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

Answer

B

Explanation

The pathogen responsible for black rot of crucifer is a bacteria, Xanthomonas campestris. It lives on the plant residue in the soil or in the seed. First sign of the disease appears near the leaf margin, characterised by chlorosis, which progresses towards the centre of leaf blade. In the affected portions, the vein and veinlets turn brown and finally black.