title: Field response of the dutch elm disease vectors,Scolytus multistriatus (Marsham) andS. scolytus (F.) (Coleoptera: Scolytidae) to 4-methyl-3-heptanol baits containing α-, β-,δ-, or δ-multistriatin.
abstract: The field responses of English populations of the Dutch elm disease vectors,Scolytus multistriatus andS. scolytus to baits containing 4-methyl-3-heptanol, a host synergist [(-)-α-cubebene or (-)-limonene] and (±)-α-, (+)-β-, (-)-β-, (±)-γ-, or (±)-δ-multistriatin were examined. (±)-α-Multistriatin, released at 5-10 μg/day, enhanced the response ofS. multistriatus to baits containing 4-methyl-3-heptanol and either of the host synergists but had no effect on the capture ofS. scolytus. The release of larger amounts (57 or 365 μg/day) of (±)-α-multistriatin interrupted the response of both species to the 4-methyl-3-heptanol baits. It appears that α-multistriatin has multiple functions as a behavior-modifying substance for the two beetles. The (+)-β-, (-)-β-, (±)-γ-, and (±)-δ-multistriatins were inactive when released at 5-10 μg/day. The results of these field experiments suggest that one bait can be formulated to capture both species.
authors.affiliation: Agricultural Research Council Unit of Invertebrate Chemistry and Physiology, University of Sussex Falmer, BN1 9RQ, Brighton, Sussex, England.
authors.forename: M M
authors.initials: MM
authors.lastname: Blight
authors.forename: N J
authors.initials: NJ
authors.lastname: Fielding
authors.forename: C J
authors.initials: CJ
authors.lastname: King
authors.forename: A P
authors.initials: AP
authors.lastname: Ottridge
authors.forename: L J
authors.initials: LJ
authors.lastname: Wadhams
authors.forename: M J
authors.initials: MJ
authors.lastname: Wenham