Question

Why should preventive measure and biology and biological control methods be preferred for protecting crops?

Answer 1

$\textbf{Answer is in Attachment !}$

Answer 2

$\colorbox{tan}{ANSWER!}$

Preventive measures and biological control methods are preferred for protection of crops because they are not harmful to crops as well as to environment. They are in logically safe, target specific and harmless to other organisms.