It is said that the pea aphid elicit minimal volatile response defense in broad bean plants.And some experiments also support the point.However,I don not konw the differences of volatiles released by broad bean between which was being feeding by pea aphid and which was afeter the attacker removed ?
Justin B Runyon
This paper is what you need: Schwartzberg, E. G., Böröczky, K., & Tumlinson, J. H. 2011. Pea aphids, Acyrthosiphon pisum, suppress induced plant volatiles in broad bean, Vicia faba. Journal of chemical ecology, 37: 1055-1062.
Aphids only induced small amounts of two VOCs: (Z)-3-hexenol and (E)-ß-farnesene. I would suspect that emission of these two VOCs would gradually return to normal once aphids are removed. But this is only a guess.
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