The clubroot bacteria affected the normal absorption of the cabbage roots, resulting in the lack of water and nutrients for the seedlings, which could not grow normally and develop slowly. The leaves are dark in color, and the leaf margins are yellow. In severe cases, withered and dead, there is no yield. Prevention methods are as follows; Cultivation techniques and chemical control The pathogens in the remnant soil are the primary sources of clubroot infections. Transportation of the carrier (seedlings) with bacteria (soil) is one of the main methods for long-distance transmission. Dissemination of diseased bodies with soil, running water, and agricultural operations is the reason for the spread of field diseases. The whole growing period of Chinese cabbage can be susceptible to diseases. The hot and humid climate conditions and acidic soil environment in summer and autumn are conducive to the occurrence of diseases. In addition, large-scale planting of susceptible varieties has aggravated the occurrence and harm of clubroot disease. Therefore, it is necessary to adopt a combination of cultivation techniques and chemical control methods to control the clubroot disease of cabbage. Selection of disease resistant varieties Kangen cabbage a 27# The leaf ball is shaped like a ball, with a green outer leaf, a yellow heart, and good quality. The growth period is about 67 days. Plant height 30 cm, single ball weight 2.5-2.8 kg, good spring, Kunming surrounding areas sown in April, can be the first listing. Spring planting disease resistance is strong, the field diseased plant rate is about 7%, it is not suitable for summer sowing, but can not broadcast second water dish. Kangen cabbage - 36# The ball cannonball is shaped like an outer leaf green, yellow when the heart is in, and the quality is good. The growth period is about 65 days. Plant height 29 cm, single ball weight 2.5-2.81 g, good cold resistance, Kunming surrounding areas sown in April-May, suitable for medium-sized wards, spring planting disease rate is about 6%, not suitable for broadcast two water dishes. Kagan Root Cabbage - 39# The leaf ball is shaped like a ball, with a green outer leaf, a yellow leaf, and good quality. The growth period is about 65 days. Plant height 30 cm, single ball weight 2.5-3.0 kg. Good heat resistance, sowing in the surrounding area of ​​Kunming in May, suitable for the medium-sized ward, the spring planting strain rate is about 6%, not suitable for broadcast two water dishes. The king of Kangen cabbage - 51# The leaf ball is shaped like a ball, with a green outer leaf, a yellow leaf, and good quality. The growth period is about 65 days. Umbilical height 30 cm, single ball weight 2.5-2.8 kg, good heat and moisture resistance. In the four months surrounding Kunming, the disease resistance was strong, and the field disease rate was about 5%. It is the best variety resistant to clubroot disease in China. Imipenem Crude,Imipenem Trihydrate,Imipenem Monohydrate,Imipenem Intermediate Xinxiang Haibin Pharmaceutical Co.,Ltd , https://www.carbapenemspharmacy.com