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INSECT ECOLOGY

INSECT ECOLOGY. 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. HERBIVOROUS.

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INSECT ECOLOGY

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  1. INSECT ECOLOGY

  2. 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

  3. 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

  4. Weevil beetle (the larva is leafminer)

  5. iii) Borer: bore into stems of weed/ tree trunks/roots of underground plants • Often concealed (tak nampak)

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

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

  8. 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

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

  10. 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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