Question 3
Study specimens G, H, I and J carefully and answer the following questions.
(a) (i) Classify specimens G and H according to their feeding habits. [ 2 marks ]
(ii) Name one part of crops damaged by each of specimens G and H. [ 2 marks ]
(iii) State three ways in which specimen H is economically important. [ 3 marks ]
Observation
This question was also well attempted by the candidates. In 3(a)(i-ii), majority of the candidates could classify specimens G (Grasshopper) and H (Bean beetle) according to their feeding habits as well as name the parts of crops damaged by specimens G (Grasshopper) and H (Bean beetle) but most of them could not state the ways in which specimen H (Bean beetle) is economically important as required in 3 (a)(iii). However, in 3(b), most of the candidates were able to state the ways of controlling specimens I (Bird) and J (Rat)
The expected answers include:
3 (a)(iii) Ways in which specimen H (Bean beetle) is economically important
- Destroys viability of seeds /destroys cotyledon
- Reduces market value of crop/quality of crop.
(ii) Name one part of crops damaged by each of specimens G and H. [ 2 marks ]
- Increases farmer’s cost of production.
- Reduces the quantity of stored produce (seed)