Causes of curling of Tomato leaves

Tomato is a very popular vegetable, which has a large planting area in the north and south of our country. Tomato is very rich in nutrients, so it is welcomed by many people. However, when we grow tomatoes, we often encounter a lot of problems affecting the growth of tomatoes. And tomato leaf curl is one of them. So what causes tomato leaves to curl? The following editor will give you a brief introduction, let's have a look!

1. Heart-picking and pruning too early

When growing tomatoes, we need to pick the heart and prune. But we should pay attention to the coring time, if the coring is too early, it is very easy to lead to axillary bud growth, resulting in the transport of phosphoric acid in the leaves can not be transported, the leaves will also aging, resulting in leaf curling phenomenon. In addition, when pruning, the time to remove lateral branches should not be too early. It should wait until the lateral branch grows to about 7cm. If the pruning time is too early, then the assimilation area of the leaf will be too small, the growth of the aboveground part of the plant will be affected, and the growth of the root will be greatly affected, resulting in the phenomenon of leaf curling.

2. High temperature and drought

During the peak period of tomato fruit, temperature and moisture are very important. If you encounter high temperature and dry weather, then you should pay attention to timely watering and do a good job of replenishing water. If it is not watered in time, it will have a great impact on the growth of tomatoes. Because at this time, the leaf area is very large, and the high temperature and strong light environment will lead to leaf transpiration too strong, water evaporation too fast, so that the lower leaves of the plant appear curling phenomenon.

3. Improper fertilization

In the process of tomato growth, the demand for nutrition is still relatively large. Therefore, we should pay attention to fertilizing work, control the application of nitrogen fertilizer, and remember not to apply too much nitrogen fertilizer. If too much nitrogen fertilizer is applied, it is easy to cause fertilizer damage to tomatoes, resulting in leaflet flipping and curling. And excessive application of nitrogen fertilizer will lead to tomato lack of phosphorus, potassium and various trace elements. Then all will lead to the leaf is too small and abnormal phenomenon.

4. Disease and drug damage

The disease is also one of the main causes of tomato leaf curl. Among them, especially the virus disease, the leaves of tomato are easy to fade, become smaller and wrinkle after the emergence of virus disease. Generally speaking, it is easy to appear on the heart leaves and the upper leaves of the plant, especially in high temperature and strong light. Then there is the drug damage, many people use the medicine to dip the flower during the flowering period of the tomato, if the concentration is too high or the leaves are in direct contact with the agent, then it will lead to leaf curling.

The above is a brief introduction to the causes of tomato leaf curling. That's all for today's introduction. This article is for reference only. I hope it can be helpful to everyone.