Do you know why tomatoes turn black?

2024 Author: Howard Calhoun | [email protected]. Last modified: 2023-12-17 10:16

All gardeners dream of a good harvest of tomatoes. But sometimes brown spots and rot bring all the work to naught. This usually happens in August - when green fruits appear on the plant. Why do tomatoes turn black? Let's look into this matter.

Late blight and gray rot

Phytophthora fungus spores need only a drop of water to germinate, so during the risk period (July-August), tomatoes are watered under the root. Leaves and fruits should not get wet. If the disease has affected the plants, then every day you need to remove diseased fruits and leaves, folding them outside the garden plot. This will prevent the spread of late blight. In addition, ventilation and illumination of crops are improved, which also has a negative effect on the fungus.

If the tomatoes turn black from below, then this is gray rot. This disease spreads with calcium deficiency in the shoots or excessive soil acidity. Another option for the appearance of gray rot is the wrong dose of fertilizer when feeding.

Disease prevention

For disease preventionYou should be aware of such a thing as crop rotation. He implies that tomatoes should not be planted next to potatoes and in the area where peppers or potatoes grew. They also cannot be left in their place: they should appear in the same bed in 4 years.

Why do tomatoes turn black and how to prevent this process? This is the main question for gardeners. You should know that for planting tomatoes, you need to choose areas with good illumination, ventilated from all sides. A rare planting pattern will also protect the plant from the spread of diseases, since bright sunlight is detrimental to fungi.

There is no one hundred percent protection of plants from diseases, because a person does not control the weather, and late blight spores develop in a humid environment. Why do green tomatoes turn black? This is the manifestation of the above disease. For its prevention, abundant watering should be excluded. If the area is small, then the tomatoes should be watered with warm water, which was previously heated in the sun. When top dressing, fertilizer application rates must be taken into account.

Agricultural activities

Why do tomatoes turn black if the site is chosen correctly, and all the conditions are met? The fact is that the disease develops where it is warm, humid and calm. To destroy a favorable environment for the fungus, plants need to be pinched and the stems tied to stakes or trellis.

From the ground to the lower leaves should be about 30 cm - this will ensure the necessary airing of the soil. Pasynkovanie and pinching accelerate growth andfruit ripening, so the crop can be harvested before the development of late blight. Gardeners also spray the bushes with s alted warm water, and at the first sign of infection - with one percent Bordeaux liquid.

So we answered the question of why tomatoes turn black. The main thing is to remember that the fungus loves heat, moisture. Therefore, it is necessary to carry out all preventive and agrotechnical measures in a timely manner and observe the conditions for growing tomatoes.