entomology. entomology what is entomology? what is entomology? it is the study of insects. insects...

EntomologyEntomology


What is Entomology?What is Entomology?

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


What is the average amount of What is the average amount of insects that are on the earths insects that are on the earths surface.surface.

There are more than 750,000 species of There are more than 750,000 species of insects which have been identifiedinsects which have been identified

There is about 2,000,000 species that There is about 2,000,000 species that have not been identifiedhave not been identified


Are all insects harmful to humans?Are all insects harmful to humans?

No, There is about 10,000 that are No, There is about 10,000 that are harmful to humans.harmful to humans.


Are insects good or bad?Are insects good or bad? In history we have seen both sides of In history we have seen both sides of

insects.insects. The bad side is the destructive ways The bad side is the destructive ways

of mowing down crops or fields.of mowing down crops or fields.


Did anyone read or hear about the Did anyone read or hear about the Armyworm problem this spring?Armyworm problem this spring?

Explain what happened?Explain what happened?


Some more problems with insects Some more problems with insects have been?have been? Deadly epidemics of the past have Deadly epidemics of the past have

been caused by diseased organisms been caused by diseased organisms carried by insects.carried by insects.

Example: bubonic plague epidemic Example: bubonic plague epidemic that wiped out the population of that wiped out the population of Europe in the 14 century was carried Europe in the 14 century was carried by fleas that infested rodentsby fleas that infested rodents


Cont….Cont…. Digging of the panama Canal have Digging of the panama Canal have

been hindered by insectsbeen hindered by insects Started by the French in 1880 and Started by the French in 1880 and

abandoned because of workers dieing abandoned because of workers dieing caused by malaria and yellow fevercaused by malaria and yellow fever

Which this was carried around by Which this was carried around by mosquitoesmosquitoes


Did you know?Did you know? That the discovery of America was That the discovery of America was

indirectly tied to the larvae of a indirectly tied to the larvae of a moth.moth.

This moth feeds on particular trees This moth feeds on particular trees of the mulberry familyof the mulberry family


These moths spun cocoons of long These moths spun cocoons of long and smooth fibers to create a cloth and smooth fibers to create a cloth called silk.called silk.

This cloth during the Middle Ages was This cloth during the Middle Ages was a high demand or market for this.a high demand or market for this.

Columbus was looking for a passage Columbus was looking for a passage way to the eastern countries when he way to the eastern countries when he ran into America.ran into America.


On page 316.On page 316. There is a statue of this insect There is a statue of this insect

which is located in Enterprise which is located in Enterprise Alabama.Alabama.

This area depends on cotton This area depends on cotton productionproduction


Around AlabamaAround Alabama Crops that mostly grow are cotton Crops that mostly grow are cotton

but the invasion of the boll weevil but the invasion of the boll weevil destroyed the crops and a guy destroyed the crops and a guy named George Washington Carver named George Washington Carver developed many uses for other developed many uses for other crops that would grow in that area.crops that would grow in that area.


Some of those crops are :Some of those crops are : PeanutsPeanuts

Which came to be more profitable that Which came to be more profitable that the cottonthe cotton


Why do people eat insects?Why do people eat insects? Some cultures will eat insects for Some cultures will eat insects for

food.food. Termite larva are considered to be Termite larva are considered to be

delicious by some people who live in the delicious by some people who live in the tropics.tropics.


Classification of insects:Classification of insects: There are different levels of There are different levels of

classifying insects:classifying insects:– KingdomKingdom– PhylaPhyla– ClassClass– OrderOrder– FamilyFamily– GenusGenus– SpeciesSpecies


The highest level is the KingdomThe highest level is the Kingdom The most specific is the species The most specific is the species

level.level. Organisms are usually classified by Organisms are usually classified by

the genus and species.the genus and species. This is called a binomial This is called a binomial

nomenclaturenomenclature


Here are six orders of insects:Here are six orders of insects:

Orthoptera- which includes the Orthoptera- which includes the grasshopper and locustgrasshopper and locust

Hemiptera which includes the true bugs Hemiptera which includes the true bugs such as leaf hoppers and plant bugs such as leaf hoppers and plant bugs

Lepidoptera – moths and butterfliesLepidoptera – moths and butterflies Homoptera- aphidsHomoptera- aphids


Cont…Cont… Thysanoptera- thripsThysanoptera- thrips Coleoptera- which is the largest Coleoptera- which is the largest

group of the insect orders this has group of the insect orders this has beetlesbeetles


How are insects grouped?How are insects grouped? They are grouped by the way they They are grouped by the way they

feed on plants. So they are feed on plants. So they are grouped by their mouth parts.grouped by their mouth parts.


There are six different mouth partsThere are six different mouth parts SpongingSponging Rasping- suckingRasping- sucking SiphoningSiphoning Chewing-lappingChewing-lapping ChewingChewing Piercing- suckingPiercing- sucking


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


What is the exoskeleton composed What is the exoskeleton composed of ?of ?

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


Parts of an insect?Parts of an insect? There are three parts to any insectThere are three parts to any insect They areThey are

HeadHead ThoraxThorax AbdomenAbdomen


HeadHead Has a pair of compound eye and two Has a pair of compound eye and two

sensory appendages called antennae.sensory appendages called antennae.


ThoraxThorax It is divided into three segments from It is divided into three segments from

which are attached three pairs of legswhich are attached three pairs of legs


AbdomenAbdomen It is attached to the thoraxIt is attached to the thorax which will contain more segmentswhich will contain more segments


There are two different life cycles There are two different life cycles that an insect can go through and that an insect can go through and they are:they are: Incomplete MetamorphosisIncomplete Metamorphosis Complete MetamorphosisComplete Metamorphosis


Incomplete MetamorphosisIncomplete Metamorphosis Goes from Adult Goes from Adult to late nymph(wings developing) to late nymph(wings developing) to Early nymph (no wings) to Early nymph (no wings) EggsEggs


Complete MetamorphosisComplete Metamorphosis Adult toAdult to Pupa toPupa to Larva toLarva to Eggs toEggs to


What is a larva?What is a larva? It is when the young insect has It is when the young insect has

soft tubular body and looks very soft tubular body and looks very much like a wormmuch like a worm


What is a pupa stage?What is a pupa stage? It is when the larva matures and It is when the larva matures and

will pass throw the pupa stages will pass throw the pupa stages which is usually a relatively which is usually a relatively dormant stage.dormant stage.


Phytophagous insects-Phytophagous insects- phyto means plant and phagous phyto means plant and phagous

means eating. Whenever a plant is means eating. Whenever a plant is eaten on it is damaged in terms of eaten on it is damaged in terms of growth and productivitygrowth and productivity


Parasitism-Parasitism- is a relationship that is beneficial is a relationship that is beneficial

to one animal and harmful to the to one animal and harmful to the other.other.


What is DDT?What is DDT? This is a chemical that was This is a chemical that was

discovered by German name Othmar discovered by German name Othmar Zeidler in 1874Zeidler in 1874

It is a chemical to cut down on the It is a chemical to cut down on the number of insects in a given area.number of insects in a given area.

Example mosquitoes in the tropicsExample mosquitoes in the tropics


Integrated pest management usesIntegrated pest management uses Cultural methodsCultural methods Insect diseases and predatorsInsect diseases and predators PheromonesPheromones Release of sterile malesRelease of sterile males Insect resistant plants varietiesInsect resistant plants varieties


Project:Project: You will be given a copy of some You will be given a copy of some

insects you will then make flash cards insects you will then make flash cards with the insect on a card. You will with the insect on a card. You will need to color you insects by the need to color you insects by the description that it gives you. So you description that it gives you. So you might want to bring in color pencils. might want to bring in color pencils. You will then have time in class to You will then have time in class to study and make cards. study and make cards.


On these cardsOn these cards One side will have insect pictureOne side will have insect picture Second side will have what it will Second side will have what it will

damage and what it will look likedamage and what it will look like Time of attackTime of attack Description of insectDescription of insect

entomology. entomology what is entomology? what is entomology? it is the study of insects. insects...

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