Immature Insects Rick Story, Department of Entomology
<ul><li>Types of Insect Development </li></ul><ul><li>Incomplete (egg  nymph or larva  adult) </li></ul><ul><li>Complete (...
Insect Growth - external skeleton -grows with successive molts -each stage is an instar -typically 5-7 instars for larval ...
Insect Metamorphosis - change in body form from immature   to adult stage
<ul><li>Incomplete Metamorphosis </li></ul><ul><li>Immatures look like adults except: </li></ul><ul><li>Smaller </li></ul>...
 
<ul><li>Incomplete Metamorphosis </li></ul><ul><li>Immatures look like adults: </li></ul><ul><li>Same mouthparts </li></ul...
 
 
 
 
 
 
Complete Metamorphosis -immatures do not look like adults -have an inactive pupal stage for  transformation
<ul><li>Complete Metamorphosis </li></ul><ul><li>Immatures unlike adults: </li></ul><ul><li>Different mouthparts </li></ul...
 
 
 
Identification of Immatures Incomplete development orders – characters similar for nymphs and adults Complete development ...
Main orders with complete development Neuroptera  : green + brown lacewings Lepidoptera  : caterpillars (moths) Hymenopter...
Neuroptera - Larvae are predators, with well developed legs and an elongated body -sickle shaped mandibles with blood groo...
 
 
 
 
 
Lepidoptera - Larvae (caterpillars) are plant feeding and have chewing mouthparts -caterpillar body form diagnostic (cylin...
 
 
 
 
 
 
 
 
Diptera - Larvae with variable feeding habits and chewing mouthparts -body with head capsule partially to completely reduc...
 
 
 
 
 
 
Coleoptera - Larvae with chewing mouthparts, plant feeding or predators -Have well developed head capsule, thoracic legs p...
 
 
 
 
 
 
 
 
 
 
Hymenoptera - sawflies: caterpillar body form (prolegs lack hooks), feed on foliage -bees, wasps, ants: grub-like body for...
 
 
Author: Rick Story <ul><li>[email_address] </li></ul>
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Story immatureinsects

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Story presentation on Immature insect identification - focusing on rice pests. Advanced rice entomology training at rice research station in Crowley, La on March 2, 2011

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Story immatureinsects

  1. 1. Immature Insects Rick Story, Department of Entomology
  2. 2. <ul><li>Types of Insect Development </li></ul><ul><li>Incomplete (egg nymph or larva adult) </li></ul><ul><li>Complete (egg larva pupa adult) </li></ul>
  3. 3. Insect Growth - external skeleton -grows with successive molts -each stage is an instar -typically 5-7 instars for larval growth
  4. 4. Insect Metamorphosis - change in body form from immature to adult stage
  5. 5. <ul><li>Incomplete Metamorphosis </li></ul><ul><li>Immatures look like adults except: </li></ul><ul><li>Smaller </li></ul><ul><li>Lack wings </li></ul><ul><li>Lack genitalia </li></ul>
  6. 7. <ul><li>Incomplete Metamorphosis </li></ul><ul><li>Immatures look like adults: </li></ul><ul><li>Same mouthparts </li></ul><ul><li>Feed on same plants </li></ul><ul><li>Occur together with adults </li></ul><ul><li>Have compound eyes </li></ul>
  7. 14. Complete Metamorphosis -immatures do not look like adults -have an inactive pupal stage for transformation
  8. 15. <ul><li>Complete Metamorphosis </li></ul><ul><li>Immatures unlike adults: </li></ul><ul><li>Different mouthparts </li></ul><ul><li>Different host plants </li></ul><ul><li>Do not typically occur together </li></ul><ul><li>Lack compound eyes </li></ul>
  9. 19. Identification of Immatures Incomplete development orders – characters similar for nymphs and adults Complete development orders- characters completely different
  10. 20. Main orders with complete development Neuroptera : green + brown lacewings Lepidoptera : caterpillars (moths) Hymenoptera : sawfly larvae, ants, bees, wasps Diptera : maggots (flies) Coleoptera : white grubs, weevils, wireworms (beetles)
  11. 21. Neuroptera - Larvae are predators, with well developed legs and an elongated body -sickle shaped mandibles with blood groove diagnostic character
  12. 27. Lepidoptera - Larvae (caterpillars) are plant feeding and have chewing mouthparts -caterpillar body form diagnostic (cylindrical body, thoracic legs well developed, abdominal prolegs present)
  13. 36. Diptera - Larvae with variable feeding habits and chewing mouthparts -body with head capsule partially to completely reduced, no thoracic legs, soft bodied, white, often occur in damp habitats.
  14. 43. Coleoptera - Larvae with chewing mouthparts, plant feeding or predators -Have well developed head capsule, thoracic legs present (usually), and lack abdominal legs
  15. 54. Hymenoptera - sawflies: caterpillar body form (prolegs lack hooks), feed on foliage -bees, wasps, ants: grub-like body form with well developed head capsule and no thoracic legs.
  16. 57. Author: Rick Story <ul><li>[email_address] </li></ul>

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