Question

how are insects damage crops ?explain chemical method to control it​

Answer 1

Answer:

Chemical control

Chemical pesticides are often used to control diseases, pests or weeds. Chemical control is based on substances that are toxic (poisonous) to the pests involved. When chemical pesticides are applied to protect plants from pests, diseases or overgrowth by weeds, we speak of plant protection products.

Answer 2

Answer:

they bring several diseases to the crop like leaf molliting.

they can be controlled by chemical fertilizers