Which of the following disease is caused by bacteria ?

Options

A. Tobacco mosaic
B. Black rot of crucifers
C. Red rot of sugarcane
D. Late blight of potato

Explanation

To determine which of the following diseases is caused by bacteria, we will analyze each option provided:

1. **Tobacco Mosaic**: This disease is caused by the Tobacco Mosaic Virus (TMV). Since it is caused by a virus, it is not the correct answer.

2. **Black Rot of Crucifers**: This disease is caused by the bacterium *Xanthomonas campestris*. Since this is caused by bacteria, it is a potential correct answer.

3. **Red Rot of Sugarcane**: This disease is caused by the fungus *Trichoderma falcatum*. Since it is caused by a fungus, it is not the correct answer.

4. **Late Blight of Potato**: This disease is caused by *Phytophthora infestans*, which is an oomycete (similar to fungi). Therefore, it is not caused by bacteria.

After analyzing all the options, the only disease caused by bacteria is:

**Final Answer: Black Rot of Crucifers (caused by *Xanthomonas campestris*)**