Attractive host kairomones for the cigarette beetle, Lasioderma serricorne (Coleoptera: Anobiidae)
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| Authors: | Gries, R; Khaskin, G; Cepeda, P; Gries, G; Britton, R; Borden, JH |
| Year: | 2022 |
| Journal: | J. Stored Prod. Res. 99 Article Link (DOI) |
| Title: | Attractive host kairomones for the cigarette beetle, Lasioderma serricorne (Coleoptera: Anobiidae) |
| Abstract: | Analyses of pooled headspace volatiles from three commercial chili pepper, Capsicum spp., products by coupled gas chromatographic-electroantennographic detection (GC-EAD) and coupled GC-mass spectrometry (MS) revealed 10 compounds (beta-pinene, gamma-terpinene, linalool, 2-phenylethanol, cumin aldehyde, 1,3-menthadienal, eugenol, trans-beta-caryophyllene, caryophyllene oxide, and an unknown compound which co-eluted with 2-phenyl -ethanol) that elicited responses from the antennae of cigarette beetles, Lasioderma serricorne. The unknown compound was separated by silica fractionation and identified by MS and NMR spectroscopy as 2-hydroxy-2,6,6-trimethyl-cyclohexanone. In Y-tube olfactometer bioassays, beetles were attracted to the 10-component synthetic blend and to many six-and four-component blends, demonstrating widespread redundancy in bioactivity among the components. Eugenol was discounted as an attractant, whereas beta-caryophyllene and linalool had previously been identified as kairomones for L. serricorne. The remaining seven compounds are novel host kairomones for L. serricorne , bringing the total of known host kairomones for this species to 18. The redundancy among host kairomones may enable L. serricorne to find and infest many highly variable stored products, any one of which may emit only a few of the known kairomones. |
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