Fighting the black leg of cabbage

The black leg of cabbage is often found when growing cruciferous varieties. Most often, it appears in cabbage seedlings, but it can also be in seedlings that have already been transplanted into soil. Its danger lies in the fact that it becomes a cause of depletion and subsequent death of plants.

Fight against the black cabbage leg

Description and contributing factors

Black cabbage leg – fungal infe . Tion of its pathogen spores remain active, being in the soil ground Under favorable conditions, they begin to actively reproduce

Persist fungal infection may be one of three types:.. Cysts sclerotia or oospores.

Contributing factors

Factors contributing to the reproduction and spread of the black leg in cabbage plantings:

• crop failure;
• excessive soil moisture,
• damp weather,
• increased soil acidity and its supersaturation with nitrogen-containing mineral complexes,
• lack of proper soil looseness, creating soil crust, which does not give oxygen access to the root system,
• thickened plantings and excessive watering.

Among cabbage varieties, the most susceptible fungal infections, secrete Slava and No. 1.

Signs of the disease

The black leg of cabbage can appear at different stages of cruciferous cultivation:

• at the early stage of seed germination in seedlings with cotyledons or 2-3 real leaves,
• at the stage of transplanting seedlings into soil.

In the first case, young seedlings are observed watery structure of the basal part. Subsequently, this part begins to decay, and as a result, still immature sprouts fall to the ground and die.

The blacktail quickly spreads, affecting neighboring healthy seedlings, causing mass death of plantings.

In the second case, when transplanting healthy seedlings, cabbage is infected with a black leg in the form of a thinning of the root neck and its blackening.The leg dries, the plants begin to lag behind in development and growth, however, they do not die and can even reach the stage of formation of cabbage heads. When a bed is damaged, usually the head of the head and foliage begin to rot, mushroom sclerotia appears and the cabbage leaves become dry.

Preventive measures

To prevent over-watering, do not allow excessive waterlogging of the earth, excess acidity, thickened plantings, irregular loosening of the soil. Additional preventive measures against cabbage black centrifuge can also be applied.

Earth

The soil must be decontaminated

The land from the cottage area used for planting seeds must be calcined in the oven before planting. An effective preventive measure is also its disinfection with formalin or manganese solutions.

When mass seeds are planted in a greenhouse or on open beds, preliminary ash is applied to the soil to control the level of acidity and colloidal sulfur for disinfection. The standard for wood ash is 100g per 1 sq.m of sown area. The standard for introducing sulfur is 5-8gr per 1 sq. Meter of plantings.

Seed

In addition to cultivating the land, preventive measures are being taken for the seed.Among the preparations protecting the cabbage from the black leg:

• Planriz with a concentration of 1%, they treat the seeds 1 day before sowing;
• Fitosporin, 4 drops per 200 ml of water, in it soak the seeds for 2 hours before sowing.

Seedlings

At the seedling growing stage, cabbage can also be protected from the appearance of a black leg on it. This can be done using biological and chemical agents.

Biological agents

The biological agents that can provide effective protection of cabbage seedlings against the disease include:

• spraying liquid Fitosporin-M;
• treatment of the roots of seedlings at the stage of transplantation in a mixture of mullein (5 kg), clay (1 kg), diluted with water (10 l);
• powder of cabbage roots with ash powder or river sand.

Chemicals

Among the main chemicals that can prevent the defeat of cabbage ra black leg abrasions, emit:

• preparations containing sulfur, consumption – 50g per 1 sq.m of planted area;
• slightly concentrated solutions of Hom, Metaxil, copper and iron sulfate preparations.

Fight against the black leg

When fixing signs of the presence of a black centipede on cabbage, emergency measures must be taken to combat the disease.

Agriculture

First of all, you need to remove the affected plants and destroy them. Earth from empty holes is removed and disinfected.The remaining healthy plantings are thinned out, the earth is loosening.

With subsequent care, plants regularly swell and ash powder and river sand sprinkle under the roots.

Biological agents and chemical preparations

Emergency treatment of the disease can be carried out using biological agents and chemical drugs:

• phytosporin powder, diluted 6g per 10l of water,
• Bordeaux liquid with a concentration of 1%,
• baking or soda ash,
• a solution of potassium permanganate with a concentration of 0.5%,
• Previkur Energy concentrate, diluted in an amount of 20-25ml in 10l of water,
• trichodermin, diluted 100ml in 10l of water.

All these solutions are used for spraying cabbage x-sheet.