What causes the leaves of pepper seedlings to turn yellow
Pepper is a very common vegetable in our daily lives. The market demand for it in our country is also very large, and it is basically cultivated in every region. When we grow peppers, we often encounter many problems that affect pepper yield. This is especially true during the pepper seedling stage, and yellowing leaves are one of them. So what causes the leaves of pepper seedlings to turn yellow? Below, the editor will give you a brief introduction. Let's take a look together!
1. High temperature and drought
After pepper seedlings are planted, their roots are still in a relatively fragile state. Therefore, we need to promote seedling establishment in peppers through water and fertilizer management. However, if they are in a high-temperature and drought environment, then the roots of the pepper seedlings will be affected in their water and fertilizer uptake, causing the lower leaves of the plant to turn yellow due to poor nutrition. If this is the cause, then we should properly spray foliar fertilizer and water in time to help the seedlings recover as soon as possible. This is especially true in summer, when yellowing leaves caused by high temperature are very likely to occur, so everyone must pay close attention.
2. Nitrogen deficiency and magnesium deficiency
During the growth process of pepper seedlings, the demand for nutrients is relatively high. If a certain nutrient is lacking, then many problems are also likely to occur. If peppers lack nitrogen, then the plants will become thin and weak, short, and the leaves will be thin, small, and yellowed. In severe cases, leaf drop will occur. Therefore, we should pay attention to the application of nitrogen fertilizer, but not too much, to avoid excessive vegetative growth in peppers. Magnesium deficiency can also cause yellow leaves in peppers, usually occurring at the early fruiting stage. The veins of old leaves will gradually turn yellow, then gradually spread along the veins to the entire leaf. If magnesium is deficient, spray a solution such as magnesium sulfate once about every week.
3. Potassium deficiency and calcium deficiency
In addition to nitrogen deficiency and magnesium deficiency, potassium deficiency is also a main cause of yellow leaves in peppers. If the pepper plant lacks potassium, then yellowing will gradually begin from the leaf margins. The leaves in the middle part of the plant will also gradually turn yellow. At this time, properly spray potassium dihydrogen phosphate twice, and the proportion of potassium fertilizer can also be increased during topdressing. Finally, calcium deficiency can also cause the upper leaves of the plant to turn yellow, and the plant will also become dwarfed as a result. The leaves around the growing point of the plant gradually stop growing, and in severe cases wither and die. If this situation occurs, spray calcium chloride once about every five days.
4. Pesticide damage and fertilizer damage
When fertilizing and applying pesticides while growing peppers, if the dosage is improper, then the plants are highly prone to pesticide damage and fertilizer damage. If not handled in time, this will cause yellow leaves and reduced yield in mild cases, and death in severe cases. After pesticide damage occurs in peppers, the leaves will show scorched and yellowed symptoms, but these will not spread. After fertilizer damage occurs, pepper leaves will show symptoms such as yellowing and shrinking. Therefore, when affected by fertilizer damage or pesticide damage, we should pay attention to watering in time to dilute it. We can also apply an appropriate amount of foliar fertilizer or growth regulators, then carry out intertillage work, and take good remedial measures.
The above is a brief introduction to what causes the leaves of pepper seedlings to turn yellow. That is all for today's introduction. This article is for reference only, and we hope it can be helpful to everyone!