Violation of the technology of growing garden crops under the conditions of home gardening often causes a change in the appearance of plants and a significant decrease in yield. A symptom of the disease is often a change in the color of the foliage. In tomatoes, purple leaves are quite rare, however, this problem requires increased attention and the use of the correct treatment or prevention regimen.
To understand why a tomato has purple leaves and what to do if seedlings develop very poorly or do not grow at all, you need to know the botanical features of tomatoes and be able to distinguish the physiological state of the plant from the symptoms of disease damage.
Tomato or tomato (Solánum lycopérsicum) belongs to the herbaceous plants of the Solanaceae family, which are widespread in our country. This tasty and healthy vegetable crop has the following characteristics:
In home gardening, cultivation of non-standard and standard varieties of tomato is practiced.
If the leaves or other aerial parts of the tomato have become different from the color stated in the varietal description, it is necessary to determine the cause of this phenomenon as soon as possible and choose the most effective way to rid the garden crop of the problem.
Orange-violet or pale leaves with a violet tint appear on tomato bushes not too often. The most common causes of this occurrence are as follows:
As a rule, such physiological conditions adversely affect yield indicators, but do not cause the death of a vegetable crop.
It should be remembered that there are several varieties of tomatoes in which, at the stage of formation of the first leaves of seedlings, a purple hue appears on the veins or on the leaf plate itself from the bottom of the stem. A striking example of this variety is the tomato "Good", the leaves and stems of which at the seedling stage acquire a delicate violet-lilac color.
There are several external reasons for the color change, including growing seedlings in a too cold soil substrate, as well as low air temperature or insufficient amount of phosphate fertilizers. If measures are not taken in a timely manner, tomato seedlings will be too weak, often ill and poorly adapted for planting in a permanent place. Also, productivity indicators of garden crops are significantly reduced.
In recent years, it has become fashionable to grow tomatoes in the home gardening, forming the fruits of unusual coloring. Ripe tomatoes of these varieties can be not only red, pink, orange and yellow, but also purple.
Among these varieties, for example, is the tomato, well-known to foreign and domestic amateur vegetable growers "Cherokee purple heart" or "Cherokee Purple Heart", bred by American breeders. The purple pigment called anthocyanin contained in the ripe fruits of this variety is a powerful antioxidant that helps in the fight against cancerous tumors and cardiovascular diseases.
There are a number of pathological conditions that cause a change in staining of the fruit at different stages of ripening. If we are not talking about varieties artificially enriched with anthocyanins, then you should pay attention to neighboring cultures. Quite often, a purple hue on tomato fruits appears as a result of pollination with eggplants growing in the immediate vicinity.
But if the fruits acquire not just purple, but almost black staining, this may indicate damage to tomato bushes by such rather dangerous diseases as late blight or apical rot.
Depending on what caused the purple color of the aerial parts of tomato bushes, the following measures may be required:
For irrigation, it is necessary to use warm water, heated during the day by the sun's rays, irrigating directly to the root system and preventing water from entering the aerial part of the plant.
Thus, in order to get strong and most productive plants, it is necessary to periodically inspect seedlings and tomato bushes, as well as to control the temperature and observe the rules of agricultural technology for growing vegetable crops.