Biological control of pests is

Which fish controls diseases like malaria and filariasis by feeding on mosquito larvae?

Ladybird and dragonfly are very useful in getting rid of $........$ respectively.

Baculoviruses are/have:

Which insect was used to check the spread of cacti?

The cessation of reproduction in an organism by creating hurdles in its biology or physiology,or its destruction by the use of another organism,is known as: