How to control black rot of Chinese cabbage?

Black rot of cabbage is a worldwide disease caused by Xanthomonas, which harms cabbage vegetables. It mainly harms leaves and bulbs, which can occur at all growth stages.

Prevention and control of black rot: prevention is the priority, and cabbage varieties with relatively high disease resistance such as Zhonggan No.8, Qiugan 1, Qiugan No.2 and Qiugan No.3 are selected. Through crop rotation, soaking seeds in warm soup and reducing field humidity, the incidence rate was reduced. When the central disease strain is found, it should be removed in time. At the initial stage of the disease, 600 times of 14% copper ammonia solution, 500 times of 77% copper hydroxide wettable powder, 500-800 times of 75% chlorothalonil wettable powder, 40% carbendazim plus sulfur gel suspension 1000 times or 4000 times of 72% agricultural streptomycin soluble powder can be sprayed for prevention and treatment.