Whenever the population of any insect species increases significantly, so as it causes appreciable economic loss, is known as pest. Pest control is important as they cause heavy economic loss.

1. Insect Pest and their control procedures
Presented by-
Jahnabi Silponia
MSc 4th Semester
Kumaun University

2. Contents-
 Pests
 Reasons for the origin of pest
 Types of pests
 Pest control procedures
1. Primary Control
2. Chemical Control
3. Biological control
4. Autocidal control
5. Integrated pest management (IPM)
• Importance of pest control
• References

3. Pests
 Whenever the population of any insect species
increases significantly, so as it causes appreciable
economic loss, is known as pest.
 The pest can be monophagous (e.g. Human head
louse), Oligophagous or Polyphagous (e.g.
termites, grasshoppers, locusts etc.

4. Reasons for the origin of pest
 Change from monoculture to mixculture causes polyphagy
among the pests.
 Change from discontinuous cropping to continuous
cropping.
 Creation of ‘new soil’ invites exotic pest in the cropping
area.
 Removal of geographical barriers helps in spreading the
pest in large area.
 Loss of predaceous animals and birds causing loss of
natural check on a pest population.

5. Types of pests-
a) Key Pest- Serious, perinnial, persistent species. The
pest population usually remains above economic
level. E.g. Cotton bollworms
b) Occasional pest- Appear only in certain regions
and at a certain time. E.g. Jassids, Aphids
c) Migrant pest- Not residential and appear for a short
period due to migration. E.g. locusts
d) Potential pest- Cause no significant damage. E.g.
red banded leaf roller

6. Pest control procedures
1. Primary Control
2. Chemical Control
3. Biological Control
4. Autocidal Control
5. Integrated Pest Management (IPM)

7. 1. Primary Control- These are traditional, simple, safe
and comparatively cheaper than other methods. These
are usually preventive and indirect. For example- by
hand Picking, clean cultivation, crop rotation, using
resistant varieties of seed, cultivating soil etc.
2. Chemical Control- It is done by using insecticides,
attractants, repellants, synergists etc. By using
insecticides we can immediately decrease the pest
population but heavy use of it causes pollution in the
environment. It also damages useful species such as
pollinators, wildlife etc.

8. 3. Biological control- It is done by using other living
organisms. For example- using predators, parasitoid insects,
birds and some mammals.
4. Autocidal Control- It involves an employment of an
organism of one or both sex to destroy the members of the
same species. It has 3 techniques-
a. The sterile-male technique
b. The genetic technique
c. The pheromonal technique

9. 5. Integrated Pest Management (IPM):- IPM includes the
use of mechanical, biological, chemical agencies along with the
application of pheromones, hormones, antifeedants and
chemosterilants.
For the safe and successful operation against pest
population, IPM is necessary as it has less side effect and
doesn’t cause environmental pollution like chemical measure
do.

10. Importance of pest control
 To increase production in Agriculture
 To reduce different diseases

11. References
 Tembhare D. B., Modern entomology, 2nd Revised &
Enlarged edition

12. Thank you