What disease is caused by Xanthomonas sp. in crucifers?

Black rot is a disease caused by the bacterium Xanthomonas campestris pv. campestris, which specifically affects cruciferous plants or the Brassicaceae family. This pathogen is known for its ability to cause significant damage to crops such as cabbage, broccoli, and cauliflower. The disease manifests as V-shaped lesions at the leaf margins, which can lead to leaf wilting, yellowing, and eventually plant death if not managed properly.

Understanding the impact of this bacterium on crucifers is critical for effective pest management strategies, including crop rotation, resistant varieties, and proper sanitation practices to reduce the spread of the disease. Other diseases listed, such as crown gall and Pierce's disease, are caused by different pathogens and affect different plant families, while Huanglongbing is a citrus disease caused by a different bacterial species altogether. This highlights the importance of accurate identification of plant pathogens to manage crop health effectively.