The following crops can be grown as cover crops except
Pueraria phaseoloides
Stylozanthes gracillis
Centrosema pubescens
Nicotiana tabacum
Calopogonium mucunoides
Correct answer is D
No explanation has been provided for this answer.
Biological control of insect pests of crops can best be carried out through
Crop rotation
Use of parasites and predators
Soil fumigation
Farm sanitation
Use of resistance varieties
Correct answer is B
No explanation has been provided for this answer.
Which of the following diseases of crops is not caused by a fungus?
Panama disease of banana
Smut of rice
Mould of stored grain
Streak of maize
Black pod isease of cocoa
Correct answer is D
No explanation has been provided for this answer.
A bacterium
A nematode
A virus
A fungus
An insect
Correct answer is D
No explanation has been provided for this answer.
Leaf spot
Root knot
Leaf blight
Twister
Mosaic
Correct answer is E
No explanation has been provided for this answer.