Diseases of white cabbage seedlings and their control

Diseases of cabbage seedlings often develop due to improper care. The spread of fungal and bacterial infections is facilitated by high humidity, lack of ventilation. Another factor is contamination through the soil. Therefore, the soil, like seeds, is recommended to be disinfected before planting. A description of the main diseases with signs and methods of treatment is presented in the article.

Description and treatment of cabbage seedling diseases

Seedlings can suffer from various diseases, most of which are infectious in nature. So that the seedlings do not become infected from each other, it is recommended to inspect the seedlings daily and, if necessary, immediately process or remove the affected plant. The main pathologies, external signs and methods of treatment are described below.

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Kila is a very dangerous disease of cabbage seedlings, which has an infectious nature. The causative agent is a fungus that spreads through the soil and weeds from the same family (cruciferous). It is dangerous when growing seedlings both at home and in greenhouses.

The main signs of damage:

• growths appear on the roots;
• leaves turn yellow, wither;
• developmental delay.

Kila is an incurable disease of cabbage seedlings – there is not a single remedy that would give a satisfactory result. Therefore, the affected seedlings are thrown away, and the soil is disinfected with a solution of potassium permanganate 1 g per 1 liter.

Cabbage root affected by clubroot

As a preventive measure, the following measures should be observed:

• process the leaves with “Fitosporin”;
• dress the soil in “Fundazol” before sowing seeds;
• soak the seeds in the preparation “Prestige” or “Thiovit Jet”.

Therefore, it is necessary to monitor the rate of watering seedlings, and if the soil is acidic, first put a pinch of wood ash or dolomite flour into it.

Blackleg

This is a disease of cabbage seedlings, which also affects other cruciferous plants (radish, radish). It is associated with several different types of microscopic fungi that spread through the root system. Pathogens live in the soil, penetrate through seeds and uncleaned plant debris. Like many other infections, this seedling disease develops rapidly in conditions of high humidity and heat.

The main symptoms of the disease:

• blackening of the root neck;
• leaves become sluggish;
• the tips of the leaf plates turn yellow;
• plants lag behind in development, they can recover overnight, but then fade again.

The black leg is incurable, so the affected seedlings are taken out along with a clod of earth around the root and thrown away. Then the soil is watered with potassium permanganate and bacterial fertilizer is applied.

cabbage mosaic

This is an infectious viral disease of cabbage seedlings, which also cannot be treated. The main features are:

• the appearance of a dark green stripe next to the veins;
• mosaic coloring with yellow patches;
• the upper foliage is most often affected;
• deformation of sheet plates;
• developmental delay.

This pathology is observed during a period of severe drought, when water is clearly not enough. Therefore, it is necessary to monitor watering, temperature and lighting levels. But since the seedlings cannot be cured, they can only be thrown away and the soil disinfected.

Downy Mildew

This seedling disease is also called downy mildew. It is a fungal infection that affects both seedlings and adult seedlings. The main signs are:

• foliage is pale yellow;
• spots with blurry edges form on it;
• a white coating is noticeable on the surface (the layer is small and loose);
• plants begin to rot and die.

Cabbage leaf affected by downy mildew

For treatment, seedlings are isolated and treated with fungicides:

• Bordeaux liquid;
• “RAW”;
• “Abiga Peak”;
• “Ridomil Gold”;
• “Quadris”.

It is also necessary to reduce the level of humidity, reduce watering and regularly remove the film for ventilation.

Vascular bacteriosis

This is a bacterial infection that leads to the development of a dangerous disease of cabbage seedlings. It develops especially quickly with excess moisture and too high a temperature. Can affect all types of plants.

Main features:

• cabbage leaves turn yellow at the edges;
• then they are covered with yellow spots and in the middle;
• the veins become dark;
• on the cut, the stems (and in adult plants and the stalk) darken.

For treatment, antibiotic treatment is carried out, for example, Kazumin or Metronidazole. These tools are quite effective, but they also destroy the beneficial microflora of the soil. Therefore, after spraying, it is necessary to apply bacterial fertilizer.

Fusarium wilt

This seedling disease is also called jaundice or simply fusarium. It has an infectious nature, the causative agent is pathogenic fungi. It affects seedlings of white cabbage, cauliflower, broccoli and other varieties.

The main symptom is yellowing of the foliage. If you cut the petiole, you can see brown rings on it. For treatment, all affected seedlings are isolated and 1-2 sprays with a fungicide are carried out:

• “Tatu”;
• “Score”;
• Fundazol;
• “Maksim”.

preventive measures

It is not always easy to treat diseases of cabbage seedlings, moreover, some of them cannot be eliminated. Therefore, it is recommended to follow certain preventive measures that will help keep the seedlings healthy and get a good harvest. First of all, varieties and hybrids of cabbage that are resistant to diseases and pests should be used:

• Bronco F1;
• Dithmarscher;
• Yamori F1;
• Kilastor F1;
• Atria F1;
• Dobrovodskaya;
• A gift;
• Krautman F1;
• Megaton F1;
• They bought;
• Aggressor F1;
• Dream;
• Amager 611;
• Kolobok F1 and others.

Dobrovodskaya – one of the many varieties of cabbage that is resistant to diseases

Also, for the prevention of seedling diseases, it is recommended to follow other rules:

1. Treat the seeds before planting with a solution of potassium permanganate 1 g per 1 liter or a fungicide (according to instructions).
2. Etch the soil with a similar composition, rinse the containers. After disinfection, it is recommended to apply a bacterial fertilizer, for example, Rizotorfin.
3. Do not allow too dense planting of seedlings, if necessary, thin out seedlings, leaving 5 cm between them, and then dive into separate containers.
4. In the fall, remove all plant debris and burn or throw away away from the site. They should not be used as mulch or for laying in a compost pit.
5. When grown in a greenhouse in autumn, treat surfaces with potassium permanganate or a fungicide.
6. Monitor watering, avoiding waterlogging of the soil. At the first stage of cultivation, regularly remove the film for ventilation. After the mass emergence of seedlings, remove it and continue to monitor the uniform moistening of the soil.

Conclusion

Diseases of cabbage seedlings develop quite quickly, as the seedlings are grown in high humidity conditions. To prevent infection, it is necessary to treat the seeds and soil, as well as monitor the level of watering. When growing, you should choose varieties and hybrids with good immunity. For prevention, even healthy seedlings after transplanting into the ground are recommended to be treated with a fungicide.