biological control

noun
the control of pests by interference with their ecological status, as by introducing a natural enemy or a pathogen into the environment.
Also called biocontrol.


Origin:
1920–25

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Collins
World English Dictionary
biological control
 
n
the control of destructive organisms by the use of other organisms, such as the natural predators of the pests

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
biological control  
Control of pests by disrupting their ecological status, as through the use of organisms that are natural predators, parasites, or pathogens. Examples of biocontrol include the use of ladybugs to prey on aphids and scale insects and the treatment of turf with spores of the bacterium Bacillus popilliae, which cause milky disease in Japanese beetle larvae.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

biological control

the use of living organisms to control pests. A natural enemy such as a parasite, predator, or disease organism is introduced into the environment of a pest or, if already present, is encouraged to multiply and become more effective in reducing the number of pest organisms. Examples of biological control include the destruction of the citrophilus mealybug in California by two parasitic species of chalcid wasps imported from Australia, Coccophagus gurneyi and Tetracnemus pretiosus; the effective predation of an Australian ladybird beetle, or vedalia beetle (Rodolia cardinalis), on the cottony cushion scale in California; the limiting of the proliferation of the European rabbit in Australia by introduction of myxoma virus (which causes the disease myxomatosis); the control of Japanese beetles by Bacillus popilliae, which causes milky disease; and the control of various larvae that attack food crops in home gardens by Bacillus thuringiensis.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences
If biological control methods were relied upon or hand labor required, the yield would be smaller and the market price higher.
They're used as a convenient form of biological control, to cull insect pests without having to resort to chemical agents.
Two previously introduced biological control agents became established but are not providing sufficient control.
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