Do the leaves turn yellow in seedlings? Find out the reason
You planted the seedlings, looked after her, wellwater, but once found that the leaves turn yellow in seedlings tomato. This is the first warning of the plant that something is wrong with it. It is worth paying attention to this, if in the future you do not want to lose most of the planned harvest.
Why does the seedling turn yellow?
Quite often horticulturists have to facewith a variety of diseases that affect the harvest. However, scientists conducted a number of experiments and found that the yellow leaves of tomato seedlings for several reasons.
- Instability of the temperature regime, sharp changes can affect seedlings. To restore, start to observe the ventilation mode.
- Lack of light can also affect the yellowing of the leaves. Sunlight is essential for photosynthesis, so increase its access to the plant.
- Lack of important nutrients in the soilleads to flocculation of the plant. To avoid this, simply carry out top dressing of the soil with nitrogen fertilizers or cow manure (in the ratio 1:10).
Before planting new tomato seeds, treat them with races
"Adult" seedling turns yellow
Sometimes even after carrying out all the necessarypreventive work after planting the plant in the ground yellow leaves in the seedling tomato. In this case, you need to check a few more reasons for the appearance of yellow leaves.
If the plant resets only the loweryellowed leaves, then this is a normal natural process. Thus, tomatoes get rid of unnecessary ballast, so that all the forces and juices go to the formation of inflorescences and fruits.
The situation is different if the leaves turn yellowtomato seedlings are not only lower, but also upper, and the whole plant looks weak and sluggish. The cause of this may be fungal disease (fusariosis). The main distinguishing feature of this disease is the cracked stalk in places and its blackening.
Damaged plants can not be saved,so dig them out and burn them, and to prevent the disease, the remaining seedlings are best treated with biological products. For soil decontamination, add fertilizers rich in potassium and phosphorus.
Even the best tomato varieties can be exposedsuch a disease as late blight. The appearance of brown spots on the leaves, yellowness and shrinkage indicate that the plant is infected with this disease. The virus can easily overwinter in the soil on parts of plants, and in spring it infects young seedlings. To avoid the disease, treat the tomatoes with fungicidal agents, Bordeaux fluid, and reduce the soil moisture (for irrigation use drip irrigation).
Remember that it is better to prevent the onset of the disease than to remove it later. Timely processing of tomato seedlings with proper care will allow you to harvest a rich harvest of tomatoes.
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