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Abstract
In 2009, we determined the effects of the enantiomeric composition of the kairomone, α-pinene, on trap catches of arboreal beetles (Coleoptera) in stands of eastern pine trees with resin dominated by (+)-
α-pinene. We hypothesized that the responses of beetles would correlate with the predominant enantiomer of
α-pinene found in host pines. Lures of (+)-, racemic (±), and (−)-
α-pinene were added separately to ethanol-baited multiple-funnel traps. Species such as
Monarthrum mali (Fitch),
Dendroctonus terebrans (Olivier),
Ips grandicollis (Eichhoff), and
Pachylobius picivorus (Germar) (Coleoptera: Curculionidae) showed a preference for traps co-baited with (–)-
α-pinene.
α-Pinene enhanced attraction of
Hylastes salebrosus Eichhoff,
Hylastes porculus Erickson and
Hylastes tenuis Eichhoff (Coleoptera: Curculionidae) to ethanol-baited traps with no effects from enantiomeric composition of
α-pinene. The attraction of the ambrosia beetles,
Xyleborinus saxesenii (Ratzeburg) and
Dryoxylon onoharaense (Murayama) (Coleoptera: Curculionidae) to ethanol-baited traps was interrupted by the addition of
α-pinene, regardless of enantiomeric composition. Species such as
Xylosandrus germanus (Blandford),
Cnestus mutilatus (Blandford) and
Stenoscelis brevis (Boheman) (Coleoptera: Curculionidae) were unaffected by the presence of
α-pinene. Trap catches of some species of longhorn beetles and bark beetle predators (Coleoptera: Cerambycidae, Cleridae, Elateridae, Histeridae, and Trogossitidae) were increased by the addition of α-pinene, although results varied by location.
Platysoma spp. (Coleoptera: Histeridae) showed a marked preference for traps co-baited with (+)-
α-pinene in Florida and Georgia. In summary, we found that the enantiomeric composition of
α-pinene in hosts was not a good predictor of enantiomeric preferences by beetles
Citation
Miller, Daniel R; Mayfield, Albert E; Poland, Therese M; Fettig, Christopher. 2024. Enantiomeric composition of
α-pinene affects catches of bark and wood boring beetles, and associated species, in ethanol-baited multiple-funnel traps. Journal of Economic Entomology. 117(4): 1526-1536. https://doi.org/10.1093/jee/toae100.
