A volatile sesquiterpene hydrocarbon with pheromonal and kairomonal activities
trans-β-Farnesene is a volatile sesquiterpene hydrocarbon that has been found in aphids and has alarm pheromone and kairomonal attractant activities.[1],[2] It is produced by aphids in response to predator or parasite attack.[1] trans-β-Farnesene (0.2 ng) induces dispersion of 50% of M. persicae aphids from a cluster. trans-β-Farnesene (>2 μg) also acts as a kairomone, attracting larvae and adults of A. bipunctata, a predator of aphids.[2]
Reference:
[1].Montgomery, M.E., and Nault, L.R.Comparative response of aphids to the alarm pheromone (E)-β-FarneseneEntomol. Exp. Appl.22(3)236-242(1977)
[2].Francis, F., Lognay, G., and Haubruge, E.Olfactory responses to aphid and host plant volatile releases: (E)-β-farnesene an effective kairomone for the predator Adalia bipunctataJ. Chem. Ecol.30(4)741-755(2004)
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