Yellow spots on tomato leaves: causes of appearance and methods of struggle

Yellow spots on tomato leaves can appear for a variety of reasons. It can be fungal or viral diseases, adverse weather conditions, pests. If you have a similar problem, you need to take it seriously. After all, not eliminating the root cause, you can lose the entire crop.

Single yellow spots on the tomato leaves indicate that the plants are experiencing stress. It really can be so, provided that in general tomatoes look healthy, without twisted leaves or any other external manifestations of the disease. Stress can cause transplantation, adverse conditions or sudden changes in temperature and humidity. As a help for plants, you can recommend the drug "Riverm". And, naturally, it is necessary to get rid of stress factors.

Yellow spots on tomato leaves can appear from sunburn. They are very easy to recognize - they are light, yellowish-gray, dry. Affected and healthy plants should be lightly shaded on sunny days. If, in the presence of yellow spots, the lower leaves begin to twist, and in general the tomatoes look drooping, which means that they lack moisture. Abundant irrigation and, if possible, a decrease in temperature will correct the situation.

One of the most common fungal diseases in tomatoes is cladosporium. Or, speaking in more simple terms, a blotchy spot. At the initial stage of the disease on the lower leaves appear light spots, which then turn yellow, and even later darken. Small (up to 1 cm), irregular or oval shaped brown spots on the leaves of a tomato throughout the plant indicate that the disease has gone far enough. After this stage, the affected plant dies quickly enough, so it is necessary to fight the disease at an early stage of the disease development. As an effective tool, you can recommend "Hom". In order to reduce the risk of infection of healthy plants, it is necessary to adjust the temperature and humidity (if the plants are grown in a greenhouse). Fungus does not develop with a humidity of less than 70%.

Yellow spots on tomato leaves appear when plants are infected with a mosaic virus. With this disease, the leaves twist, and the fruit shows an uneven color. Affected plants need to be destroyed, since the virus can be easily transferred to healthy tomatoes when watering or pampering. As a preventive measure, it is recommended to dress seeds before planting in a 1% solution of potassium permanganate.

Even yellow spots on the leaves of a tomato can arise because of a lack of certain trace elements. Yellowing of the lower leaves, the presence of bluish-red veins and the small size of the leaves indicate a lack of nitrogen. Yellow chlorosis between veins, partial necrosis of leaves and bending of their tips inward means a lack of magnesium. Uncharacteristic yellowing of young upper leaves and the appearance on the fruits of apical decay are most likely caused by the lack of calcium, iron and copper in the diet of plants. The appearance of yellow spots on young leaves, the curvature of the apex, the general fragility and fragility of the plant indicate a lack of boron. To correct a situation it is possible at top dressing, applying mixes with a necessary set of microcells.

The most important thing with the appearance of yellow spots is not to miss the moment and eliminate the root cause of the problem. Then you can do without serious losses.