Biological control

controlling of pests by interfering with their ecology (release of parasites or introduction of diseases into their environment, etc.)

Biological control of pests in agriculture is a method of controlling pests (including insects, mites, weeds, and plant diseases) that relies on predation, parasitism, herbivory, or other natural mechanisms. It can be an important component of integrated pest management (IPM) programs.
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In pest control, the use of animals and organisms that eat or otherwise kill or out-compete pests.

The practice of using beneficial natural organisms to attack and control harmful plant and animal pests and weeds is called biological control, or biocontrol. This can include introducing predators, parasites, and disease organisms, or releasing sterilized individuals. Biocontrol methods may be an alternative or complement to chemical pest control methods. Biocontrol is part of the Animal and Plant Health Inspection Service program to control several economically important pests of food and fiber crops; it also is researched and used by other USDA agencies that promote integrated pest management.
  

biological control
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