Biological Control of Weeds
The use of living organism (Bio-agents) such as insects, disease organisms, herbivorous fish, snails and even competitive plants to limit weed infestation is called biological control of weeds. It is also known as the classical biological weed control.
The philosophy behind the biological weed control is that in nature the growth of many weeds remains limited due to biotic stresses from their natural enemies, largely the insect pests and diseases. Therefore, the bio-agent which is specific to particular host wed can be used for control of the weed.