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Engineering HSC and IIT-JEE Mains and
advanced videos. Hello students today
will be studying chapter microbes in
human welfare in that well be studying
topic biocontrol agents when I say about
biocontrol agents bio means biology and
to control is to basically prevent pest
or insects which grow around the crops
and destroy the crops a simple example
of biocontrol agents dragonflies that
kills malaria parasite in this part
we'll be studying about all biocontrol
agents.
Biocontrol agents that variants
biocontrol agents and first one is
dragon plants which controls malarial
fallacy the second one is bachelors so
in Genesis which is present inside BT-
cotton or bachelors or in genesis
contton
whenever caterpillar or larva comes and
fields orchids bt cotton this beauty
toxin or frou toxin gets inside the body
of the organism and the cut of the
organism becomes paralyzed due to that
throw toxin and eventually that organism
or larvae for the caterpillar dies in
this process
now when bt cotton was made a process
for as genetic engineering Western apart
from genetically engineered cotton there
is bt cotton satchels available or there
is bt cotton toxin available which you
can take it in package and spray on your
firm's apart from protecting cotton
crops Bt toxin helps to product other
crops
it could be vegetables or some kinds of
other materials another kind of bio
control agent is trichoderma virus now
this trip whatever fungus is a kind of a
fungus which could be viral in nature in
some cases but basically the white
variety that is used is fungal variety
that is used to control certain viruses
with limit related to tomato another
kind of lastly Bakula virus now this
back in a virus is broad-spectrum
antibiotic or broad-spectrum
biofertilizers this baculovirus can kill
arthropods
insecticides and all other insects but
they do not cause any harm to plant body
or to any field crops okay it is a kind
of by control agent which is used by IPM
IPA means integrated pest management
when IPM uses it the major causes it
does not cause any harm to plants
animals or human being all falls into
the crop or the field but
kills all the unfilled microorganisms
viruses and attributes
baculovirus are the baile used by
control agents so let's study what
biocontrol agents are
biocontrol agents bacillus thuringiensis
or BT are used to control butterfly or
caterpillars but insects feed on bt
cotton or bacillus thuringiensis cotton
pro toxins causes death of the organism
basically vp toxin is engulfed by the
organism and this Bt toxin is converted
into pro toxin inside the cut of the
organism and eventually the organism
dies Geronimo's fungus is used to
control certain pathogens basically
tricking ama is used to control viruses
[Music]
vascular viruses they are excellent
viruses that attack insects and other
arthropods they never caused any harm to
plants animals birds or to the crops
they only kill certain viruses or
arthropods baculovirus is our narrow
spectrum by control agents they are
viruses which have great affinity
towards certain RNA viruses or harmful
RNA viruses they never cause any damage
to the plants or animals IPM that is
integrated pest management of India uses
Bakula viruses one large extent to kill
harmful organism in this part of the
chapter we studied about
biocontrol agents like bt cotton
tricking oma and battle of viruses and
what is their effect on plants humans
and how do they help plants in better
way and are beneficial as compared to
any other chemical means I hope you all
have understood about biocontrol agents
and their functions thank you
