Some varieties of Sphydrocyanides (HCN) in root exudates are resistant to wilt due to the presence:
A) Sunflower
B) Safflower
C) Castor
D) Linseed
Sugar beet cyst nematode was reported by:
A) Needham
B) Cobb
C) Schacht
D) Smith
The discovery of mosaic by Meyer in 1886 was the beginning of studies on viruses as incitants of diseases in plants:
A) Tomato
B) Mungbean
C) Tobacco
D) Soyabean
The organism lacking a well-defined nucleus are termed:
A) Fungi
B) Prokaryote
C) Eucaryote
D) Protozoa
The plant disease primarily responsible for the "Great Bengal Famine" of 1943 was:
A) Blast disease of rice
B) Bacterial blight of rice
C) Udbatta disease of rice
D) Brown leaf spot of rice
Secondary spread of ergot of bajra is through:
A) Seed
B) Air
C) Insect
D) Both (A) and (C)
Powdery mildews are controlled by spray of:
A) Copper fungicides
B) Mercury fungicides
C) Sulphur fungicides
D) Miscellaneous fungicides
Once the pathogen has established in an area, steps taken to remove or destroy it is known as:
A) Exclusion
B) Eradication
C) Protection
D) Management

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