Biological control is the use of living organisms to control
pests and weeds. It is therefore a form of population management.
The organisms controlled are noxious in that they consume
useful plants or plant products, attack livestock, inter-<
fere with marl's pleasurç 'or affect man's health. In nature,
lions feed on zebras or antelops and yet both the eater and
the eaten seldom decline in number. Clearly, a form of biological
control exists in nature to reduce competition because
if the population of the zebras and antelopes were to explode,
there would be scarcity of grass. Biological control therefore
is nature's secret of check and balance of population growth
of living things.