Microbial insecticides are those microorganisms or their products that are capable of attacking and killing pest insects. This may be considered to be an aspect of biological control, but when one is dealing with the products of such microbes the control may be termed chemical.

1. MICROBIAL INSECTICIDES
PRESENTED BY;
LOKESHWARI B
1ST M.Sc. MICROBIOLOGY
SACRED HEART COLLEGE,(AUTONOMOUS)
TIRUPATTUR

2. SYNOPSIS
 INRODUCTION
 CLASSIFICATION OF MICROBES
 HISTORY OF INSECTICIDES
 CHARACTERISTICS
 ADVANTAGES
 DIS ADVANTAGES
 PRECAUTIONS
 CONCLUSION

3. INTRODUCTION
 Insects are the group of organisms that affects humans.
 Population of insects is larger than 750000 species.
 Insects usually causes damage to crop and results in
humans & animal diseases.
 Used to kill insects.
 They are also called Entomopathogenic insecticides /
insects pathogens.
 Entomo – Insects, Pathogens – causing diseases

4.  Comprised of living organisms such as Bacteria,
Fungi, Virus, Protozoa etc…
 Uses toxic metabolites to destroy and prevent the
growth of pests
 Most commonly used insecticides are
organophosphates, pyrethroids, carbamates
 Bacillus thuringiensis – widely used insecticide

5. 1. BACTERIA
 About 90 species of bacteria are pathogenic
 Bacillus thuringiensis is a widely used insecticide that was
discovered in the year 1902
 Bt is a spore forming and Gram positive bacteria
 It produces toxins or crystal proteins that kills pathogens
 Commercially produced bacteria
 It’s a sub species and a specific strains of Bt

6. 2. FUNGI
 More than 750 species known to infect insects
 Usually causes diseases
 They attacks insects through cuticle
 Beauveria bassiana is a widely used insecticide in fungi
and a variety of Arthropods.
 Environmental conditions, temperature, PH, humidity are
maintained for further fungal treatments. a

7. 3. VIRUS
 Virus are also called as insect virus.
 Helps in diagnosing the plants which are infected with
virus
 Large scale production occurs both in IN VITRO & IN
VIVO

8.  Baculo virus is widely used insecticide in virus
 It’s a rod shape.
 Double stranded DNA virus
 Kills large number of invertebrate organisms.
 Slowly kills the pests by viral insecticides
 Several genes are expressed in Baculo virus

9. 4. PROTOZOA
 Single cell organisms
 Some of the protozoa organisms are parasites and kills
insects
 Organisms are effective in immature stage
 Nosema locustae is a widely used insecticide in protozoa
 Used as Control of Grasshopper in few products
 Used in the small - scale industries (Yield for gardens &
yards)

10.  Grasshoppers are the strong fliers and they can move long
distance.
 Some of the insecticides are active – grows – replicate in
digestive system – kills insects (GRASSHOPPER)

11. HISTORY OF INSECTICIDES
In 1948 an Actinomycetes was isolated at the kitasato
institute from a soil sample collected at kawana, Japan.
The families of compounds were finally characterized by
team at Merck in 1978.
In 2002, kitasato university and at the kitasato institute,
proposed that Streptomyces avermectinius.

12. In the 17th century Nicotine sulfate was extracted from
Tobacco leaves – Insecticides
In 19th century two natural pesticides were introduced
Before 4500 years thy used Sulfur compounds to control
insects and mites

13. NEGATIVE ASPECTS
• Chemicals pesticides cause more effective reduction of insect population and
better crop protection
• Viral pesticides required more involved monitoring system.
• Number of application in a particular area is more than chemical pesticides.
• Viral insecticides cannot be stored for a longer period of incubation.
• Producers are more comfortable with the use of chemical insecticides.

14. CHARACTERISTICS
 Morphology
 Gram reaction
 Nutritional classifications
 Cell wall, lipid, cell inclusion and storage products
 Pigments
 Utilization of Nitrogen source and Sulphur source
 Fermentation products
 Temperature and PH

15. ADVANTAGES
 Keeps food adorable
 Prevent insects and water borne transmission diseases
 Helps farmers to grow more crops in the same land
 Increases the economical growth of a country
 Also helps in preventing insects, rodents and viruses at
home office etc...
 Less toxic to environment

16. DIS ADVANTAGES
 Impact on human health
 Negative effect on other living species
 Environmental pollution
 Genetic defects
 Affects pollination
 Crops contaminated with harmful substances
 Reduces the availability of crops

17. PRECAUTIONS
 Label the directions and mark them clearly
 Avoid spilling , leaks , and contamination of clothing
 Wear gloves , long sleeves , pants , shirts
 Wash hands immediately after using insecticides
 Keep products in safer places
 Wear full protective gear
 Take a bath or shower at the end of the working day
 Never eat, drink , smoke while using insecticides

18. CONCLUSION
 Task of controlling pest populations
 Health and environmental effects is controlled
 Most synthetic and natural pesticides are susceptible
 Resistance towards insects decreases
 Economic benefits are high
 Reduces costs of insecticides
 Micro organisms provides pest control system management.
 Only viable solution for the future is Integrated pest

19. THANK YOU