First, the cause of the disease
The main reason is that the leaves of cabbage seedlings grow to a certain number, stem diameter is 0. 6-1.6 cm above, after a certain time of low temperature (0-15 °C), the formation of flower buds in the vernalization period and bolting in the following spring.
Second, preventive measures
1. Majestic control of sowing and planting period should not be premature, otherwise the bolting rate is high.
2, choose winter strong, difficult to immature bolting varieties.
3, fertility control during seedling stage. If spring cabbage is over-fertilized at seedling stage and the plants are too large during overwintering, it is easy to feel the effect of low temperature. After development, the appearance of immature bolting occurs.
4, for the implantation. The prosthesis can inhibit the size of the seedlings. Usually, the spring cabbage needs to be planted once during production. If the growth is too prosperous, the prosthesis can be twice. However, if the number of prostheses is too large, the yield will be adversely affected.
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