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Published online by Cambridge University Press: 31 May 2012
Semiochemical-mediated behavior of the striped ambrosia beetle, Trypodendron lineatum (Olivier) (Coleoptera: Scolytidae), has received extensive study. In selecting and mass-attacking hosts in nature, it utilizes a blend of volatiles, including the aggregation pheromone, lineatin, and the host kairomones α-pinene and ethanol (MacConnell et al. 1977; Vité and Bakke 1979; Borden et al. 1982; Bakke 1983; Lindgren et al. 1983). In single cell recordings of European T. lineatum olfactory cells, Tømmerås and Mustaparta (1989) reported no response to pheromones of other scolytid species. However, Benz et al. (1986) reported some response in the field by European T. lineatum to a blend of synthetic Ips typographus (L.) pheromones, although a single attractant was not identified. We report that frontalin, a pheromone utilized by numerous Dendroctonus spp., is an attractive kairomone for T. lineatum in western North America.