Hybrid vigour in crop improvement is brought about through
Introduction
Mass selection
Inbreeding
Cross breeding
Correct answer is D
No explanation has been provided for this answer.
The use of fungal pathogens to control dodder weed is a
Physical method
Mechanical method
Biological method
Cultural method
Correct answer is C
No explanation has been provided for this answer.
The control of spear grass on the farm is difficult because
It produces a large quantity of seeds
It is easily propagated by suckers
It has a very persistent rhizome
Seeds presist in the soil for a long time
Correct answer is C
No explanation has been provided for this answer.
Rosette disease of groundnut is transmitted by
An eelworm
A grasshopper
A whitefly
An aphid
Correct answer is D
No explanation has been provided for this answer.
Which of the following insect groups readily attacks dry grains?
Boring insects
Biting insects
Sucking insects
Piercing insects
Correct answer is A
No explanation has been provided for this answer.