Lifecycles Insect Internal Anatomy Dr. Natalie Hummel, LSU AgCenter Department of Entomology E-mail:  [email_address] 9:...
Hemi-metabolous Hemi = partial -metabolous = change Incomplete development Larva looks similar to adult Egg Nymph Adult
 
Chinch Bug J. Saichuk Aphids – a variation on this… Amorochrous dubius Rice Stink Bug J. Saichuk
 
 
 
Holo-metabolous Holo = complete -metabolous = change Complete development Larva looks different from adult Rice Water Weev...
 
Colaspis Rice water weevil J. Saichuk J. Saichuk SARM Skippers J. Saichuk J. Saichuk J. Saichuk Fall  Armyworm Rice Leafmi...
J. Saichuk J. Saichuk
R. Riggio
R. Riggio Feeding site Head
J. Saichuk J. Saichuk Puparia
 
 
A. Meszaros
J. Saichuk
Internal  Anatomy
The Nervous System Allows the insect to interact with the environment Figure source Peng, UC Dacvis
The Brain <ul><li>Processes information </li></ul><ul><li>Protocerebrum </li></ul><ul><ul><li>Vision </li></ul></ul><ul><l...
How do Insects Sense the Environment? Tarsal receptors  are activated Action  potential  occurs Message is  sent to brain ...
<ul><li>Circulates blood & hormones </li></ul><ul><li>Hemolymph </li></ul><ul><ul><li>Plasma ~ blood </li></ul></ul><ul><u...
Figure from Chapman, 1998
Endocrine System -  Hormones <ul><li>Growth (molting) </li></ul><ul><li>Reproduction </li></ul><ul><li>Feeding </li></ul><...
Reproductive tract http://images.google.com/imgres?imgurl=http://www.entomology.umn.edu/cues/4015/morpology/repro.jpg&imgr...
Digestive tract http://www.earthlife.net/insects/images/anatomy/guts.gif
The Big Picture –  Endocrine system Figure source Peng, UC Dacvis
The Insect Tracheal System <ul><li>Oxygen & waste products to & from each cell </li></ul><ul><li>Tracheal system </li></ul...
Figure Snodgrass, 1935
http://www.nature.com/nrg/journal/v1/n3/images/nrg1200-218a-f4.jpg
References <ul><li>Chapman, R.F. 1998.  The Insects: Structure and Function.  Cambridge University Press. NY, NY USA. </li...
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Lifecycles And Internal Anatomy Hummel

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Dr. Natalie Hummel, LSU AgCenter Department of Entomology

* Lifecycles
* Insect internal anatomy.

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  • Hormone: An organic chemical Produced in epithelial or neuroendocrine gland Released in low concentrations Acts remotely from site of production Chemical mediator (hormone vs. pheromone)
  • http://bugs.bio.usyd.edu.au/learning/resources/Entomology/images/Topics/intAnatomy/femaleReproSystem.gif
  • Lifecycles And Internal Anatomy Hummel

    1. 1.   Lifecycles Insect Internal Anatomy Dr. Natalie Hummel, LSU AgCenter Department of Entomology E-mail: [email_address] 9:45 to 10:15
    2. 2. Hemi-metabolous Hemi = partial -metabolous = change Incomplete development Larva looks similar to adult Egg Nymph Adult
    3. 4. Chinch Bug J. Saichuk Aphids – a variation on this… Amorochrous dubius Rice Stink Bug J. Saichuk
    4. 8. Holo-metabolous Holo = complete -metabolous = change Complete development Larva looks different from adult Rice Water Weevil Egg Larva Adult Pupa
    5. 10. Colaspis Rice water weevil J. Saichuk J. Saichuk SARM Skippers J. Saichuk J. Saichuk J. Saichuk Fall Armyworm Rice Leafminer J. Saichuk J. Saichuk Rice Levee Bill Bug Rice Seed Midge J. Saichuk
    6. 11. J. Saichuk J. Saichuk
    7. 12. R. Riggio
    8. 13. R. Riggio Feeding site Head
    9. 14. J. Saichuk J. Saichuk Puparia
    10. 17. A. Meszaros
    11. 18. J. Saichuk
    12. 19. Internal Anatomy
    13. 20. The Nervous System Allows the insect to interact with the environment Figure source Peng, UC Dacvis
    14. 21. The Brain <ul><li>Processes information </li></ul><ul><li>Protocerebrum </li></ul><ul><ul><li>Vision </li></ul></ul><ul><li>Deutocerebrum </li></ul><ul><ul><li>Olfaction </li></ul></ul><ul><li>Tritocerebrum </li></ul><ul><ul><li>Feeding </li></ul></ul>Figure source Chapman, 1998
    15. 22. How do Insects Sense the Environment? Tarsal receptors are activated Action potential occurs Message is sent to brain Feeding commences Figure source Peng, UC Dacvis
    16. 23. <ul><li>Circulates blood & hormones </li></ul><ul><li>Hemolymph </li></ul><ul><ul><li>Plasma ~ blood </li></ul></ul><ul><ul><li>Hemocytes ~ blood cells </li></ul></ul><ul><ul><li>Trehalose ~ blood sugar </li></ul></ul><ul><li>Pump (heart & dorsal aorta) </li></ul><ul><li>Diaphrams (Dorsal & Ventral ) </li></ul><ul><li>Neurohormones control </li></ul>The Insect Circulatory System Figure from Chapman, 1998
    17. 24. Figure from Chapman, 1998
    18. 25. Endocrine System - Hormones <ul><li>Growth (molting) </li></ul><ul><li>Reproduction </li></ul><ul><li>Feeding </li></ul><ul><li>Mating </li></ul>trw.umbc.edu/~vergil/Pix/insects.html trw.umbc.edu/~vergil/Pix/insects.html
    19. 26. Reproductive tract http://images.google.com/imgres?imgurl=http://www.entomology.umn.edu/cues/4015/morpology/repro.jpg&imgrefurl=http://www.entomology.umn.edu/cues/4015/morpology/&usg=__JKdknStXraJP7-iF8w7zM5yjwS0=&h=375&w=594&sz=73&hl=en&start=6&sig2=RCZAkgjMqgh1q3MOzNewXA&um=1&itbs=1&tbnid=FFA3R1-4npnjNM:&tbnh=85&tbnw=135&prev=/images%3Fq%3Dinsect%2Breproductive%2Btract%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26sa%3DG%26rls%3Dorg.mozilla:en-US:official%26tbs%3Disch:1&ei=t6aGS9KhAaWKNbmozfAL
    20. 27. Digestive tract http://www.earthlife.net/insects/images/anatomy/guts.gif
    21. 28. The Big Picture – Endocrine system Figure source Peng, UC Dacvis
    22. 29. The Insect Tracheal System <ul><li>Oxygen & waste products to & from each cell </li></ul><ul><li>Tracheal system </li></ul><ul><ul><li>Spiracles </li></ul></ul><ul><ul><li>Trachea </li></ul></ul><ul><ul><li>Taenidia </li></ul></ul><ul><ul><li>Tracheoles </li></ul></ul><ul><ul><li>Tracheolar cells </li></ul></ul>Figure Snodgrass, 1935
    23. 30. Figure Snodgrass, 1935
    24. 31. http://www.nature.com/nrg/journal/v1/n3/images/nrg1200-218a-f4.jpg
    25. 32. References <ul><li>Chapman, R.F. 1998. The Insects: Structure and Function. Cambridge University Press. NY, NY USA. </li></ul><ul><li>Snodgrass, 1935. Principles of Insect Morphology </li></ul><ul><li>Online resources, as cited in slides. </li></ul><ul><li>Peng, C.Y.S. Insect Physiology Lab Manual. </li></ul>
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