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Journal

Journal. Suppose a virus killed off all of the insects on the planet. Predict how your life would be different. Common Georgia Insects. Common Georgia Insects. Crickets: male vs. female shown Camel crickets Mole crickets. Common Georgian Insects. Hercules Beetle

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Journal

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  1. Journal • Suppose a virus killed off all of the insects on the planet. Predict how your life would be different.

  2. Common Georgia Insects

  3. Common Georgia Insects • Crickets: male vs. female shown • Camel crickets • Mole crickets

  4. Common Georgian Insects • Hercules Beetle • Large green with brown spots • Male has horn • Largest beetle in North America

  5. Common Georgia Insects • Luna Moth • Locally endangered due to pollution • Males have more feathery antenna to pick up females pheromones.

  6. Common Georgia Insects • Kudzu bug • Not that common • Invasive insect • Eats kudzu (good) but starting to eat soybean crop (bad) • Gives off stinky smell

  7. Common Georgia Insects • Cicadas • Live underground for up to 17 years • Come out in masses • Leave husk on tree at final molt • Make “summer noise” Cicadas: the familiar sound of summer - CBS News Video

  8. Common Georgia Insects • Velvet Ants (aka Cow killers) • Actually female wasps • Males have wings • VERY PAINFUL STING

  9. PHEROMONES • Sex- excite or attract opposite sex • Trailing- laid down by foraging insects to help other members of colony find food. • Alarm- warn others of danger • Caste regulating- used by social insects to control the development of certain individuals in a colony.

  10. SOCIAL INSECTS Ants, termites, most bees & wasps Traits of social insects • Parental care of young • Several generations present in same location • Division of labor

  11. DIVISION OF LABOR • Reproductive caste • Queen- • produces eggs to maintain colony. • Regulates sex of offspring • Parthenogenesis • Unfertilized eggs- males • Fertilized eggs- females

  12. Queen termite

  13. Division of Labor b. Drones- mate with new queens

  14. Division of Labor • Worker caste • Sisters, all daughters of queen • Care for the eggs, larvae, queen & drones. • Forage for food • Maintain the nest • Workers have gland in head that secretes royal jelly. • This pheromone-laced liquid determines the larvae’s roll in the colony. • Future workers receive jelly for 1st3 days. • Future queens receive jelly throughout larval stage.

  15. Division of Labor f. Soldiers- defend the nest • Bees & wasps do not have soldier insects.

  16. Inside a Termite Mound • Mound is made of soil, termite saliva, and dung. • Top has chimneys w/tunnels that draft hot air out of mound. • Cool air enters near bottom of nest. This is also where termites enter & exit. • Termites live in bottom of nest underground • Chambers for storing wood & growing fungus (food) underground

  17. Other Insect Behaviors • ANT SLAVERY- • Some ant species invade others nest & steal larvae. They take them back to the nest where they become workers. • ANT FARMING- • Some will “herd” aphids & protect them from predators. Aphids supply sweet liquid- honey dew which ants eat. • Leaf cutter ants collect plants, compost it, and use it to grow fungus which they eat.

  18. Paurometabolus Metamorphosis Incomplete metamorphosis • Egg • Nymph- look like small adults • Lack reproductive organs • Lack wings 3. Adults- after several molts, reproductive organs & wings are grown.

  19. Holometabolus metamorphosis Complete metamorphosis • Egg • Larvae- wormlike (grubs- beetle larvae) • No reproductive organs • No wings • Must eat constantly to store enough energy for pupa stage • Pupa- inactive stage • May be surrounded by cocoon (moths). • Body is undergoing radical change. • Adult- emerges w/ reproductive organs & wings.

  20. ECONOMIC/ENVIRONMENTAL SIGNIFICANCE

  21. The reproductive males in a social insect colony are called? a. Drones b. Workers c. nymphs • Immature insects lack reproductive organs & ___. • Mouths b. Wings c. Respiratory organs Use the diagrams below to answer questions 3-5. • Which organism is the nymph? • Which organism is the pupa? • Which of these is holometabolous metamorphosis? C A B D E

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