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Entomology

Entomology. Modified by Georgia Agricultural Education Curriculum Office. July, 2002. Entomology . What is Entomology? Entomology is the study of insects. Insects are always around us. Scientists called entomologist spend most of their time studying insects. Entomology .

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Entomology

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  1. Entomology Modified by Georgia Agricultural Education Curriculum Office July, 2002

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

  3. Entomology • What is the average amount of insects that are on the earth’s surface? • More than 750,000 species of insects have been identified.

  4. Entomology • Are all insects harmful to humans? • No. Only about 10,000 are harmful to humans.

  5. Entomology • Classification of insects: • Different levels of classifying insects: • Kingdom • Phyla • Class • Order • Family • Genus • Species

  6. Entomology • The highest classification level is the kingdom. • The most specific classification is the species level. • Organisms are classified by genus and species. • This is called a binomial nomenclature.

  7. Entomology • Six orders of insects: • Orthoptera - grasshopper and locust • Hemiptera -leaf hoppers and plant bugs • Lepidoptera – moths and butterflies • Homoptera - aphids

  8. Entomology • Cont… • Thysanoptera - thrips • Coleoptera - beetles (the largest group of the insect orders)

  9. Entomology • How are insects grouped? • Insects are grouped by their mouth parts.

  10. Entomology • Six different mouth parts • Sponging • Rasping- sucking • Siphoning • Chewing-lapping • Chewing • Piercing- sucking

  11. Entomology • Insects have no internal skeleton. They rely on a hard outer coating called exoskeleton to protect the inner organs and support the body.

  12. Entomology • What are the parts of an insect? • Three parts to an insect • Head • Thorax • Abdomen

  13. Entomology • Head • The head has a pair of compound eyes and two sensory appendages called antennae.

  14. Entomology • Thorax • The thorax is divided into three segments. Three pairs of legs are attached to the thorax.

  15. Entomology • Abdomen • The abdomen is attached to the thorax.

  16. Entomology • Insects will complete one of three different life cycles. • No Metamorphosis - no change • Incomplete Metamorphosis - gradual change • Complete Metamorphosis - complete change

  17. Entomology • Incomplete Metamorphosis • Egg • Early nymph (no wings) • Late nymph (wings developing) • Adult

  18. Entomology • Complete Metamorphosis • Egg • Larva • Pupa • Adult

  19. Entomology • What is a larva? • A larva is a young insect with a soft tubular body and looks very much like a worm.

  20. Entomology • What is a pupa? • The pupa stage is a dormant stage where the larva changes into an adult.

  21. Entomology • What are Phytophagous insects? • Phyto means plant and phagous means eating. Whenever a plant is eaten, it is damaged in terms of growth and productivity.

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