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INSECT ECOLOGY

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Title: INSECT ECOLOGY


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INSECT ECOLOGY
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  • focus on interaction of pop diff sp of insects
    with each other and with plants, animal
    physical factors
  • trophic relationship feeding relationship
  • herbivorous
  • carnivorous meat eating i)predators
    ii) parasitoid
  • detritivores

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HERBIVOROUS
  • Most successful insect
  • Eat plant
  • Many part of plants
  • Way of eating
  • i) chewing plants part grasshopper, stick
    insects, larvae of butterfly/moths, beetles etc
  • Ii) leaf miners feed or "mine" between the upper
    and lower epidermal leaf surfaces
  • Generally very small, compressed, flattened
  • usually the larvae of flies, moths, or beetles

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Weevil beetle (the larva is leafminer)
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  • iii) Borer bore into stems of weed/ tree
    trunks/roots of underground plants
  • Often concealed (tak nampak)

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  • iv) Sap suckers
  • Feed on sap the vascular tissues (xylem phloem)
  • Hemiptera/homoptera
  • result discoloration

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  • V) gall making insects
  • Insect command the plant hormonal sys. To produce
    abnormal growth
  • Provide place for the insects to live nutrients

CYNIPID WASP
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CARNIVOROUS
  • i) predators
  • Found everywhere, less nutritional challenge
  • Dragonfly, damselfly, some crickets/flies/beetles
  • Major characteristics of insect predators
  • adults and immatures are often generalists rather
    than specialists
  • they generally are larger than their prey
  • they kill or consume many prey
  • males, females, immatures, and adults may be
    predatory
  • they attack immature and adult prey

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  • ii)parasitoids
  • an organism that spends a significant portion of
    its life history attached to or within a single
    host organism which it ultimately kills (and
    often consumes) in the process.

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  • koinobiont allow the host to continue its
    development and often do not kill/paralyze or
    consume the host until the host is about to
    either pupate or become an adult
  • Idiobiont prevent any further development of the
    host after initial parasitization, and this
    typically involves a host life stage which is
    immobile (e.g., an egg or pupa),
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