Sometimes enormous efforts are required to grow tomato crops from gardening. After all, the plant is attacked by a phytophthora , then bacterial decay - there are a lot of diseases, but you have to fight with all. It often happens that tomato leaves twist upwards and this greatly affects the yield, which means that it requires human intervention.
Why do tomato leaves twist up in the greenhouse?
It is noticed that greenhouse tomatoes are more prone to twisting, in contrast to ground ones. This is due to a mismatch between the temperature of the soil where the roots are located and the upper part of the plant, which is in the sun.
The tomato leaf curls up into the tube, when the heat begins sharply after cool or even cold weather. The soil does not have time to warm up, and the air in the greenhouse is already hot. To prevent the disease, during the summer period it is necessary to regularly open the greenhouse, leaving open the cracks for through ventilation.
Twisting ground tomato
But not only greenhouse plants are susceptible to this disease. It often happens that tomato leaves curl up and turn yellow even in the open ground. This happens for various reasons, it is not always possible to find out.
The main cause of twisting of tomato leaves is the unstable air temperature. If the night is cold enough, and the day scorching heat, then this has a very negative effect on the entire plant.
When the daytime temperature exceeds 35 ° C, the plants lose the ability to absorb nutrients from the soil and also from the fertilizing. And those that were earlier, just split and the fasting of the plant begins.
As you know, tomatoes like abundant, but rare hydration, if watering is abused, then the leaf plate can also twist - around the central vein of the leaf, its edges are wrapped, and the leaf itself acquires a purple hue.
Abuse of pasynkovaniy sometimes can lead to the twisting of the top leaves on the bushes of tomatoes, and therefore it is necessary to sever the stepson reasonably and only at the beginning of the growing season, and not before the ripening of the crop.
It is noticed that among all varieties of tomatoes the tallest species are most susceptible to the twisting of the leaf plate. Because to guarantee the harvest of tomatoes on the site should be planted not only them, but also low-growing varieties, which are not so threatened with twisting of leaves.
But if you find that the twisted leaves begin to turn yellow, then this is a signal of a lack of trace elements in the soil. Most often plants require intensive intake of phosphorus, zinc and iron, and then nutritional composition will be required.
A good complex of necessary microelements is provided by urea and slurry, which are introduced into the inter-rows for uniform distribution between plants or bushes are poured individually.
If the cause of twisting of leaves on tomatoes can not be identified, and this happens often enough, then sprinkling over leaves with some biological preparations can help. So, in a cool and humid weather, tomato bushes are processed from a spray with a solution of Epin,
Why do tomato leaves twist upwards?
If in small plants that have not yet been planted in the soil, leaflets begin to twist up, then unequivocally, they do not have a soil that is poor in zinc and phosphorus. To correct the situation it will be necessary to top dress with complex preparations with microelements.
Still the leaves of the seedling can be twisted from the excess of the sun, and therefore on hot days it must be shaded. In order not to cause twisting and burn of the leaves.