Why cabbage leaves turn red: reasons for what to do to prevent

Not always, if the foliage turns red or changes its color to a different shade, this is a sign of damage to the crop by diseases or the appearance of pests on the cabbage, so you need to understand why this is happening.

Causes of redness of cabbage leaves

To grow and develop normally, a crop needs macronutrients (nitrogen) and micronutrients (calcium, magnesium, iron, molybdenum, copper). Lack of one or more nutrients always affects plants. For example, with a lack of phosphorus in the ground, reddening of the leaves is observed.

Why did the cabbage leaves turn red when the weather is cool, cloudy, rainy?

Metabolism occurs normally when the air temperature drops, but the roots do not have time to absorb useful elements, especially phosphorus from the ground. When it rains, phosphorus leaves the soil surface much deeper, and a plant whose roots are located close to the surface cannot reach it.

It is required to fertilize plants with phosphorus. Scatter 2 tbsp per 1 m². spoons of superphosphate or 1 teaspoon of diammonium phosphate. You can sprinkle 1 tbsp. a spoonful of potassium monophosphate per 1 m², since phosphorus is present in it.

Instead of these fertilizers, dissolve in a ten-liter bucket of water 0.5 kg of bird droppings, or 1 liter of mullein, or 0.5 kg of ash. Then mix the ingredients, leave the solution for a day to infuse. Pour 0.5 liters of solution under the roots of one plant. A week later, do the same top dressing again.If the weather is cool, then it is better to cover the plants with a film.

If the lower leaves turn blue or red, then this is due to a lack of nitrogen. The cabbage stops growing. This often happens during bad weather. Then the plants are fed with solutions of ammonium nitrate, urea, ammonia water.

The leaves changed their color and holes appeared in them

Why did cabbage leaves change color and eaten?

This is due to pest attacks:

1. The defeat of the cabbage spring fly. Cabbage fly larvae are small, inconspicuous worms that feed on roots. To eliminate the pest, solutions of Rovikurt (0.1%), Tolkord (0.1%), Anometrin (0.6%) are used.
2. The appearance of the cabbage scoop. It is a small brownish gray butterfly. If you notice insects, then you need to spray preparations on cabbage: Ambush, Tsimbush, Belofos, Cyanox.
3. Attack of aphids. Insects are able to eat most of the plant very quickly. For prevention, it is necessary to properly water the culture. If the aphid nevertheless attacked, then the plants are treated with Tolkodorm, Ambush, Corsair, Rovikurt, Antio.
4. The defeat of the cabbage leaf beetle. What to do if you see a leaf beetle? Spray plantings (0.15%) with Aktellik.

The problem can also arise due to various diseases:

• leaves turn yellow, wither, do not form into heads if affected by clubroot;
• peronosporosis (downy mildew) - yellowish spots appear during the disease, then the plant dies.

If any spotting occurs, spray the plants with 1% Bordeaux mixture, then spray again after a week.

The leaves of the plant are turning yellow

Cabbage leaves turn yellow with potassium deficiency. After the edges of the leaf blades become brown. As a result, heads of cabbage are medium-sized, loose and deformed. Sprinkling lime into the soil improves the absorption of phosphorus, nitrogen, and potassium by the roots. Sprinkle potassium sulfate on the ground.

The leaves of the plant have white or black spots

The reason for the white spots on the leaves is a lack of magnesium. They become like marble, then begin to dry out. In this case, put lime in the soil and feed the cabbage with solutions of potassium magnesia, magnesium sulfate.

If you see slightly depressed gray or black spots with a diameter of 1 - 5 mm on the leaves, this means that there is an excess of nitrogen and a lack of potassium in the ground.

If you find whitish oil spots, then this means that the culture is affected by linen. To eliminate the disease, spray the plants with preparations that contain copper.

If the cabbage seedlings are covered with grayish fluffy mold and have small dark spots, this is gray cabbage rot.

Crop leaves curl or wilt

Leaves curl as a result of:

• insect attacks;
• water scarcity;
• lack or excess of batteries in the earth.

With a lack of potassium, the edges of the leaves become brownish-yellow, after which the leaves curl and die. In the absence of boron in the ground, the leaves turn white, their edges curl. With a lack of molybdenum, young leaves curl up.

Foliage curls when burned as a result of improper pesticide treatment. Loosen the soil more often and water the plants in the evening. Water is poured into holes or furrows. In hot weather, you can water with sprinkling.

In case of illness, the black leg of the plant is sprayed with Bactofit, Planriz, Fitosporin, Fitolavin-300.

Prevention of discoloration of cabbage leaves

Observe crop rotation. You can’t plant cabbage if cruciferous plants grew before it: swede, daikon, mustard, watercress, turnip, radish, radish, horseradish, as they may have similar diseases with cabbage, for example, keel. They are affected by the same pests.

Choose a cabbage variety for planting that matches your region. If you plant cabbage in the north, then do not plant late-ripening varieties, as you will not be able to harvest due to the fact that the season is shorter in the north, that is, there will not be enough time for cabbage to grow. Don't plant a variety in the south that doesn't handle heat well.

Be sure to treat the seeds before planting, treat the seeds with a pink solution of potassium permanganate. Plant and care for cabbage properly.

Watch the phytosanitary condition of the landing site. Pull out weeds in time, especially those that belong to the cruciferous family - colza and shepherd's purse.

If you plant dill, carrots, onions, nasturtium in the aisles, this will scare away pests. Try sprinkling cabbage leaves and the ground around them with ashes or tooth powder. Spray the culture with an infusion of celandine or tomato tops.

If you follow the agricultural practices of growing cabbage correctly, then the risk of reddening of the leaves due to a lack of necessary useful elements, damage to cabbage by diseases and pests will be significantly reduced.

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