Why cabbage leaves turn yellow: what to do and how to deal with it

Any changes in the appearance of plants are signals of problems. If the cabbage began to turn yellow, is it dangerous, what can be done about it. The question is not idle, because there are many reasons for this phenomenon. Some vegetable diseases are too dangerous to ignore. If the cabbage leaves turn yellow, then immediate action should be taken. First of all, you need to find out why the cabbage leaves turn yellow, what the plant lacks. If the cause is a disease, what to do and whether it is possible to save the crop.

Unfavorable environmental conditions

The plant is sensitive to any disturbances in the growth process. The question of why cabbage leaves turn yellow often arises. The cause can be either a lack of nutrition or a serious fungal disease.

When a cabbage leaf turns yellow and dries up, this may indicate the impact of the following factors.

• Lack of nitrogen in the soil. Impoverishment may be due to a violation of crop rotation, when the soil was cultivated by the same crop. If you cultivate cabbage for a long time in one area, the soil will become poorer and degradation of subsequent plantings will occur, during which the crop may simply dry out. High temperatures can lead to similar consequences, or if there is not enough light in the beds.
• Wrong type of soil. Not all types of soil are suitable for growing cabbages. For example, when trying to cultivate on sandstone, the plant will sprout, but the shoots quickly become sick and weak. Leaves wither, turn yellow and fall.

• Insufficient watering leads to drying and death of the roots. The leaves begin to turn yellow, the plant gradually weakens and dies. If the summer is hot and the sun is merciless, the plants may also begin to turn an unhe althy yellow color.
• Excessive watering is also harmful to the plant. The roots begin to rot, trace elements from the soil cease to flow into the leaves. The edges of the leaves turn yellow and begin to curl and then dry out.

Any of the above factors causes a partial loss of the cabbage crop. Measures to improve the soil and change the irrigation regime must be implemented as soon as possible. After discovering the fact of yellowing of the leaves, you need to use all means so that the culture has time to recover and give a harvest before the onset of winter.

Important! To prevent fungal diseases, crop rotation should be observed, returning plants of the same species to their original planting site no earlier than three years later.

The impact of viruses and pests

Yellowing of the leaves in addition to the external environment is also affected by microorganisms and pests. The most common reasons are as follows.

• Fusarial wilt through roots or jaundice. The fungus enters the vascular system of the plant and clogs it, causing wilting. Green leaves begin to turn yellow and fall off. It begins to appear through yellow spots between the veins, then the lower leaves turn yellow and the plant begins to die. On the cut of the shoot, brown spots of the fungus are visible. The set heads are small and irregular in shape.
• Peronosporosis or powdery mildew. It is a parasitic fungus. Manifested through yellow spots on the leaves. On the reverse side, the leaves turn white due to the formation of fungal plaque. The growth of the plant slows down, then the leaves turn pale and gradually die.

• Pests eat the roots, limiting the plant's access to the micronutrient supply from the soil. Parts of the plant begin to dry out, growth stops. Such parasites include the scoop, the bear, the May beetle. The presence of pests is one of the reasons why cabbage seedlings turn yellow.

Due to the infection of crops with pests or infection, changes appear on the shoots, the leaves of the cabbage turn yellow. Often after treatment, the plants continue their normal growth in the garden and produce a crop. But you need to take it seriously and monitor the signs of the disease in a timely manner when yellowness appears on the plants.

Important! For a guaranteed yield, plant hybrid varieties that are immune to common cruciferous plant diseases.

How to cure cabbage from yellowing

If the leaves turn yellow and lethargic, this is a serious problem. The plant gives you a signal that its life processes are under threat. It is important to identify the causes and deal with them with the right methods. The following steps need to be taken.

• First you need to carefully examine the soil and cabbage for uncharacteristic deviations. To more accurately determine the cause of the disease, remove one of the plants from the soil, pay special attention to the condition of its roots and examine the edge of the leaf. Check the temperature conditions, see if the sun illuminates the plants.
• Cabbage turns yellow if there are signs of depleted soil, or the crop rotation rules were not observed. In this case, you need to add chicken manure. It contains nitrogen and trace elements important for cruciferous plants. After enriching the soil, the cabbage, whose leaves turn yellow and dry, begins to produce fresh green shoots.

• In case the soil dries, you need to establish regular watering. If the soil is oversaturated with moisture, on the contrary, it is necessary to limit watering and ensure regular loosening so that the soil dries out faster.
• Against fungal diseases of kale, such as powdery mildew, Phytophtorin and Ridomil Gold should be used. Against other infections, a less aggressive method is suitable, you can water the crops with a 1% Bordeaux mixture solution.
• In case of pests, plants should be treated with systemic fungicides. For this purpose, the preparations Benomyl, Tekto, Topsin-M are suitable. Sprinkling ash or charcoal on the yellow leaves is also helpful to prevent further pest attack.

Following the above tips will help you quickly solve the problem of yellowing leaves and save the harvest.

Recommendations

In order to prevent crop losses in the future, you must follow the following folk recommendations when cultivating cabbage.

• Do not plant diseased seedlings, so as not to infect the soil. Remove yellowed plant residue from the soil, as the fungus can remain viable in the soil for several years.
• Treat the soil with lime at the rate of 1 kg per 4 square meters. m to enrich its composition.
• Regulate soil moisture. Do not allow to dry out and prevent waterlogging of the soil. Try not to water the plants with cold water, which is why re-infection with fungal infections is possible. Green cabbage requires using mostly warm water for its irrigation.

• Regularly disinfect the soil and the remains of planting material to prevent re-infection or reproduction of pests, the appearance of yellow-green shoots.
• Observe crop rotation, do not plant cabbage on the same ridges in the garden. It is better to plant crops after cucumbers, potatoes, beans.

Following these tips will effectively fight infection and harvest a good cabbage crop in the future.

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