MCQ on Plant Pathology | Diseases - Plant Defense Mechanisms

MCQ on Plant Pathology - Diseases - Plant Defense Mechanisms

1. Ratoon stunting disease of sugarcane is

A) Insect transmitted 

B) Soil-transmitted

C) Sap transmitted 

D) Root transmitted


2. Blast disease of rice is caused by

A) Piricularia oryzae 

B) Pseudomonas oryzae

C) Scleroticum oryzae 

D) Helminthosporium oryzae

 

3. Powdery lesions on the underside of the coffee leaves appear as orange-yellow to

red orange in color known as coffee rust is caused by

A) Hemileia vastatrix 

B) Puccinia graminis

C) Cronartium ribicola 

D) Uromyces phaseoli


4. Partial or complete loss of virulence in the pathogen is called

A) Abortive parasitism 

B) Attenuation

C) Neutralism 

D) Susceptibility


5. Phytoalexins are produced

A) During infection 

B) During flowering

C) Throughout the lifecycle 

D) By seedlings only

Planthopper


6. Root wilt is a serious disease causing havoc in coconut plantations.

A) The disease is caused by Plant hopper and lacewing bug

B )The disease is caused by Phytoplasma, Planthopper and lacewing bug spreads the disease

C) The disease is caused by Phytoplasma Plant hopper spreads the disease

D)Planthopper)The disease is caused by Phytoplasma and spread by wind

 

7. A dead area in the bark or cortex of the stem especially of woody plants is called

A) Spot 

B) Canker

C) Scorch 

D) Die-back

 

8. Katte disease of cardamom is caused due to

A) Colletotrichum elettariae 

B) Phytophthora medii

C) Cardamom mosaic virus 

D) Fusarium sp.

9. Red rot of sugar cane is caused by

A) Colletotrichum falcatum 

B) Xanthomonas citri

C) Alternaria solani 

D) Fusarium oxysporum

 

10. Late blight of potato is caused by

A) Alternaria solani 

B) Phytophthora infestans

C) Pseudomonas solanacearum 

D) Albugo bliti

Learn more: Quiz on Plant Pathology

Answers:  Quiz on Plant Biotechnology

1. C) Sap transmitted 

2.A) Piricularia oryzae 

3. A) Hemileia vastatrix 

4. B) Attenuation

5. A) During infection 

6. B )The disease is caused by Phytoplasma, Planthopper and lacewing bug spreads the disease

7. B) Canker

8. C) Cardamom mosaic virus 

9. A) Colletotrichum falcatum 

10. B) Phytophthora infestans

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