A newly planted plant may give rise to excitement, because often the leaves of seedlings begin to change color. Let’s analyze what problems exist with tomato leaves and their causes.
- White or black
- Precautions
- Yellow or brown
- Improper watering
- Brown spots
- Purple or blue
- Twisting and drying the foliage
- Conclusion
Tomato leaf color change problem
White or black
If the leaves on the tomato bushes turn white, blacken or turn gray plant acclimatization occurs false. Usually seedlings are grown in a room where they are taken care of in compliance with all standards. When planting in open ground, seedlings experience stress, which is manifested in light or dark spots on the leaves.
The main causes of stress are:
- The sunlight is too bright. In this case, only the burned areas change color.
- Temperature differences. This leads to darkening of the foliage.
- High wind speed or cold precipitation.
White or black spots may appear when the root system is disturbed during planting. It is better to transplant seedlings in glasses, so the probability of breaking the stem or root is reduced.
The black color of the leaves of any plant, including tomato, indicates tissue necrosis. Restore the original color does not work, the leaves simply dry out. This happens for various reasons: frost, illness, mechanical injury.
Precautions
If the leaves turn black, turn pale or have a gray tint, preventive measures are taken . To prevent blackening or blanching of the leaves, tomatoes are covered with medium-density agrofiber. So that it does not fall and does not violate the trunk of the plant, special metal arched canopies are installed. Every day, a film is lifted for several hours to produce oxygen by the plant. After 2 weeks, the shelter is completely removed.
Any agrofibre of any make and density is breathable material, unlike film. It lets air and moisture into the shelter. Therefore, removing it every day is not necessary. In addition, plants do not breathe oxygen. They absorb carbon dioxide during photosynthesis and release oxygen.
Spraying is possible. For these purposes, Zircon or Epin is used: 1 ml of the substance is diluted in 10 liters of water and sprayed on the plant the day after planting.
Yellow or brown
Tomatoes often change color growing in a greenhouse.
Irregular watering
To prevent leaves from turning yellow or turning brown, moderate watering should be carried out. They do this only when the soil has already begun to dry and loosening measures have been taken. If these rules are not followed, the root of the plant is broken and the leaves turn yellow immediately.
Yellowing of the leaves indicates that the plants are deficient in light, or lack of nitrogen, or both.
Brown spots
Damaged bushes should be removed from the site
Brown areas appear due to the disease of chlorotic curl. The lower parts of the plant become yellow, and the upper part fades. This viral disease cannot be treated, so all damaged bushes are removed, and the soil is treated with disinfectants like Tsifoks.
Brown spots are a sure sign of damage by pests or diseases. The shape, size, location of the spots on the leaves will tell the experienced agronomist the reason for their appearance and ways to eliminate them.
Lack of fertilizer
Tomatoes in the open ground may turn yellow or turn brown due to a lack fertilizers.To get rid of this problem, fertilize with complex substances and alternate organics (humus or litter) with minerals.
It is advisable to fertilize the soil once a week.
Purple or blue
Tomatoes turn blue for two interrelated reasons:
- sudden changes in temperature;
- insufficient amount of the necessary substances in the ground.
If the stem and lower part of the bush turn purple, the seedlings start to freeze and stop growing. The temperature for the normal development of the tomato bush should be in the range of 18-20 ° C. If the leaves or stem become purple, the temperature drops to 13 ° C. For this reason, it is immediately necessary to normalize the temperature regime. If no changes have occurred, the reason lies in the insufficient number of chemical elements in the soil.
If the leaves turn brown, rust or redden, the bush needs phosphorus, so you should immediately apply a complex of fertilizers. If the treatment has helped, the red, brown or violet patches lighten, the appearance of the plant improves.
Curl and shrink foliage
If the dry leaves curl up, the plant lacks nitrogen. It needs a complex of mineral fertilizers, which is applied at the very root after watering.
Leaflets that turn down are a signal of a lack of phosphorus.
A large amount of moisture accumulates in the lower part of the bed. The temperature in this place is gradually decreasing. Tomatoes in cold conditions are not able to take nutrients from the soil, as a result, the leaves of seedlings gradually curl.
Among other things, the leaf cover dries up due to lack of nutrients and plenty of sunshine. If the leaves have become dry or a plaque has formed on them, the problem is in the nutrition of the soil and the plant itself, you should immediately get rid of the damaged areas.
Conclusion
If the tomato bushes get dark , covered with pale or dark spots, dry out from burns, in most cases the fault is due to improper care. That is why gardeners must first of all pay attention to the rules of planting and agricultural technology.
