A) AIternaria solani
B) Ustilago nuda
C) Puccinia graminis
D) Xanthomonas oryzae
Correct Answer: C
Solution :
Black (stem) rust of wheat is caused by Puccinia graminis (tritici, a fungus belonging to Sub-class-Teliomycetidae, Order- Uredinales. It is a heteroecious species which completes its life cycle on two plants, ie, barberry (Berberis) plant and wheat (Triticum aestivum).
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