Answer :

The main ideas behind the biological control of pests and diseases is that the population of pests is controlled by the introduction of natural predators of these pests in the environment. The natural predators of these diseases causing pests are to keep the population in control and protect the plants or crops from getting harmed.

Some examples are:


i. The Lady bird beetle is used to control the population of insects like Aphids.


ii. Nucleopolyhydro viruses (NPVs) are being used to kill insects such as caterpillars and butterflies which damages the plants and crops. NPVs damages the midguts of the insects to kill them.


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