Q. Which one is the wrong pairing for the disease and its causal organism?
A) Black rust of wheat – Puccinia graminis
B) Loose smut of wheat – Ustilago nuda
C) Root-knot of vegetables – Meloidogyne sp.
D) Late blight of potato – Alternaria solani
Explanation
[Solution from source] Late blight of potato is caused by the oomycete Phytophthora infestans; Alternaria solani causes early blight of potato. The other three pairings (rust by Puccinia, smut by Ustilago, root-knot by the nematode Meloidogyne) are correct. Answer (4).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.