In the process of cabbage cultivation and growth, it is often the case that a cabbage plant has no top. Instead of one top bud growing upward, there are 2-3 or 4-5. The side buds of cabbage grow into cabbage seedlings. If the nutritional conditions are good, they will grow into small balls. Generally, they cannot form balls normally. This phenomenon of multiple cabbage seedlings growing on one cabbage plant is called multi-head phenomenon. This phenomenon not only affects cultivation and management, but also affects cabbage yields and can even easily lead to the occurrence of pests and diseases. The growth process of cabbage is the advantage of top growth. The main top bud grows, and the lateral buds do not germinate. In special circumstances, after the top bud is damaged, it stops growing. On the shortened stem of cabbage, the lateral buds can germinate and grow into multiple side branches. , seriously leading to production cuts. Reasons for the phenomenon of multiple heads in cabbage;

1. Freeze damage: Cabbage seedlings are raised in the cold winter. During the seedling raising process, the wind is not released in time, the air outlet is suddenly large and small, and the top buds of the seedlings are very tender, and they are most susceptible to frost damage. , the cold wave suddenly arrives, and strong low temperature will also cause the terminal buds to be frozen.

2. High temperature hazards: Sometimes a sudden rise in temperature can burn the terminal buds, causing them to stop growing

3. Insect damage: During the nursery process or when just planting, The plants are weak and the terminal buds are tender, and aphids, cabbage caterpillars, diamondback moths, etc. can damage the terminal buds and kill them.

4. Phytotoxicity: Whether in winter or summer, spraying pesticides or spraying nutrients, etc., with uneven concentrations can easily damage the terminal buds.

5. Improper human operation: When dividing seedlings and planting, the top buds are bruised, causing damage to the top buds, causing the top growth to stop, and the lateral buds to germinate with multiple heads.