Question

how are insects damage the crops explain chemical method to control it

Answer 1

Answer:

Stem-boring insects can kill or deform individual stems or whole plants. ... Insects with sucking mouthparts, such as aphids, scales, leafhoppers, and true bugs, feed by sucking sap from plant tissues. This type of feeding can cause spotting or stippling of foliage, leaf curling, and stunted or misshapen fruits.

Answer 2

Explanation:

They bring several diseases to the crop like leaf mottling etc. ...

They can be controlled by using chemical fertilizers. ....