WAEC Agricultural Science Past Questions & Answers - Page 248

1,236.

The most common weed of pasture in West Africa is

A.

Ageratum conyzoides

B.

Tridax procumbens

C.

Imperata cylindrica

D.

Boerhavia diffusa

Correct answer is B

No explanation has been provided for this answer.

1,237.

Weevils can be controlled by

A.

Providing adequate vantilation in soils

B.

Storing dry grain in air-tight containers

C.

Heating the store before storing grains

D.

Placing cribs under shade

Correct answer is B

No explanation has been provided for this answer.

1,238.

The variety if maize which is less susceptible to weevil attack is

A.

Yellow maize

B.

Flint maize

C.

Floury maize

D.

Sweet maize

Correct answer is B

No explanation has been provided for this answer.

1,239.

Moths, aphids and mealy bugs cause damage to crops by their

A.

Piercing and sucking activities

B.

Piercing and chewing activities

C.

Chewing and biting activities

D.

Boring and chewing activities

Correct answer is A

No explanation has been provided for this answer.

1,240.

Smut disease of cereals is caused by a

A.

Bacterium

B.

Fungus

C.

Protozoan

D.

Nematode

Correct answer is B

No explanation has been provided for this answer.