Question

Why should preventive measure and biological control method be preferred for protecting crops.

Answer 1

hi dear.....
as biological methods would return the soil fertility to a great extent. ..
biological methods refers to methods like green manuring...etc..
also further biological methods don't have any counter effects ....
as the other chemical treatment methods do have .....


hope helps u. ..

....♡¿♡...

Answer 2

Answer:

Diseases in plants are caused by pathogens. To get rid of pathogens, some preventive measures and biological control methods are used as they are simple, economic and minimise pollution without affecting the soil quality.