Question 336:

• WAEC 1990

The following are forestry crops except

A. Tectona grandis
B. Gmelina arborea
C. Anarcadium
D. Pinus eliotis
E. Chlorophora excelsa

Question 337:

• WAEC 1990

The pest designated as a national pest by the Nigeria Agricultural Advisory Council is

A. Variegated grasshopper
B. Thrips
C. Capsid
D. Cricket
E. Weevil

Question 338:

• WAEC 1990

Which of the following groups comprises only oil crops?

A. Groundnut, jute and cotton
B. Melon, coconut and sisal hemp
C. Coconut, cotton and sunflower
D. Sunflower, rubber and jute
E. Oil palm, sunflower and jute

Question 339:

• WAEC 1990

The mosaic symptom commonly associated with viral diseases of crops can be best observed on

A. Roots
B. Stem
C. Leaves
D. Fruits
E. Flower

Question 340:

• WAEC 1990

Pests of crops that feed by piercing and sucking plants include the following except

A. Stem borers
B. Aphids
C. Cocoa mirids
D. Cotton stainers
E. Cassava mealy bugs