Question

in what way insets attack the crop

Answer 1

there are many ways like
1.they bore to the stem of the plants
2.suck the plant sap
3.they damage the plant parts like that of the stem,leaf and so on

Answer 2

Insects*

*Insects are responsible for two major kinds of damage to growing crops. First is direct injury done to the plant by the feeding insect, which eats leaves or burrows in stems, fruit, or roots. ... Although most insects grow and multiply in the crop they damage, certain grasshoppers are well-known exceptions..