What is the ecological principle behind the biological control method of managing with pest Insects?

What is the principal behind the barrier methods of birth control?

Describe the main ideas behind the biological control of pests and diseases.

How can biological control of insects be done?

Explain biological control of pests and plant pathogens with examples.

Describe biological method of pest control.

What is biological control? What are advantages of adapting biological control as a method of controlling plant diseases and pest.

The biological control of agriculture pests, unlike chemical control is