Question

study of hamful pests of crops and bayologycal prevcention for them ​

Answer 1

$\sf{\underline\blue{Answer:-}}$

Biological control or biocontrol is a method of controlling pests such as insects, mites, weeds and plant diseases using other organisms. It relies on predation, parasitism, herbivory, or other natural mechanisms, but typically also involves an active human management role.

Answer 2

Answer:

No sorry but we did not have to study that which is harmful for us . so o can't say any thing .

I AM EXTREMELY SO SORRY .