This document discusses crop protection from pest insects. It notes that insects can directly damage crops by consuming plant material and transmitting pathogens. The objective of entomologists is to modify the environment to prevent disease spread and crop damage from insects. This can be achieved through cultural methods like crop rotation, genetic methods like BT crops, or insecticides. However, prolonged insecticide use can lead to resistance, so insecticide resistance management through alternating insecticides with different modes of action is recommended.

1. Crop Protection Against
Pest
Insects
presented by
Ashutosh Kumar

2. Why Crop Protection

3. How Pests Insect Damage crops
Insect● Direct damage
1locust =2g plant material
per day
1 million =5000 human food
per day
insect can transmit several
pathogenic viruses, fungus and
bacteria which causes numerals
plant disease

4. Control of Pests Insect Damage
• The objective of Entomologist was primarily to
develop and introduce modification into the
environment in such a ways that disease will not
be spread by insect and crops will not be damage
by them
BUT HOW ?

5. Methods of● Cultural● Genetic
Crop
rotation
parasites BT crops Insecticid
es

6. Insecticides by mode of entry

7. Insecticides By Mode of Action

8. Problems with Insecticides
Prolong use of an insecticide makes the insect
resistant.

9. Insecticide Resistance Management
• Alternation, sequences or rotation of
insecticides from groups with
different modes of action can provide
an effective approach to IRM in cases
where resistance is the result of
altered target sites