Question

Match List I with List II:
\begin{tabular{|l|l|} List I (Disease) & List II (Pathogen)
A. Root rot of cotton & I. Pythium myriotylum
B. Rhizome rot of ginger & II. Rosellinia necatrix
C. Root rot of apple & III. Rhizoctonia bataticola
D. Black scurf of potato & IV. Rhizoctonia solani

Choose the correct answer from the options given below:}

• A. A-II, B-III, C-IV, D-I
• B. A-IV, B-II, C-I, D-III
• C. A-III, B-I, C-II, D-IV
• D. A-I, B-III, C-II, D-IV

Hint:

In pathology questions, associate Rhizoctonia solani almost exclusively with "Black Scurf" in potatoes and "Sheath Blight" in rice.
Pythium is usually associated with "Damping off" and soft rots.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Plant diseases are caused by specific fungal pathogens, and matching them requires knowledge of plant pathology.

Step 3: Detailed Explanation:
1. Root rot of cotton (A): Caused by Rhizoctonia bataticola (also known as Macrophomina phaseolina). It leads to sudden wilting and drying of plants. (Matches III).
2. Rhizome rot of ginger (B): Primarily caused by Pythium myriotylum. This is a soil-borne water mold that causes soft rot of the rhizomes. (Matches I).
3. Root rot of apple (C): Specifically, white root rot is caused by Rosellinia necatrix. It causes a cottony white growth on the root surface. (Matches II).
4. Black scurf of potato (D): Caused by Rhizoctonia solani. It is characterized by black sclerotia on the tuber surface which do not wash off. (Matches IV).

Step 4: Final Answer:
Matching the pairs: A-III, B-I, C-II, D-IV. This corresponds to Option (C).