Question

Based on following statements, choose the correct combination.
(A). Plasmodiophora brassicae causes clubroot of crucifers
(B). Spongospora subterranean causes powdery scab of potato
(C). Polymyxa graminis is a vector for soilborne wheat mosaic virus
(D). Plasmodiophoromycota are biotrophic parasites

• A. (A), (B) and (D) only.
• B. (A), (C) and (D) only.
• C. (A), (B), (C) and (D).
• D. (B), (C) and (D) only.

Hint:

Plasmodiophorids are notable for three things: they are soil-borne protists, they cause root galls/scabs, and they serve as vectors for major plant viruses (like SBWMV and Potato Mop-Top Virus).

Answer 1

The Correct Option is C