Entomology - Chicago High School for Agricultural Sciences

Entomology - Chicago High School for Agricultural Sciences

Entomology Original PowerPoint by Mark Morgan Modified by Georgia Agriculture Education Curriculum Office What is Entomology?

- the branch of zoology that deals with the study of insects On average there are more than 750,000 species of insects that have been identified worldwide.

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

Classification of insects: Kingdom Phyla Class Order Family Genus

Species 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. 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 Contd

Thysanoptera- thrips Coleoptera- which is the largest group of the insect orders this has beetles How are insects grouped? by the way they feed on

plants by their mouth parts Six Mouth Parts Sponging Rasping- sucking Siphoning Chewing-lapping

Chewing Piercing- sucking Insects have no internal skeleton and they rely on their hard outer coating, exoskeleton, which protects their inner organs and supports

their body. Parts of an Insect Head Thorax Abdomen Head Has a pair of

compound eye and two sensory appendages called antennae Thorax is divided into three segments from which are attached three

pairs of legs Abdomen is attached to the thorax which will contain more segments

Life Cycles Incomplete Metamorphosis Complete Metamorphosis Incomplete Metamorphosis

Eggs to Early nymph (no wings) to late nymph (wings developing) Goes to Adult Complete Metamorphosis

Eggs to Larva to Pupa to Adult

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

The larva matures and will pass through the pupa stages which is usually a relatively dormant stage. 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 Integrated Pest

Management Cultural methods Insect diseases and predators Pheromones Release of sterile males Insect resistant plants varieties

Find specimens for identification of the following pests of greenhouse crops:

Mealybugs Spider Mites Scale Whiteflies Aphids Termites

Thrips

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