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INDIRA GANDHI KRISHI VISHWAVIDYALAYA, RAIPUR (C.G)
COLLEGE OF AGRICULTURE, RAIPUR
SESSION- 2023-24
COURSE TITLE :- SOIL BIOLOGY AND BIOCHEMISTRY
COURSE NO. :- SOILS-506
COURSE CREDIT :- 3(2+1)
Submitted To
Dr. Dipti Mayee Dash
Department of Agricultural Microbiology
Submitted By
1. Jaya Verma
2. Shivangini Singh
3. Aerra Snehitha
1. Ankit Choudhary
2. Asumal Bhai Patel
3. Rahul
M.Sc. Agricultural Microbiology
Role of Microbes
in: Biocontrol
Understanding the Diverse Roles of Microorganism
Microbes
● Microbes are tiny living things that are
found all around us and are too small to be
seen by the naked eye.
● They Live in Water, soil, and in the air. The
human body is home to millions of these
microbes too, also called microorganisms.
● Some microbes make us sick, other are
important for our health.
What is Bio-Control?
Bio-control can be simply defined as the
application of one living organism to
control another.
Bio-control is a method of controlling
pests such as insects, mites, weeds and
plant diseases by using other organisms.
This process is also referred to a
biological control.
● Biocontrol is the use of biological methods for
controlling plant diseases and pest. E.g. Lady Bird
(Beetle) control Aphid. Dragon Flies control
mosquitoes.
● Chemical pesticides and insecticides kill both useful
and harmful organism and cause pollution.
● Biocontrol methods has no such problems.
Microbes as
Biocontrol Agents
Aphid
Lady Bird (Beetle)
Microbial Biocontrol Agents
Bacillus thuringiensis (Bt): To control butterfly
caterpillar.
The dried spores of Bt (available in sachets) are
mixed with water and sprayed on to vulnerable
plants such as brassicas and fruits trees. These are
eaten by the caterpillar. In their gut, the toxin is
released and the larvae got killed. The scientists
have introduced B. Thuringiensis toxin genes into
plants. E.g. Bt cotton.
Microbial Biocontrol Agents
● Trichoderma spp. (fungus):
These are free livings presents in the root
ecosystems. They control several plant pathogens.
● Baculoviruses (Especially genus
Nucleopolyherdro): Attacks insects and other
arthropods.
It is suitable for species-specific, narrow spectrum
insecticidal applications and desirable in IPM
(Integrated Pest Management) program to conserve
beneficial insects.
● Bio-fertilisers are organisms that enrich nutrient
quality of the soil. E.g. Bacteria, fungi,
cyanobacteria etc.
● Rhizobium (symbiotic bacteria in root nodules of
leguminous plants) fix atmospheric N2.
● Free-living bacteria in the (E.g. Azospirillum and
Azotobacter) enrich the nitrogen content of the
soil.
Microbes as
Biofertilizers
Microbes as Biofertilizers
The fungal symbiont performs the following:
● Absorb phosphorus from soil and passes the plant.
● Biofertilizers are organisms that enrich nutrient
quality of the soil. E.g. Bacteria, fungi,
cyanobacteria etc.
● Rhizobium (symbiotic bacteria in root nodules of
leguminous plants) fix atmospheric N2.
● Free-living bacteria in the soil (E.g. Azospirillum
and Azotobacter) enrich the nitrogen content of the
soil.
● Mycorrhiza: Symbiotic association of fungi (Genus
of Glomus) with plants. The fungus get food from
plant.
The fungal symbiont performs the following:
● Give resistance to root-borne pathogens and tolerance to
salinity and drought.
● Give overall increase in plant growth and development.
● Cyanobacteria (Blue green Algae): Autotrophic microbes.
They fix atmospheric nitrogen. E.g. Anabaena, Nostoc,
Oscillatoria etc. In paddy fields, Cyanobacteria serve as an
important biofertilizers
Microbes as
Biofertilizers
How Does Biological Control
Works
Advantages:
● The biological control agents are environmentally
friendly and cause no side effects.
● Decrease disease intensity.
● Safe for the users and the farming community.
● Provide natural long term immunity to crops and soil
● Play a key role in integrated management of diseases.
● Reduce undesirable effects from chemical pesticide.
● Easily available, easy to use and is effective throughout
the season.
Conclusion
● Biological control or Biocontrol is a
process of controlling pests such as
mites, insects, weeds and plant disease
using some other animals.
● Biological control agents offer and eco-
friendly and economic alternative to use
of toxic chemicals for control of various
parasites.
● Biological control can have side-effects
on biodiversity through attacks on non-
target species by any of the same
mechanisms, especially when a species
is introduced without through
understanding of the possible
consequences.

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ROLES OF MICROBES IN BIOCONTROL BY ANKIT CHOUDHARY.ppsx

  • 1. INDIRA GANDHI KRISHI VISHWAVIDYALAYA, RAIPUR (C.G) COLLEGE OF AGRICULTURE, RAIPUR SESSION- 2023-24 COURSE TITLE :- SOIL BIOLOGY AND BIOCHEMISTRY COURSE NO. :- SOILS-506 COURSE CREDIT :- 3(2+1)
  • 2. Submitted To Dr. Dipti Mayee Dash Department of Agricultural Microbiology Submitted By 1. Jaya Verma 2. Shivangini Singh 3. Aerra Snehitha 1. Ankit Choudhary 2. Asumal Bhai Patel 3. Rahul M.Sc. Agricultural Microbiology
  • 3. Role of Microbes in: Biocontrol Understanding the Diverse Roles of Microorganism
  • 4. Microbes ● Microbes are tiny living things that are found all around us and are too small to be seen by the naked eye. ● They Live in Water, soil, and in the air. The human body is home to millions of these microbes too, also called microorganisms. ● Some microbes make us sick, other are important for our health.
  • 5. What is Bio-Control? Bio-control can be simply defined as the application of one living organism to control another. Bio-control is a method of controlling pests such as insects, mites, weeds and plant diseases by using other organisms. This process is also referred to a biological control.
  • 6. ● Biocontrol is the use of biological methods for controlling plant diseases and pest. E.g. Lady Bird (Beetle) control Aphid. Dragon Flies control mosquitoes. ● Chemical pesticides and insecticides kill both useful and harmful organism and cause pollution. ● Biocontrol methods has no such problems. Microbes as Biocontrol Agents Aphid Lady Bird (Beetle)
  • 7. Microbial Biocontrol Agents Bacillus thuringiensis (Bt): To control butterfly caterpillar. The dried spores of Bt (available in sachets) are mixed with water and sprayed on to vulnerable plants such as brassicas and fruits trees. These are eaten by the caterpillar. In their gut, the toxin is released and the larvae got killed. The scientists have introduced B. Thuringiensis toxin genes into plants. E.g. Bt cotton.
  • 8. Microbial Biocontrol Agents ● Trichoderma spp. (fungus): These are free livings presents in the root ecosystems. They control several plant pathogens. ● Baculoviruses (Especially genus Nucleopolyherdro): Attacks insects and other arthropods. It is suitable for species-specific, narrow spectrum insecticidal applications and desirable in IPM (Integrated Pest Management) program to conserve beneficial insects.
  • 9. ● Bio-fertilisers are organisms that enrich nutrient quality of the soil. E.g. Bacteria, fungi, cyanobacteria etc. ● Rhizobium (symbiotic bacteria in root nodules of leguminous plants) fix atmospheric N2. ● Free-living bacteria in the (E.g. Azospirillum and Azotobacter) enrich the nitrogen content of the soil. Microbes as Biofertilizers
  • 10. Microbes as Biofertilizers The fungal symbiont performs the following: ● Absorb phosphorus from soil and passes the plant. ● Biofertilizers are organisms that enrich nutrient quality of the soil. E.g. Bacteria, fungi, cyanobacteria etc. ● Rhizobium (symbiotic bacteria in root nodules of leguminous plants) fix atmospheric N2. ● Free-living bacteria in the soil (E.g. Azospirillum and Azotobacter) enrich the nitrogen content of the soil. ● Mycorrhiza: Symbiotic association of fungi (Genus of Glomus) with plants. The fungus get food from plant.
  • 11. The fungal symbiont performs the following: ● Give resistance to root-borne pathogens and tolerance to salinity and drought. ● Give overall increase in plant growth and development. ● Cyanobacteria (Blue green Algae): Autotrophic microbes. They fix atmospheric nitrogen. E.g. Anabaena, Nostoc, Oscillatoria etc. In paddy fields, Cyanobacteria serve as an important biofertilizers Microbes as Biofertilizers
  • 12. How Does Biological Control Works Advantages: ● The biological control agents are environmentally friendly and cause no side effects. ● Decrease disease intensity. ● Safe for the users and the farming community. ● Provide natural long term immunity to crops and soil ● Play a key role in integrated management of diseases. ● Reduce undesirable effects from chemical pesticide. ● Easily available, easy to use and is effective throughout the season.
  • 13. Conclusion ● Biological control or Biocontrol is a process of controlling pests such as mites, insects, weeds and plant disease using some other animals. ● Biological control agents offer and eco- friendly and economic alternative to use of toxic chemicals for control of various parasites. ● Biological control can have side-effects on biodiversity through attacks on non- target species by any of the same mechanisms, especially when a species is introduced without through understanding of the possible consequences.