-So, let me first give you a brief overview of black rot disease.
-This disease is caused by the bacterium Xanthomonas campestris pv. campestris or Xcc in short name.
-The typical characters of this bacteria are gram negative bacterium and rod shaped cell showing a polar flagellum as you can see from figure 1.
It can cause disease in a large number of species of Brassicaceae.