloidal Sulfur" (20 g of powder per 10 l of water).
• For the formation of additional roots in seedlings above the damaged part, it is necessary to pour sand in a layer of 1-2 cm over the soil surface in greenhouses.
• When a disease occurs, seedlings are watered with a solution of potassium permanganate (0.5 g per 1 liter of water) or "Colloidal sulfur" (20 g per 10 liters of water).
• Before planting on the beds, seedlings are discarded.

Downy mildew.

Fungal disease. It affects seedlings, starting with cotyledon leaves. Small yellowish oily spots with a grayish powdery coating appear on the leaves. The development of this disease is facilitated by high humidity of the air and soil, as well as watering with cold water. Usually, the disease stops after planting diseased seedlings in open ground.

Control measures.

• Before sowing, the seeds are dipped in hot water (50 ° C) for 20 minutes, then quickly cooled in cold water for 1-2 minutes;
• If there are signs of this disease, the seedlings are sprayed with a solution of colloidal sulfur (20 g per 10 liters of water). Consumption: 1 liter of solution per 10 m 2 . The treatment is repeated 20 days after planting seedlings in a permanent place.
• Then the cabbage is sprayed with a Topaz solution: 1 ampoule per 10 liters of water.

Spot necrosis of cabbage (mosaic).

Non-infectious disease, not transmitted by seeds. It appears on the inner leaves of the head in the form of small black spots at the end of the growing season and during storage. The disease is aggravated by improper storage (violation of storage temperature, air exchange, humidity). Optimal conditions for storing cabbage at a temperature (+1 ... + 3 ° C), with relative humidity (90-95%), subject to good air exchange (ventilation). If the storage regime is violated, lead-gray or black spots increase in size, covering large areas of the leaves. Point necrosis does not affect the taste of the head of cabbage, but the appearance is lost. You can cut out black dots and still eat cabbage. During the growing season, the disease appears when high doses of nitrogen fertilizers are applied.

Control measures.

• Use necrosis-resistant seeds;
• Regulate the doses of fertilizers (nitrogen);
• Top dressing of plants in the second half of the growing season with potash fertilizers or ash;
• Liming (deoxidation) of acidic soils;
• Compliance with agrotechnical measures;
• Observe the optimal storage mode;
• During storage, monitor the condition of heads of cabbage, if affected heads are found, isolate them and treat the storage sites with a solution of potassium permanganate (wipe with a cloth soaked in this solution).

Mucous bacteriosis.

Or bacterial (wet) rot of cabbage. This is a bacterial disease. It affects cabbage when tying heads. Leaves and heads turn yellow, become slimy, emit an unpleasant smell of rot. Heads of cabbage fall down before ripening.

Control measures.

• Observe agricultural practices and combat cabbage fly and other pests that spread putrefactive bacteria;
• During growth, cabbage is watered with solutions of potassium permanganate, Barrier preparations (3 caps per 1 liter of water) or Barrier (5 tablespoons per 10 liters of water) and pollinated with ash.

Fungal disease. Mostly known in the northern regions of the Non-Chernozem region. Appears at any stage of development. When seedlings are affected, the stem at the base turns gray, becomes rotten and dries out, covered with black dots. The lower leaves change in color, become bluish or purple, the stem is bent. In adult plants, dry spots appear on the stalks (depressed, with black dots). Such cabbage will not be stored. Spores of the fungus are stored on seeds, leaves, stalks, plant debris.

Control measures.

• Compliance with crop rotation;
• Soil treatment and disinfection;
• Removal and destruction of plant residues;
• Plant nutrition with potassium nitrate (1.5-2 tablespoons per 10 liters of water) or wood ash;
• Spraying plants (in case of damage) with a 1% solution of Bordeaux liquid (100 ml per 10 l of water) or copper oxychloride (40-50 g per 10 l of water);
• For prevention, a solution of potassium permanganate (10 g per 10 liters of water), water the plants;
• Maintaining the cleanliness of plantings (removing weeds, pest control);
• It is not recommended to plant infected seedlings;
• Warming up the seeds in hot water for 20 minutes (about 50 ° C is not higher), followed by placing them in cold water for 2-3 minutes. Then you need to dry to flowability;

Black rot (vascular bacteriosis).

With vascular bacteriosis, the tips of the leaves turn yellow and wither. A net with blackened vessels appears on the leaves. Sick seedlings, as a rule, develop poorly, look sluggish, heads of such plants are not formed. On mature plants, the lower leaves fall off, the disease progresses to the upper leaves, black mesh may appear on any part of the leaf blade. Plants are stunted in growth and heads are formed poorly, become smaller.

Control measures.

• selection of seeds resistant to the disease;
• seed dressing;
• soil disinfection before planting;
• observe the cleanliness of plantings ((weed control (especially cruciferous), pests));
• compliance with crop rotation;
• cleaning and destruction of plant residues;
• deep digging of the soil;
• at the first sign of the disease, remove diseased plants;
• shed seedlings with a solution of potassium permanganate (3 g per 10 l of water);
• during plant growth, treatment with Zaslon or Barrier preparations or others.

White (sclerocyniosis), gray (botritiosis) rot.

They usually appear during storage of cabbage. The leaves of the head of cabbage are covered with a cotton-like mucous coating with black sclerotia and rot. The disease is rapidly transmitted from plant to plant at high indoor temperatures.

During the growth period, white rot manifests itself in the defeat of the lower leaves and root neck. Affected tissues become watery, discolored and covered with a cotton-like mucous coating. Gray rot usually appears at the end of the growing season, affects the leaves of the head, is transmitted through the air and with plant debris.

Control measures.

• Decontamination of seeds before sowing by heating in hot water helps to prevent the appearance of rot;
• It is necessary to store only storable varieties, the temperature in the storage should be maintained within (1-3 ° C);
• It is recommended to pollinate heads of cabbage with chalk (1 kg of chalk per 50 kg of cabbage);
• To carry out disinfection of the storage before laying the crop;
• Harvesting timely;
• Make a bookmark for storage from whole (without damage) heads of cabbage.

Great( 0 ) Badly( 0 )

Pathogen: Fusarium oxysporum f.sp. conglutinans (Wr.) Sn. et Hans.

Maliciousness. Fusarium wilt of cabbage, or it is often called yellowness, is most often found in the southern regions. Can do great harm. Seedlings and only plants planted in the field are affected, the death of which can sometimes reach 20-25%. The disease is most dangerous in hot and dry years; under these conditions, the disease can lead to mass death of cabbage plants.

Fusarium wilt symptoms

Symptoms of damage are easily noticeable: the leaves turn yellow and plant turgor is lost. Chlorosis is observed between the veins of the lower leaves, as a result of which the plants fade over time. As a result of the cessation of growth of the chlorotic part, uneven development of the leaf blade is observed. A unilateral lesion can be observed in the entire head of cabbage. The disease leads to leaf fall, and with a strong lesion, only a small naked head of cabbage remains. If you make a transverse cut of the stem or petiole of the leaves, you can see a ring of vessels that have a brown-brown color (Fig. 2). Over time, Fusarium spreads up the plant.

One-sided yellowing of the leaves is often observed. If proper protection measures are not taken, plants die prematurely.

Outwardly, the manifestation of Fusarium may be similar to the manifestations of such diseases as or vascular bacteriosis of cabbage.

Fig.2. Cross section of a cabbage stem affected by Fusarium photo

Biology of the Cauliflower Fusarium Wilt Pathogen

Fusarium cabbage penetrates the plant through the roots and affects the vascular system. After penetration, it spreads through the vessels to the aerial part and prevents the movement of water in the plant.

Favorable conditions for the development of Fusarium cabbage in the first half of the growing season are hot and dry weather, the optimum soil temperature for plant infection is 15-17 ° C. However, temperature and humidity are not the main factors that can affect the infectious process.

The host plant can be any member of the Cabbage family.

The causative agent is preserved chlamydospores in the soil, which remain viable for several years.

Protective measures against Fusarium wilt of cabbage

• Affected plants are immediately dug up along with the roots and destroyed. In greenhouses, when Fusarium cabbage is detected, the soil is disinfected, or its complete replacement is carried out.
• The infectious background decreases with crop rotation.
• Cultivation of resistant and tolerant cabbage hybrids is the basis of protective measures against this disease (table).
• If foci of the disease occur in the autumn in nurseries, it is effective to disinfect the soil using a solution of copper sulphate with a rate of use of 5 g of the drug per 10 liters of water.
• To increase the resistance of plants to Fusarium cabbage, plants are sprayed with Agat-25, Immunocytophyt, etc.

On infected fields, it is advisable to cultivate Fusarium-resistant varieties and hybrids of other cabbage varieties:

hybridsF1 cabbage resistant to fusarium

Alternariosis (black spot of cabbage)
Symptoms of cabbage black spot: the disease manifests itself in the form of small brown and necrotic spots with dead tissue on various parts of plants. The disease is especially dangerous for cabbage testes.
With the development of black spotting (alternariosis), concentric brown spots appear on the affected tissues with a dark coating of fungal spores.

The causative fungus overwinters on plant debris and on seeds.
The spread of the disease is facilitated by damage to cabbage by various pests (secret proboscis).

Measures to combat black spot (alternariosis) of cabbages: it is necessary to warm the cabbage seeds before sowing in water at a temperature of +50C for 20 minutes, followed by cooling and drying.
It is necessary to follow the rules of agricultural technology and cultivation of cabbage (planting density, watering, etc.).

It is necessary to remove all weeds, even between rows, to deal with aphids in a timely manner (spray with insecticides).

You can choose varieties of cabbage that are resistant to black spot.
Black spot (alternariosis) of cabbage is spread by seeds.

white rot

white rot

Symptoms of white rot: on different types of plants, signs of the disease can manifest themselves in different ways. It can be rotting of a head of cabbage, cobweb raids on the underside of the leaves, white bloom on root crops, rotting of the onion bottom ...

Often the disease is common in storage.
The source of white rot can be infected soil.
White rot affects almost all types of vegetables and many weeds. The disease is especially pronounced on lettuce, parsley, cucumber, carrots, horseradish, cabbage, peppers, beans, onions, sunflowers.

The disease is more severe on acidic, nitrogen-rich soils and in cool weather. Measures to combat white rot: you can spray the affected tomatoes, potatoes, peppers and other plants with copper-containing preparations.

white rot

Plant debris must be removed from the garden. It is important to follow the rules of crop rotation when growing vegetables. It is necessary to ensure that crops that are often and severely affected by white rot are not grown in the same place.

Weeds need to be controlled in the area.
Against white rot, carrots are powdered with chalk before being stored. At the same time, you need to store only healthy root crops without damage.
It is important to observe the storage conditions of root crops: temperature 0-+2 ° C, air humidity - 90-95%.

Greenhouses and greenhouses must be disinfected.
It is advisable to inspect the plants regularly (every 10 days).
Increased ventilation helps to reduce the spread of white rot.
The development of white rot is facilitated by the introduction of an excess amount of nitrogen fertilizers.

Belle cabbage crops.

Belle cabbage crops. Belle is a common disease of cabbage, horseradish, radish and many weeds. Leaves, stems, pedicels and testicles affected by the disease seem to be covered with white oil paint.
With the development of the disease, the tissues turn brown and dry.

Clusters of spores form on the leaves, from which they are bent and covered with swellings.
Linen control measures: with a strong development of the disease, the plants are sprayed with copper-containing preparations.

All plant debris must be removed from the garden in a timely manner.
You need to regularly deal with weeds, diseases.
It is important to follow the rules of crop rotation.

Kila cabbage.

Kila cabbage.

Symptoms of cabbage clubroot: spherical or spindle-shaped growths form on the roots of affected plants, which in the initial stage of the disease have the same color as the roots, and then turn brown and rot.
Plants affected by clubroot are stunted, depressed, and often wither. Cabbage heads or root crops are underdeveloped.

Kila is a common fungal disease of cabbage (all kinds), radishes, radishes and many weeds. Most often, the keel is observed in low areas with stagnant water.
Kila affects the roots of seedlings and adult plants, especially the harmfulness increases with a lack of moisture.

Measures to combat clubroot cabbage: it is necessary to regularly remove weeds, even from row spacing.
Plants in acidic soil are especially susceptible to keel.

It is important to follow the rules of crop rotation when growing cabbage (cabbage cannot be returned to its original garden earlier than after 3 years). You can choose varieties of cabbage that are resistant to keel. The disease is spread by spores of the pathogen fungus through manure or soil, where the spores remain viable for up to several years.

Downy mildew of cabbage

Downy mildew of cabbage (downy mildew). Symptoms of downy mildew of cabbage: yellowish spots appear on the leaves of young plants. A whitish coating is visible on the underside of the leaf.

On older (lower) leaves of white cabbage, the spots are reddish-yellow.
Powdery mildew is especially harmful to young plants in greenhouses and to plants at the end of the growing season.
Downy mildew infects all types of cabbage - Brussels sprouts, white cabbage, Savoy cabbage, leafy cabbage, kohlrabi, as well as swede, mustard and some weeds.
Measures to combat downy mildew of cabbage: it is advisable to disinfect the seeds before planting by soaking them in water at a temperature of +50 ° C for 20 minutes or subjecting them to another treatment.

At the first signs of the disease, seedlings are pollinated 3 times with ground sulfur and its planting is accelerated to a permanent place. Before planting, cabbage seedlings can be fed with ammonium nitrate.

At the first signs of the disease, cabbage seed plants are sprayed with copper-containing preparations.
Sick plants should be removed promptly.
Downy mildew is spread by spores of the pathogen fungus through infected seeds.

cabbage mosaic

Cabbage mosaic.
Symptoms of cabbage mosaic: the first signs appear on young leaves in the form of an inconspicuous interveinal mosaic. The veins can be bent and the leaves are then deformed.

With the development of the disease, a dark green border appears on the cabbage leaves, first near the main veins, then on the rest of the leaf. The tissue between the veins is gradually covered with light necrotic spots.

At air temperatures above +25 C, signs of the disease temporarily do not appear. The mosaic affects all types of cabbage - Brussels sprouts, white cabbages, Savoy cabbages, leafy cabbages, kohlrabi, as well as many other plants from the cabbage family (horseradish, radish, radish, turnip, swede).

Measures to combat cabbage mosaic: viral diseases are practically not subject to treatment. Losses are especially great when cabbage seedlings are affected in the early stages. Diseased plants with mosaic symptoms should be removed immediately.

The remains of cabbage plants need to be plowed deep (to a depth of 50 cm).

Vascular bacteriosis

Vascular bacteriosis of cabbage

Symptoms of vascular bacteriosis of cabbage: the first signs of the disease appear on the edges of the leaves. The leaf tissue turns yellow, becomes "parchment", the veins turn black.
Young plants affected by vascular bacteriosis die prematurely. Older plants develop unevenly.
Bacteriosis affects all types of cabbage, especially white, cauliflower, Savoy and kohlrabi, mustard, turnips, rutabaga and other cabbage plants.

Measures to combat bacteriosis of cabbage: keeping seeds in water at a temperature of +50°C for 20 minutes is effective. After that, the seeds are cooled (3 minutes) and dried to flowability.
Seeds should be taken only from healthy plants. In any case, it is better to pre-process them.
Plant debris must be removed from the garden.

It is important to follow the rules of crop rotation when growing cabbage (cabbage cannot be returned to its original garden earlier than after 3 years).
You can choose varieties of cabbage that are resistant to vascular bacteriosis.
The disease spreads by seeds, plant debris, rain, wind.

Dry rot

Dry rot of cabbage crops (phoma).
Symptoms of phomosis of cabbage: in seedlings, the disease affects the cotyledon leaves, stems, roots. Pale spots with black dots appear on the cotyledon leaves.

Phomosis on the stem resembles the symptoms of a black leg of cabbage, but the affected tissue is yellowish-gray in color with black specks. Light brown spots with a dark border appear on the leaves and stalks of cabbage. The lower leaves turn bluish or purple. The leaves of the head may fall off.

Plants affected by phomosis slow down growth, turn pale, the lower leaves acquire a pinkish or bluish tint.
With the development of the disease, the affected tissues are destroyed and dry rot is formed.

Seeds on Phoma-affected plants are already infected.
Phomosis affects all types of cabbage: white, kohlrabi, Brussels sprouts, cauliflower, Peking, fomosavoy cabbage rot, broccoli.

Phomosis (dry rot) of diseased seedlings, seeds and plant debris spreads. The disease is especially widespread in wet years.

Measures to combat cabbage phomosis: it is necessary to remove all plant residues from the garden in a timely manner. It is important to follow the rules of crop rotation. It is advisable to treat cabbage seeds before sowing with a solution of tigam (0.5%).

The development of the disease is facilitated by mechanical damage to the cabbage by aphids and leaf-eating pests, so it is important to fight the cabbage fly and other insects. The same control measures are effective as against downy mildew of cabbage. The infection persists in the soil for up to 7 years.

Fusarium wilt

Fusarium wilt (Tracheomycosis)

Symptoms of Fusarium wilt: on affected tomatoes, the disease manifests itself in the yellowing of the lower leaves, then the wilt rises up the stem. On the transverse section of the stem, the brown color of the vascular ring is visible.

Fusarium-affected cabbage leaves become yellow-green, sluggish. Sometimes only one side of the leaf can turn yellow. The leaf blade develops unevenly, which leads to deformation of the cabbage leaf. If you look at the affected leaf in the light, black veinlets of the leaf will be visible. Diseased leaves fall off.

On onions with Fusarium, rot of the tissues of the lower part of the bulb begins, which then spreads to the entire bulb, the roots die off. In this case, the onion feather turns yellow and dies.

The disease causes wilting of cucumber, tomato, cabbage, pepper, onion and other vegetable crops. Measures to combat Fusarium wilt (tracheomycosis): it is necessary to follow the rules of agricultural technology and the cultivation of vegetable plants. Sick plants should be removed in a timely manner (you need to inspect the beds every 10 days). It is important to follow the rules of crop rotation.

Black ring spot of cabbage

Black ring spot of cabbage.

Symptoms of cabbage black ring spot: the first signs appear on individual parts of the plant, then affecting the entire cabbage. First, numerous black spots and stripes appear between the veins of cabbage leaves.

With the development of the disease, light green spots appear on the leaves of white cabbage, turning into necrotic black-brown rings. Necrotic spots seem to be pressed into the leaf tissue and surrounded by necrotic spots.

Brussels sprouts develop light green blisters and leaf curls that develop poorly.
Cauliflower and Savoy cabbage develop yellowish spots or stripes on the leaves, sometimes there are small swellings.

Spotting affects all types of cabbage - Brussels sprouts, white cabbages, Savoy cabbages, leafy cabbages, kohlrabi, as well as many other black spots on the leaves of cabbage asthenia from the cruciferous, nightshade and haze family.

Measures to combat black ring spot of cabbage: viral diseases are practically not subject to treatment. Losses are especially great when cabbage seedlings are affected in the early stages. Sick plants showing symptoms of black spot should be removed immediately.

It is not recommended to arrange beds with cabbage in the neighborhood of collective farm fields where plants of the cruciferous family are grown.
It is necessary to remove all weeds, even between rows, to deal with aphids in a timely manner (spray with insecticides).

The remains of plant-spotted cabbage leaves should be deeply plowed (to a depth of 50 cm).
Cause of disease: Viral disease of cabbage.
Viruses spread with the juice of diseased plants, sucking insects (aphids), herbivorous mites.

Blackleg

Blackleg.
Symptoms of the black leg: the tissue of the root collar of the sprout softens, turns black, the stalk becomes thinner and eventually falls down.
Blackleg is a common disease of seed sprouts and seedlings of all types of cabbage, radish, cucumber, tomato, lettuce and many other plants.

Measures to combat the black leg: it is very important to properly care for seedlings. Too dense crops, elevated temperatures, excessive watering, lack of ventilation are not allowed.

Timely picking of seedlings and planting seedlings are important.
3 days before planting seedlings, the soil in the beds or in greenhouses is watered with a solution of colloidal sulfur (40 g per 10 l of water).
Before planting seedlings, the soil in the greenhouse is watered with a hot solution of potassium permanganate (1.5 g per 5 liters of water to treat 1 m² of beds). They also prepare the soil for seedlings.

When growing seedlings, it is watered with potassium permanganate (3-5 g per 10 liters of water). River sand or a mixture of sand + ash is poured to the stems of plants with a layer of 2 cm.
You can try to save large good seedlings affected by the black leg by cutting the stem above the damage site. The resulting cuttings are placed in water (it is possible with the addition of root formers) until new roots are obtained.

Greetings, dear friends, on the blog website! And today we will continue our acquaintance with cabbage diseases - the topic, of course, is not very pleasant for all of us, but there is no getting away from it. You are already familiar. And in this article we will consider such sores as cabbage fusarium, cabbage peronosporosis (downy mildew) and cabbage alternariosis (black spot).

Fusarium wilt, or fusarium wilt (yellowness of cabbage) is a fungal disease, the fungus enters the plant through roots or damage, spreads through the vessels of the plant, making it difficult for water to move. First of all, seedlings are affected. The sprout loses turgor, diseased leaves fall off. The leaves of the plant acquire a yellow-green color, developing stronger in the green part and weaker in the yellow. On the transverse section of the stem and cuttings, a brown ring of vessels is noticeable. Sometimes the top of the head wilts, and later rot appears. The head of cabbage is exposed and twisted.

Control measures . Affected plants are dug up and destroyed. It is also advisable to steam the soil, disinfect the soil with a solution

copper sulphate (5 g of the drug per 10 liters of water).

Cabbage peronosporosis (downy mildew) is also a disease caused by fungal spores. It affects the plant at the seedling stage. Yellowish, as if oily spots appear on cabbage leaves (starting with cotyledons), on the reverse side of which a gray powdery coating forms. Infected leaves turn yellow and die. When transplanting seedlings into open ground, the course of the disease stops, but under favorable conditions (high humidity, excessive watering, temperature 20-22 degrees) it can resume.

Control measures . Disinfection of soil and seeds before planting. Do not water with cold water. If cabbage is affected by peronosporosis, you can spray the seedlings with a suitable preparation, for example, a solution of the same copper sulphate, adding a tablespoon of liquid soap (preferably tar). To prevent the disease from returning to the beds, the treatment is repeated 20 days after planting the seedlings in a permanent place.

Alternariosis of cabbage(black spot). The causative agent of this cabbage disease is the fungus Alternaria brassicae (Berk.) Sacc. It affects cabbage plants of the first and second years, but is most harmful on testes. Due to severe infestation, seed germination in some years decreases by 30% or more. On, and other crops, alternariosis is less harmful.

The development of alternariosis is facilitated by heavy rainfall during the period of seed ripening and seed harvesting, dense plantings and high temperatures. The optimal conditions for the causative agent of the disease are formed at a temperature of 20-25 degrees and a relative humidity of 80-100%.

Symptoms are manifested as follows: a dark, sooty-colored plaque forms on the surface of the affected tissue. On head cabbage of the first year, Alternariosis appears as zonal, dark spots on the lower and covering leaves, on cauliflower - in the form of brown rot of the heads. However, in this case, the disease does not bring significant harm.

Control measures . For pre-sowing disinfection of seeds, warming in hot water (at a temperature of 50 degrees for 20 minutes) is recommended, followed by cooling in cold water and drying. Seed plants should be as far away from the culture of the first year as possible. Starting from the early spring period, dying leaves should be periodically removed from the testes and timely protection from pests should be carried out.

Chemical means of combating cabbage alternariosis are the same as with downy mildew. In autumn, it is necessary to carefully destroy post-harvest residues, to carry out autumn plowing of the soil.

Take preventive measures, that is, at least once every 2-3 weeks, water the plants (and not only cabbage, but all vegetable crops) with a 0.1% solution of copper sulphate (or any other preparation containing copper). But do not forget that processed plants should not be eaten after this for at least 20 days.

Fusarium, peronosporosis and cabbage alternaria, unfortunately, do not end the list of diseases that this wonderful culture can affect, and we will continue the conversation on this topic.

And I wish you that your plants do not get sick with any sores and give wonderful harvests! See you soon!

Sincerely, Andrey!

Enter your e-mail and receive new articles by mail:

Able to spoil your crop a lot. And if you sit idly by - and completely destroy. Therefore, it is extremely important to know the main diseases that cabbage and its seedlings are susceptible to. In this article, we will learn what cabbage diseases are and how to treat them.

Downy mildew of cabbage

Why is downy mildew dangerous?

Such a cabbage disease, like downy mildew, often affects cabbage at a young age. Spots of yellow and gray color with bloom appear on the leaves. With a large-scale defeat of cabbage seedlings with downy mildew, the leaves begin to die off over time, the plant lags behind in development and may even die.

Note that favorable conditions for the development of this disease is excessive humidity.

How to deal with downy mildew?

Since this cabbage disease able to hit the plant at any stage of development, it is necessary, if possible, to ventilate. The culture can be sprayed with one percent Bordeaux liquid (for 10 liters of water - about half a liter of liquid). If you decide to treat seedlings, reduce the concentration by half.

black leg of cabbage

Why is the black leg dangerous?

The black leg is a fungus that settles on the base of the cabbage stem and root neck. Most often, the black leg affects cabbage, which is grown in conditions of high humidity and insufficient ventilation. This disease makes the cabbage stalk thin, black and rotten. At best, the plant will lag behind in development, at worst (and most likely) it will die.

If the symptoms of this cabbage disease are still noticeable in seedlings, do not plant it in the soil: caring for this cabbage will not bring results.

How to deal with black leg?

In the fight against this disease, prevention is of great importance. As with downy mildew, ventilate and control the humidity in the growing area.

In no case do not plant young cabbage in the place where cabbage with a black leg previously “lived”. Seeds before planting should be treated with granosan at the rate of 0.4 grams per 0.1 kg of cabbage seeds. A special preparation called TMTD (50%) will also help - it should be applied to the soil before planting seeds (50 grams per 1 "square").

Kila cabbage

Why is cabbage keel dangerous?

Kila is a very common cabbage disease. She settles in the root system of this culture. The most susceptible to keel disease are early and cauliflower.

This disease is noticeable even at the seedling stage: outgrowths appear on the roots of the plant, disrupting the nutrition of the plant. Often, because of the keel, the cabbage cannot even form an ovary. When the growing season is over, these growths decompose due to decay and enter the soil, thereby infecting it.

How to deal with clubroot cabbage?

The most important thing here is to notice deviations from the norm in time and understand that this is exactly the keel. Withered or dead plants from this cabbage disease are removed from the garden, and the place is well sprinkled with lime. By the way, at the time of planting cabbage seedlings for prevention, you can lime the soil.

Note that for other cultures this cabbage disease not dangerous as it affects only cruciferous plants.

Vascular bacteriosis of cabbage

Why is vascular bacteriosis dangerous?

This cabbage disease affects the edges of the leaves: they turn yellow, become "parchment", the veins turn black and eventually the leaf dies.

How to deal with vascular bacteriosis?

There are very effective drugs - trichomedrin, planriz. For prevention, you should warm the seeds before planting in hot water at a temperature of 50 degrees for about 20 minutes, then cool and dry.

cabbage mosaic

Why is cabbage mosaic dangerous?

Inconspicuous spots between the veins begin to appear on the leaves. Then the leaves begin to deform. If no measures are taken, after the dark green border, the leaves begin to completely become covered with necrotic spots.

How to deal with cabbage mosaic?

Cabbage mosaic is a viral disease, and they are very poorly treated. Plants affected by this disease should be removed immediately. You also need to get rid of weeds in the aisles and pests.

White rot of cabbage

Why is white rot of cabbage dangerous?

Symptoms of this cabbage disease are rotting of the head and the appearance of cobweb raids on the back of the leaves. Most often, cabbage becomes infected from already diseased soil. White rot loves cool weather, lots of nitrogen and high acidity.

How to deal with white rot of cabbage?

It gives a good result by spraying cabbage leaves with preparations containing copper, as well as liming the soil before planting cabbage.

Tatyana Kuzmenko, member of the editorial board of the Sobcorrespondent of the online publication "AtmAgro. Agroindustrial Bulletin"