What diseases and insect pests will appear in Chinese cabbage planted in spring? What preventive measures are there?

Field fertilizer and water management to ensure plant growth; And ensure high and stable yield of Chinese cabbage. Through scientific control, it can effectively reduce the infestation of diseases and pests such as clubroot, soft rot, aphid and diamondback moth, ensure high yield, and become a "magic weapon" for vegetable farmers to increase their income and get rich. Chinese cabbage is a vegetable crop that likes light and cold. In the northern region, planting is mostly carried out in spring and autumn. Because of the high temperature and humidity in summer, Chinese cabbage is prone to diseases and pests, and farmers generally do not plant Chinese cabbage in summer. When there is no water, you can sow the seeds of Chinese cabbage and finally apply a thin layer of fine soil. Note that it is best not to plant Chinese cabbage in early spring. When the temperature is unstable, the germination rate of wheat vegetables will decrease.

The growth cycle of Chinese cabbage is short, and it takes about 35 days from sowing to growing 5-7 leaves, so it can be eaten from the side seedlings. Cantonese people like to dry Chinese cabbage to make soup. After transplanting to a big tree, you can peel the leaves and eat them, or you can eat cabbage. Because of these characteristics, it is planted everywhere. Also consider the adaptability of varieties and resistance to pests and diseases. In production, we should pay attention to selecting varieties with multi-resistance and wide adaptability, followed by selecting varieties with high temperature resistance, rainstorm resistance, low temperature resistance, disease resistance and late harvest resistance, and finally selecting high-quality Chinese cabbage seeds with qualified quality.

Variety is the unique property of vegetables, and it is also the place where vegetables are different from other vegetables. Good varieties not only have high emergence rate, but also have strong disease resistance and easy planting management, which directly affects the yield. If the varieties are misused during planting, it will not only affect the emergence rate, but also reduce the yield and delay agricultural production. Chinese cabbage has shallow roots and many fibrous roots. Root groups are mainly distributed in the surface soil, with a depth of 3~ 10 cm and a diameter of 10 ~ 30 cm. Roots have strong regeneration ability, and the shortened stems before bolting are green. Leaves are wide, oval or ovoid, green or yellowish green.