Identification of sex pheromone components of nettle caterpillar, Setothosea asigna
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| Authors: | Sasaerila, Y; Gries, G; Khaskin, G; Greis, R; Hardi |
| Year: | 1997 |
| Journal: | J. Chem. Ecol. 23: 2187-2196 Article Link (DOI) |
| Title: | Identification of sex pheromone components of nettle caterpillar, Setothosea asigna |
| Abstract: | Gas chromatographic-electroantennographic detection (GC-EAD) analyses of female nettle caterpillar, Setothosea asigna, pheromone gland extracts revealed seven antennally active compounds. Based on their retention indices on three fused silica columns (DB-5, DB-23, and DB-210), these compounds were hypothesized and, through comparative GC, GC-EAD and GC-mass spectrometry with authentic standards, confirmed to be Delta 10-undecenal, dodecanal, (E)-9-dodecenal (E9-12:Ald), (Z)-9-dodecenal, (E)-9-dodecen-1-ol, (E)-9,11-dodecadienal (E9,11-12: Ald), and (E)-9,11-dodecadienol. E9-12:Ald and E9,11-12:Ald were most abundant in female S, asigna pheromone extracts. In field trapping experiments in Palembang, Indonesia, synthetic E9-12:Ald and E9,11-12:Ald at a 1:1 ratio, but not singly, attracted S. asigna males. Attractiveness of these two aldehydes could not be enhanced further through the addition of their corresponding alcohols and/or other aldehydic candidate pheromone components. Use of E9-12:Ald and E9,11-12:Ald for pheromone-based monitoring of S. asigna populations will require lure formulations that minimize pheromone degradation by ultraviolet radiation and atmospheric oxidation. |
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