What is the reason for Zhang Zan's thirteen millet rolls?

The main reasons for the rolling of Zhangzha No.13 are herbicide damage and element deficiency, as follows:

1. Herbicide damage: Too much application in the field and too short interval will cause herbicide damage and make millet leaves curl.

2. Element deficiency: lack of nutrients such as potassium, calcium and boron. Causes the leaves of millet to curl.

3. Drought: Long-term drought will also cause the leaves of millet to curl.

4. Phytotoxicity: The use of herbicide containing butyl ester will cause phytotoxicity, leading to the curling of millet leaves.

5. Thrips: Millet damaged by Thrips will also have curly leaves.