1. Entomology

2. Entomology What is Entomology?
It is the study of insects. Insects are always around us. Scientists called entomologist spend most of their time studying these insects

3. Entomology
What is the average amount of insects that are on the earths surface.
There are more than 750,000 species of insects which have been identified
There is about 2,000,000 species that have not been identified

4. Entomology Are all insects harmful to humans?
No, There is about 10,000 that are harmful to humans.

5. Entomology Are insects good or bad?
In history we have seen both sides of insects.
The bad side is the destructive ways of mowing down crops or fields.

6. Entomology
Did anyone read or hear about the Armyworm problem this spring?
Explain what happened?

7. Entomology Some more problems with insects have been?
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

8. Entomology
Cont….
Digging of the panama Canal have been hindered by insects
Started by the French in 1880 and abandoned because of workers dieing caused by malaria and yellow fever
Which this was carried around by mosquitoes

9. Entomology Did you know?
That the discovery of America was indirectly tied to the larvae of a moth.
This moth feeds on particular trees of the mulberry family

10. Entomology
These moths spun cocoons of long and smooth fibers to create a cloth called silk.
This cloth during the Middle Ages was a high demand or market for this.
Columbus was looking for a passage way to the eastern countries when he ran into America.

11. Entomology
On page 316.
There is a statue of this insect which is located in Enterprise Alabama.
This area depends on cotton production

12. Entomology Around Alabama
Crops that mostly grow are cotton but the invasion of the boll weevil destroyed the crops and a guy named George Washington Carver developed many uses for other crops that would grow in that area.

13. Entomology Some of those crops are : Peanuts
Which came to be more profitable that the cotton

14. Entomology Why do people eat insects?
Some cultures will eat insects for food.
Termite larva are considered to be delicious by some people who live in the tropics.

15. Entomology Classification of insects:
There are different levels of classifying insects:
Kingdom
Phyla
Class
Order
Family
Genus
Species

16. Entomology 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

17. Entomology Here are 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

18. Entomology Cont… Thysanoptera- thrips
Coleoptera- which is the largest group of the insect orders this has beetles

19. Entomology How are insects grouped?
They are grouped by the way they feed on plants. So they are grouped by their mouth parts.

20. Entomology There are six different mouth parts Sponging
Rasping- sucking
Siphoning
Chewing-lapping
Chewing
Piercing- sucking

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

22. Entomology What is the exoskeleton composed of ?
non cellular layer compose of a material called chitin which is secreted by an inner layer of cells. Chitin is coated with a waxy layer that helps insects retain fluid content of the body

23. Entomology Parts of an insect? There are three parts to any insect
They are
Head
Thorax
Abdomen

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

25. Entomology
Thorax
It is divided into three segments from which are attached three pairs of legs

26. Entomology Abdomen It is attached to the thorax
which will contain more segments

27. Entomology
There are two different life cycles that an insect can go through and they are:
Incomplete Metamorphosis
Complete Metamorphosis

28. Entomology Incomplete Metamorphosis Goes from Adult
to late nymph(wings developing)
to Early nymph (no wings)
Eggs

29. Entomology
Complete Metamorphosis
Adult to
Pupa to
Larva to
Eggs to

30. Entomology What is a larva?
It is when the young insect has soft tubular body and looks very much like a worm

31. Entomology What is a pupa stage?
It is when the larva matures and will pass throw the pupa stages which is usually a relatively dormant stage.

32. Entomology Phytophagous insects-
phyto means plant and phagous means eating. Whenever a plant is eaten on it is damaged in terms of growth and productivity

33. Entomology Parasitism-
is a relationship that is beneficial to one animal and harmful to the other.

34. Entomology
What is DDT?
This is a chemical that was discovered by German name Othmar Zeidler in 1874
It is a chemical to cut down on the number of insects in a given area.
Example mosquitoes in the tropics

35. Entomology Integrated pest management uses Cultural methods
Insect diseases and predators
Pheromones
Release of sterile males
Insect resistant plants varieties

36. Entomology
Project:
You will be given a copy of some insects you will then make flash cards with the insect on a card. You will need to color you insects by the description that it gives you. So you might want to bring in color pencils. You will then have time in class to study and make cards.

37. Entomology On these cards One side will have insect picture
Second side will have what it will damage and what it will look like
Time of attack
Description of insect