1. Entomology Original PowerPoint by Mark Morgan
Modified by Georgia Agriculture Education Curriculum Office
November 2005

2. What is Entomology?
the branch of zoology that deals with the study of insects

3. • On average there are more than 750,000 species of insects that have been identified worldwide.

4. There are only approximately 10,000 species of insects that are harmful to humans.

5. Problems
Deadly epidemics of the past have been caused by diseased organisms carried by insects.
Example: Bubonic Plague epidemic that wiped out the population of Europe in the 14 century was carried by fleas that infested rodents

6. Classification of insects:
Kingdom
Phyla
Class
Order
Family
Genus
Species

7. The highest level is the Kingdom
The most specific is the species level.
Organisms are usually classified by the genus and species.
This is called a binomial nomenclature.

8. Six orders of insects:
Orthoptera- which includes the grasshopper and locust
Hemiptera- which includes the true bugs such as leaf hoppers and plant bugs
Lepidoptera – moths and butterflies
Homoptera- aphids

9. Cont’d… Thysanoptera- thrips
Coleoptera- which is the largest group of the insect orders this has beetles

10. How are insects grouped?
by the way they feed on plants
by their mouth parts

11. Six Mouth Parts Sponging Rasping- sucking Siphoning Chewing-lapping
Piercing- sucking

12. Insects have no internal skeleton and they rely on their hard outer coating, exoskeleton, which protects their inner organs and supports their body.

13. Parts of an Insect
Head
Thorax
Abdomen

14. Head
Has a pair of compound eye and two sensory appendages called antennae

15. Thorax
is divided into three segments from which are attached three pairs of legs

16. Abdomen
is attached to the thorax
which will contain more segments

17. Life Cycles
Incomplete Metamorphosis
Complete Metamorphosis

18. Incomplete Metamorphosis
Eggs
to Early nymph (no wings)
to late nymph (wings developing)
Goes to Adult

19. Complete Metamorphosis
Eggs to
Larva to
Pupa to
Adult

20. What Is a Larva?
It is when the young insect has soft tubular body and looks very much like a worm

21. What Is the Pupa Stage?
The larva matures and will pass through the pupa stages which is usually a relatively dormant stage.

22. What is DDT?
This is a chemical that was discovered by German name Othmar Zeidler in 1874.
It is a chemical used to reduce the number of insects in a given area.
Example: mosquitoes in the tropics

23. Integrated Pest Management
Cultural methods
Insect diseases and predators
Pheromones
Release of sterile males
Insect resistant plants varieties