In Brassica, resistance to cabbage aphid is related to:
A) High saponin in leaves
B) Low sinigrin in leaves
C) High tannin in leaves
D) All of the above
In alfalfa, resistance to spotted aphid is associated with:
A) High silica content
B) High saponin in leaves
C) High DIMBOA in leaves
D) Low sinigrin in leaves
In wheat and barley, resistance to green bugs is associated with:
A) High silica content
B) High tannin content
C) High benzyl alcohol
D) High aspartic acid
In barley, resistance to cereal leaf beetle is associated with:
A) High benzyl alcohol
B) Waxiness of leaves
C) High silica content
D) High Aspartic acid
Disease and insect resistance is governed by:
A) Oligogenes
B) Polygenes
C) Plasma gene
D) All of the above
In plants, resistant genes for disease and insect resistance are used from:
A) Cultivated varieties
B) Wild species
C) Micro-organisms
D) Hessian fly
In wheat, example of durable insect resistance includes resistance to:
A) Hessian fly
B) Green bugs
C) Red pericarp
D) All of the above
In cotton, example of durable resistance includes resistance to:
A) Jassids
B) Leaf curl
C) Cotton bollworm
D) All of the above
Vertical resistance can be exploited through:
A) Development of varieties with individual major gene
B) Development of multilines
C) Gene pyramiding
D) Gene deployment
E) All the above
In India, parasitic weed of sorghum is:
A) Striga spp.
B) Cuscuta spp.
C) Orobanche spp.
D) None of the above

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