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Entomology

Entomology Original PowerPoint by Mark Morgan Modified by Georgia Agriculture Education Curriculum Office November 2005 What is Entomology? the branch of zoology that deals with the study of insects

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Entomology

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  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 • Chewing • 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

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