title: Host Plant Volatiles and the Sexual Reproduction of the Potato Aphid, Macrosiphum euphorbiae.
abstract: In late summer, heteroecious aphids, such as the potato aphid, Macrosiphum euphorbiae, move from their secondary summer host plants to primary host plants, where the sexual oviparae mate and lay diapausing eggs. We tested the hypothesis that volatiles of the primary host, Rosa rugosa, would attract the gynoparae, the parthenogenetic alate morph that produce oviparae, as well as the alate males foraging for suitable mates. In wind tunnel assays, both gynoparae and males oriented towards and reached rose cuttings significantly more often than other odour sources, including potato, a major secondary host. The response of males was as high to rose cuttings alone as to potato with a calling virgin oviparous female. These findings are discussed within the seasonal ecology of host alternating aphids.
authors.affiliation: Department of Biology, Western University, London, ON, N6A 5B7, Canada. jessica.hurley@basf.com.
authors.forename: Jessica
authors.initials: J
authors.lastname: Hurley
authors.affiliation: Center for Ecological Research, Kyoto University 2-509-3, Hirano, Otsu 520-2113, Japan. uhtakem@ipc.shizuoka.ac.jp.|Research Institute of Green Science and Technology, Shizuoka University 836, Ohya, Shizuoka 422-8529, Japan. uhtakem@ipc.shizuoka.ac.jp.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Takemoto
authors.affiliation: Center for Ecological Research, Kyoto University 2-509-3, Hirano, Otsu 520-2113, Japan. junji@ecology.kyoto-u.ac.jp.
authors.forename: Junji
authors.initials: J
authors.lastname: Takabayashi
authors.affiliation: Department of Biology, Western University, London, ON, N6A 5B7, Canada. jmcneil2@uwo.ca.
authors.forename: Jeremy N
authors.initials: JN
authors.lastname: McNeil
keywords: Macrosiphum euphorbiae; female sex pheromone; host plant volatiles; mate location; potato aphid; sexual morphs