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