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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 …

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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  • 1. Immature Insects Rick Story, Department of Entomology
  • 2.
    • Types of Insect Development
    • Incomplete (egg nymph or larva adult)
    • Complete (egg larva pupa adult)
  • 3. Insect Growth - external skeleton -grows with successive molts -each stage is an instar -typically 5-7 instars for larval growth
  • 4. Insect Metamorphosis - change in body form from immature to adult stage
  • 5.
    • Incomplete Metamorphosis
    • Immatures look like adults except:
    • Smaller
    • Lack wings
    • Lack genitalia
  • 6.  
  • 7.
    • Incomplete Metamorphosis
    • Immatures look like adults:
    • Same mouthparts
    • Feed on same plants
    • Occur together with adults
    • Have compound eyes
  • 8.  
  • 9.  
  • 10.  
  • 11.  
  • 12.  
  • 13.  
  • 14. Complete Metamorphosis -immatures do not look like adults -have an inactive pupal stage for transformation
  • 15.
    • Complete Metamorphosis
    • Immatures unlike adults:
    • Different mouthparts
    • Different host plants
    • Do not typically occur together
    • Lack compound eyes
  • 16.  
  • 17.  
  • 18.  
  • 19. Identification of Immatures Incomplete development orders – characters similar for nymphs and adults Complete development orders- characters completely different
  • 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)
  • 21. Neuroptera - Larvae are predators, with well developed legs and an elongated body -sickle shaped mandibles with blood groove diagnostic character
  • 22.  
  • 23.  
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  • 25.  
  • 26.  
  • 27. Lepidoptera - Larvae (caterpillars) are plant feeding and have chewing mouthparts -caterpillar body form diagnostic (cylindrical body, thoracic legs well developed, abdominal prolegs present)
  • 28.  
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  • 30.  
  • 31.  
  • 32.  
  • 33.  
  • 34.  
  • 35.  
  • 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.
  • 37.  
  • 38.  
  • 39.  
  • 40.  
  • 41.  
  • 42.  
  • 43. Coleoptera - Larvae with chewing mouthparts, plant feeding or predators -Have well developed head capsule, thoracic legs present (usually), and lack abdominal legs
  • 44.  
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  • 50.  
  • 51.  
  • 52.  
  • 53.  
  • 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.
  • 55.  
  • 56.  
  • 57. Author: Rick Story
    • [email_address]

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