Why do tomato leaf edges curl up or down?
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TOMATO LEAVES BEND - WHAT TO DO? AGRONOM'S TIPS
Soon after planting tomato seedlings in the greenhouse, the leaves began to curl at the plants. Previously, I did not notice such a phenomenon. What's happening? Maybe tomatoes are missing some elements? Or is it a disease?
Innokenty Valentinovich SAMUSENKOV, Bashkortostan, Davlekanovo
Leaves are a kind of "signal flags" by which the plant makes it clear what it needs. In the described case, there may be several options depending on the nature of the folding of the leaves.
WHY DO THE EDGES OF THE LEAVES BEND UP IN TOMATOES?
If the leaves take the shape of a boat or even a tube, be sure to look for aphids on the “deck” or in the “hold”, and around the bushes - ants, which contribute to the spread of small insects.
If no pests are found, then the reason is in weather conditions that are not suitable for the plants. These are usually large differences between night and day temperatures: for example, 15 and 35 degrees. The rolling effect is enhanced by a lack of moisture, when the dry soil cracks and damages the roots. In this case, 5-6-liter plastic water bottles should be placed in the greenhouse, which will act as heat accumulators, smoothing out temperature peaks. And the beds themselves must be mulched with straw,
hay, dried grass or sawdust. It is advisable to spray the plants with "Epin-extra", "Zircon" or "Novosil".
Another reason is calcium deficiency. In this case, the plants must be fed with calcium nitrate.
If aphids are found on the leaves, you should immediately begin to fight this pest. Plants must be treated with soap-herbal or soap-ash liquids. In the first case, a concentrated infusion of wormwood, garlic or celandine is prepared, 2-3 tbsp. l. this extract is added to a bucket of water with dissolved laundry soap (40 g). Instead of herbal infusion, you can add a glass of wood ash to the same soap solution. After filtering these liquids, alternating, spray tomato plantings.
It is not recommended to use insecticides, because at this time the tomatoes already have flowers and even ovaries. But you can use the biological product "Fitoverm" (1 ampoule per 1 liter of water).
Note
Often, gardeners themselves provoke leaf curling in tomatoes by watering the plants with a too saturated solution of potassium permanganate. It should not be purple or burgundy, it is permissible to use only pink liquid. It is obtained by adding crystals to a bucket of water at the tip of a knife.
Eggplants do not like being close to tomatoes. Therefore, they do not need to be placed side by side - neither on the windowsill, nor in the garden.
WHY TOMATO LEAVES BEND DOWN
This is a more dangerous signal. This is how the first symptoms of bacterial cancer often appear. As a rule, the lower leaves are affected first, gradually the disease progresses upward.
To diagnose a disease, you need to cut off a stem. With bacterial cancer, a brown ring will be found on the cut - this is how the affected vessels look. It is impossible to cure this disease; the plants that have picked it up should be immediately removed and burned.
If the color of the cut is even, green, the reason for the curling of the leaves may be a lack of trace elements. The problem is solved by top dressing, best of all foliar, with fertilizer complexes containing the necessary substances.
FOLK RECIPE FOR LEAVING LEAVES
Wood ash (2 liters) pour 5 liters of boiling water, after cooling, bring the volume to 10 liters, add 10 g of boric acid powder, a bottle (10 ml) of iodine. Insist during the day. Dilute the resulting liquid with water in a ratio of 1:10. Consume 1 liter per bush.
See also: Why do the top leaves twist in tomatoes (tomatoes)
WHAT TO DO IF TOMATO LEAVES CURL - VIDEO
An agronomist Nikita Yurevich ZHELANKIN, St. Petersburg answered the reader's question
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WHY DO TOMATOES LEAVES TWIST?
There are several reasons.
If the upper leaves of tomatoes are twisted, this indicates a lack of calcium. It is necessary to carry out foliar feeding of plants using calcium nitrate (20 g per 10 liters of water).
When the plants are very hot and there is not enough moisture, the upper leaves are folded into tubules to reduce evaporation. If the tomatoes are in the greenhouse, you need timely airing and watering.
With an excess of nitrogen in the soil, the plants fatten, and the leaves curl. This can be corrected by applying abundant watering and foliar feeding with potassium (1 tsp potassium sulfate per 1 liter of water).
Leaf curl is caused by small black aphids that appear on stems and leaves. To destroy it, plants must be carefully sprayed with pesticides.
Sometimes leaf curl causes the curl virus. The leaves begin to curl at the top, the stem does not stop growing, the leaves become yellowish or light green in color. Such a diseased plant must be removed from the site immediately so as not to infect other tomatoes.