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In-flight orientation of the braconid Aphidius ervi in response to volatiles released from broad bean plants infested by the pea aphid, Acyrthosiphon pisum, was studied in a no-choice wind-tunnel bioassay. The role of aphid infestation level and duration, systemic production of volatiles by “insect-free” parts of the plant, and the specificity of aphid-induced volatiles on the flight behavior of the...
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