Q60 Match Group I (plant disease), Group II (causal organism) and Group III (affected plant) in CORRECT combination.
| Group I | Group II | Group III |
|---|---|---|
| P. Kamal Bunt | I. Phytophthora infestans | a. Rice |
| Q. Ergot | II. Ustilago maydis | b. Potato |
| R. Smut | III. Blumeria graminis | c. Rye |
| S. Powdery mildew | IV. Puccinia recondita | d. Wheat |
| V. Claviceps purpurea | e. Barley | |
| VI. Alternaria solani | f. Brinjal |
CSIR NET Plant Pathology Matching: Correct Disease-Causal Organism-Plant Combinations
Karnal bunt affects wheat and is caused by Tilletia indica, while late blight targets potato via Phytophthora infestans. Powdery mildew on wheat comes from Blumeria graminis, and other pairings follow specific fungal-host relationships key for CSIR NET Life Sciences exams.
Correct Answer
Option (A): P-I a, Q-V b, R-II d, S-I e is correct.
P (Karnal bunt) matches I (Tilletia indica) and a (wheat), as this smut fungus infects wheat kernels during flowering.
Q (Late blight) pairs with V (Phytophthora infestans) and b (potato), the oomycete causing foliar and tuber rot in cool, wet conditions.
R (Powdery mildew) links to II (Blumeria graminis) and d (wheat), where superficial hyphae produce white powdery conidia on leaves.
S (Early blight, implied by Alternaria solani) connects to IV (Alternaria solani) and e (brinjal/eggplant), though it primarily hits potato/tomato; exam context fits solanaceous crops.
Option Analysis
Option (B): Incorrect
P-III (Blumeria graminis) mismatches Karnal bunt, which is not powdery mildew. Q-V (Phytophthora infestans) is right but R-I (Tilletia indica) wrongly assigns rust-like rust to powdery mildew. S-IV fits but overall fails.
Option (C): Incorrect
P-II (Blumeria graminis) confuses bunt with mildew. Q-V correct, R-I wrong for mildew, S-II mismatches early blight.
Option (D): Incorrect
P-V (Phytophthora infestans) wrongly links oomycete late blight to bunt. Q-I mismatches, R-V bunt agent to mildew wrong, S-I incorrect.
Disease Details
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Karnal Bunt: Teliospores replace wheat grain endosperm, emitting fishy odor; quarantine issue in wheat trade.
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Late Blight: Sporangia/zoospores cause rapid necrosis on potato leaves/tubers; infamous Irish famine pathogen.
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Powdery Mildew: Blumeria graminis f.sp. tritici obligate biotroph on wheat; haustoria absorb nutrients.
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Others: Puccinia recondita (III) causes leaf rust on rye/wheat; Alternaria solani (IV) early blight on solanaceous plants.
Plant disease causal organism matching questions dominate CSIR NET Life Sciences exams, testing fungal pathogens like Karnal bunt on wheat (Tilletia indica), late blight on potato (Phytophthora infestans), and powdery mildew (Blumeria graminis). These pairings reveal host specificity crucial for agriculture and quarantine.
Core Matchings
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Karnal bunt replaces wheat kernels with teliospores.
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Late blight spreads via sporangia in humid conditions.
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Powdery mildew shows white mycelium on cereals.
Exam Strategies
Understand life cycles: smuts (bunts) vs. oomycetes vs. ascomycetes. Practice with Puccinia recondita (rye rust), Alternaria solani (early blight).
This guide boosts CSIR NET scores through precise plant pathology recall.
