title: Behavioral and electrophysiological responses of Aphids to host and nonhost plant volatiles.
abstract: Alate and apterous virginoparae ofAphis fabae Scop, and alate virginoparae ofBrevicoryne brassicae (L.), walking in a linear track olfactometer, were attracted by odor from leaves of their host plants.A. fabae responded to odor from undamaged but not damaged bean leaves. Gynoparae (autumn migrants) ofA. fabae, however, did not respond to their host plant (spindle,Euonymus europaeus) odor. Odors of certain nonhost plants masked the attractiveness of the host plant leaves, but tansy (Tanacetum vulgare) and summer savory (Satureja hortensis) volatiles repelledB. brassicae andA. fabae, respectively. 3-Butenyl isothiocyanate attractedB. brassicae andLipaphis erysimi (Kalt.), the latter species being more sensitive in both behavioral and electrophysiological studies. Isothiocyanate receptors were found on the antennae ofA. fabae, which was repelled by these compounds, 4-pentenyl isothiocyanate being the most active.
authors.affiliation: Agricultural and Food Research Council Linked Research Group in Aphid Biology Department of Biology, Imperial College of Science, Technology and Medicine, SW7 2AZ, London, UK.
authors.forename: S F
authors.initials: SF
authors.lastname: Nottingham
authors.forename: J
authors.initials: J
authors.lastname: Hardie
authors.forename: G W
authors.initials: GW
authors.lastname: Dawson
authors.forename: A J
authors.initials: AJ
authors.lastname: Hick
authors.forename: J A
authors.initials: JA
authors.lastname: Pickett
authors.forename: L J
authors.initials: LJ
authors.lastname: Wadhams
authors.forename: C M
authors.initials: CM
authors.lastname: Woodcock