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Variation in Enantiospecific Attraction of Ips avulsus (Coleoptera: Curculionidae) to the Pheromone Ipsdienol in Georgia

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In 2006, we tested the responses of the small southern pine engraver, Ips avulsus (Eichhoff) (Coleoptera: Curculionidae), to multiple-funnel traps baited with (+)-, (‐)-, and (±)-ipsdienol. Three experiments were conducted in Georgia with all traps co-baited with one of the following lure combinations, respectively: experiment 1, ipsenol; experiment 2, lanierone and (‐)-α-pinene; and experiment 3, ipsenol, lanierone, and (‐)-α-pinene. Ipsdienol and lanierone are aggregation pheromones used by I. avulsus, whereas ipsenol is an aggregation pheromone used by the eastern fivespined ips, Ips grandicollis (Eichhoff), a sympatric species also breeding in pines. In all experiments, the highest catches of I. avulsus were obtained in traps baited with (±)-ipsdienol. The relative attractiveness of (+)-ipsdienol varied across the three experiments. When traps were co-baited with ipsenol, lanierone, and (‐)-α-pinene, catches of I. avulsus in traps baited with (+)-ipsdienol were high and no different from those in traps baited with (±)-ipsdienol. When traps were co-baited with lanierone and (‐)-α-pinene, catches in traps baited with (+)-ipsdienol were lower than those in traps baited with (±)-ipsdienol by ≈40%, whereas catches were reduced by ≈95% when traps were co-baited with ipsenol alone. We hypothesize that the observed variation in enantiospecific responses of I. avulsus to ipsdienol may be explained by variation in semiochemical context (i.e., different co-baits among the experiments) or seasonal variation.

Keywords: Ips avulsus; enantiomers; ipsdienol; seasonal variation; semiochemical context

Document Type: Research Article

DOI: http://dx.doi.org/10.1603/EC10405

Publication date: June 1, 2011

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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