21. What is biological control?

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Biological control is a method to
control the of animal,
microorganism or populations.
Biological control isbased the
knowledge of inharmonious ()
ecological interactions between species.
such knowledge a parasite,
or predator species is
in an ecosystem in to
attain reduction of population of
another species which it has
inharmonious interaction. The
biological control the
advantage of substituting use of
pesticides and toxic chemical
products in control of plagues and
. It however should be
with caution under serious
study to avoid harmful
disequilibrium.
A kind of control of some
species be done by the
of previously sterilized males, do
not generate offspring.