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Aphid alarm pheromone: isolation, identification, synthesis.

W S Bowers, L R Nault, R E Webb

    Science (New York, N.Y.)
    |September 22, 1972
    PubMed
    Summary
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    A broadly interspecific aphid alarm pheromone was identified as trans-beta-farnesene. This finding is significant for several economically important aphid species.

    Area of Science:

    • Entomology
    • Chemical Ecology
    • Insect Behavior

    Background:

    • Aphids are significant agricultural pests causing crop damage.
    • Alarm pheromones are crucial for aphid communication and survival.
    • Understanding aphid alarm signals can aid in pest management strategies.

    Purpose of the Study:

    • To isolate and identify the alarm pheromone in economically important aphid species.
    • To determine if a common alarm pheromone exists across different aphid species.

    Main Methods:

    • Chemical analysis of aphid volatiles.
    • Gas chromatography-mass spectrometry (GC-MS) for compound identification.
    • Behavioral assays to confirm pheromone activity.

    Main Results:

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    • A single compound, trans-beta-farnesene, was consistently detected.
    • This compound elicited alarm responses in tested aphid species.
    • The identified pheromone is broadly conserved across multiple aphid species.

    Conclusions:

    • Trans-beta-farnesene serves as a common alarm pheromone for diverse aphid species.
    • This discovery has implications for developing novel aphid control methods.
    • The conserved nature of this pheromone highlights its evolutionary importance.