Plant Diseases and Control - Plant Pathology - Life Sciences Previous Year Questions

1

2007 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2007

Identify the wheat disease based on the following given symptoms.
- The disease appears when the ears emerges in plants
- Diseased ears emerges out of the boot leaf a little earlier than the healthy ones
- Black powdery mass of spores replace the flowers
- The growth of the plant and its general appearance is not affected

A

Loose smut of wheat

B

Flag smut of wheat

C

Black rust of wheat

D

Powdery mildew of wheat

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2

2008 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2008

'Bordeaux mixture' contains

A

Copper nitrate and ferric chloride

B

Copper sulphate and slaked lime

C

Copper sulphate and ferric chloride

D

Ferric chloride and slaked lime

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3

2008 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2008

Group-I: P: Late blight of potato, Q: Early blight of potato, R: Black scurf of potato, S: Wart diseases of potato
Group-II: 1. Synchytrium endobioticum, 2. Rhizoctonia solani, 3. Alternaria solani, 4. Phytophthora colocasiae, 5. Phytophthora arecaceae, 6. Phytophthora infestans

A

P-6, Q-3, R-2, S-1

B

P-6, Q-3, R-1, S-2

C

P-5, Q-3, R-2, S-1

D

P-4, Q-3, R-2, S-1

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4

2012 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2012

Match the name of the disease with the causal organism.
Disease
P. Black rot of sugarcane
Q. Stem rot of jute
R. Tikka disease of groundnut
S. Crown gall of grapes
Causal organism
1. Cercospora personata
2. Macrophomina phaseolina
3. Ceratocystis adiposa
4. Synchytrium endobioticum
5. Agrobacterium tumefaciens
6. Colletotrichum corchorum

A

P-1, Q-3, R-6, S-5

B

P-2, Q-3, R-1, S-5

C

P-3, Q-2, R-1, S-5

D

P-2, Q-6, R-3, S-4

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5

2015 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2015

Match the name of the diseases with their causal organisms.

Disease	Causal Organism
P. Loose smut of wheat	1. Cercospora personata
Q. Wart disease of potato	2. Alternaria solani
R. Panama disease of banana	3. Synchytrium endobioticum
S. Tikka disease of groundnut	4. Ustilago tritici
	5. Fusarium oxysporum
	6. Erwinia amylovora

A

P-6, Q-4, R-3, S-2

B

P-4, Q-6, R-1, S-3

C

P-4, Q-3, R-5, S-1

D

P-2, Q-3, R-2, S-6

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6

2017 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2017

Match the pathogen, disease caused and the affected plant in the CORRECT combination.
Pathogen P. Blumeria graminis Q. Magnaporthe grisea R. Venturia inaequalis S. Cercospora personata
Disease i. Blast disease ii. Powdery mildew iii. Tikka disease iv. Scab disease
Plant 1. Groundnut 2. Apple 3. Barley 4. Rice

A

P-i-1, Q-ii-2, R-iii-3, S-iv-4

B

P-i-2, Q-ii-1, R-iii-4, S-iv-3

C

P-ii-3, Q-i-4, R-iv-2, S-iii-1

D

P-ii-3, Q-i-4, R-iii-2, S-iv-1

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7

2018 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2018

Select the CORRECT combination by matching the disease, affected plant and the causal organism.

A

P-2-v, Q-1-iv, R-3-iii, S-4-vi

B

P-2-ii, Q-1-i, R-4-iii, S-3-i

C

P-4-iii, Q-1-iv, R-2-i, S-3-ii

D

P-4-vi, Q-1-iii, R-3-ii, S-2-v

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8

2020 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2020

'Bakanae' disease or 'foolish seedling' disease is caused by

A

Fungus

B

Bacterium

C

Virus

D

Mycoplasma

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9

2020 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2020

Select the CORRECT combination by matching the disease, causal organism and the affected plant.

Disease	Causal organism	Affected plant
P. Stem rust	i. Cercospora personata	1. Wheat
Q. Wart disease	ii. Plasmopara viticola	2. Ground nut
R. Tikka/leaf spot	iii. Synchytrium endobioticum	3. Potato
S. Downey mildew	iv. Puccinia graminis	4. Grape
		5. Apple
		6. Rice

A

P-iv-1, Q-iii-3, R-i-2, S-ii-4

B

P-ii-1, Q-i-6, R-iv-4, S-iii-2

C

P-iii-1, Q-iv-3, R-i-5, S-ii-4

D

P-iv-1, Q-ii-3, R-iii-2, S-i-5

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10

2023 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2023

Match the following rice diseases in Group I with their causal agents in Group II.

Group I	Group II
(P) Blast	(1) Sclerophthora macrospora
(Q) False smut	(2) Rhizoctonia solani
(R) Sheath blight	(3) Ustilaginoidea virens
(S) Downy mildew	(4) Puccinia graminis
	(5) Magnaporthe grisea

A

P-5; Q-3; R-2; S-1

B

P-4; Q-2; R-5; S-3

C

P-4; Q-5; R-3; S-1

D

P-5; Q-4; R-1; S-2

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11

2024 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2024

Which of the following plant diseases is/are caused by nematode?

A

Cereal cyst of barley

B

Ergot of rye

C

Wart of potato

D

Ear-cockle of wheat

Check answer

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12

2024 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2024

Which of the following combinations of plant diseases and the types of their causal organisms is/are CORRECT?

A

Late blight of potato – Bacteria

B

Black rot of crucifer – Bacteria

C

Tungro disease of rice – Mycoplasma

D

Root knot of tomato – Nematode

Check answer

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13

2025 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2025

Which one of the following agents causes the necrotic ring spot disease in stone fruits?

A

Fungi

B

Bacteria

C

Virus

D

Nematodes

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14

2025 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2025

Identify the correct statement(s) with respect to plant disease.

A

Hairy root disease in tobacco is caused by Agrobacterium tumefaciens

B

Loose smut of barley is caused by Ustilago nuda

C

Stem rust of grape is caused by Plasmopara viticola

D

Fire blight in pear is caused by Erwinia amylovora

Check answer

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15

2026 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2026

Which one of the following commercial products is used as a systemic fungicide to control plant diseases?

A

Captan

B

Phaltan

C

Thiram

D

Benomyl

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16

2026 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2026

Which of the following plant genera is/are example(s) of partial stem parasite?

A

Striga

B

Orobanche

C

Viscum

D

Cuscuta

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17

2026 · Life Sciences · Plant Pathology · Plant Diseases and Control

Life Sciences (XL) 2026

Correctly match the following plant diseases in Group-I with their causal organisms in Group-II.

Group-I	Group-II
(P) Red rot of sugarcane	(1) Albugo candida
(Q) Tikka disease of groundnut	(2) Cercospora personata
(R) Late blight of potato	(3) Plasmodiophora brassicae
(S) White rust of mustard	(4) Phytophthora infestans
	(5) Colletotrichum falcatum

A

P–1; Q–2; R–4; S–3

B

P–5; Q–1; R–4; S–2

C

P–5; Q–2; R–4; S–1

D

P–5; Q–3; R–1; S–2

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