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Correct Answer – C
Black rot of caucifers is not a fungal disease , it is caused by a bactria ,Xanthomaones campestris Other three diseases are caused by fungal infection .
Rust of wheat is caused by a gugus puccinia ,Red rot of sugarcane is caused by Colletotrichum falcatum and smut of barjra is caused by Tolysporium penicillariae.
Correct Answer – C
The pathogen responsible for black rot of crucifer is a bacterium Xanthomonas campestris. It lives on the plant residue in the soil or in the seed.