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Plant Pathology-5

Q.1
Khaira disease of rice is controlled by spraying_________.

Copper sulphate
Manganese sulphate
Zinc sulphate


Q.2
The disease responsible for the great Bengal famine in 1942-43 is________.
Rice blast
Brown spot of rice
Wheat rust


Q.3
‘Mosaic’ is the specific symptoms produced only by____________.
Virus
Phytoplsama
Viroid


Q.4
Sooty or charcoal like powdery mass usually appearing on floral organs particularly the ovary, leaf, stem and roots is_________.
Smut
Bunt
Sooty mould


Q.5
Only one disease cycle occurring per season in___________.
Monocyclic diseases
Polycyclic diseases
Polyetic diseases


Q.6
The alternate host for pearl millet (bajra) rust is_______.
Brinjal
Mustard
Tomato

Q.7
The fungal disease related to the discovery of gibberellins is_________.

Rice blast
Foolish seedling disease of rice
Rice false smut


Q.8
The direct infection and loss of floral organs as well as seed occurs in___________.
Karnal bunt of wheat
Ergot of pearl millet
Both


Q.9
Which of the following rust is not caused by fungi ?
Black rust
Yellow rust
Red rust


Q.10
Black, yellow and brown rust are generally caused by__________.
Puccinia spp.
Uromyces spp.
Both


Q.11
In contrast to black rust, white rust is_____.
Autoecious rust
A disease of crucifers
Both


Q.12
A group of diseases caused by basidiomycetes are_______.
Mildew
Smut
Ergot


Q.13
Flooding is the effective method to control_______.
Fusarium
Phytophthora
Ustilago


Q.14
The typical example of monocyclic diseases is______.
Loose smut of wheat
Sesame phyllody
White rust of mustard


Q.15
Bacterial rot of wheat ears is also known as_________.
Spike blight
Yellow slime disease
Both


Q.16
Brown rust of wheat is caused by_________.
Puccinia striiformis
Puccinia graminis tritici
Ustilago tritici


Q.17
Loose smut of wheat is a__________.
Soil borne disease
Internally seed borne disease
Air borne disease


Q.18
Grassy shoot disease is caused by__________.
Bacteria
Algae
Phytoplasma


Q.19
The pith of the red rot affected cane emits_________.
Alcoholic smell
Fried-egg like smell
Rotten fish like smell


Q.20
Ear showing honey dew symptoms is characteristic feature of___________.
Green ear of bajra
Grain smut of bajra
Ergot of bajra


Q.21
Red rot of sugarcane is also known as_______.
Red smut
Net rood snot
Both


Q.22
The order ‘Peronosporales’ include pathogen causing_________.
Damping off
White rusts
Both


Q.23
Which of the following smut of sorghum is not a seed-borne disease ?
Grain smut
Long smut
Loose smut


Q.24
Phyllody is caused by_________.
Bacteria
Fungi
Phytoplasma


Q.25
The mode of infection in ergot of bajra is_________.
Shoot infection
Seedling infection
Local infection of blossom

Number of score out of 25 = Score in percentage =


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