(a) State four ways in which weeds are beneficial to the farmer. [4 marks]
(b) Classify insect-pests in three groups based on their mode of feeding and give two examples of each [9 marks]
(c) State three ways by which pasture can be made available to cattle. [3 marks]
(a) Ways in which weeds are beneficial to the farmer
(b)Classification of insect-pests based on their mode of feeding and examples:
(i) Biting and chewing insects e.g locusts, grasshoppers, termites, mantids, the stick and leaf insects, beetles, leaf worms, army worms, budworms, crickets, larvae of lepidopetera
(ii) Piercing and sucking insects e.g capsids, cotton stainers, whiteflies, scale insects mealy bugs, green shield bugs, aphids, thrips, tsetsefly, ticks
(iii) Boring insects e.g beetles, weevils, stem borers, fruit borers
(c) Ways by which pasture can be made available to cattle
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