Sex pheromone components of male <Emphasis Type="Italic">Tirathaba mundella</Emphasis> (Lepidoptera: Pyralidae) |
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Authors: | Yorianta?Sasaerila Regine?Gries Gerhard?Gries Grigori?Khaskin Skip?King Stephen?Takács Hardi? |
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Institution: | (1) Centre for Environmental Biology, Department of Biological Sciences Simon Fraser University, Burnaby, British Columbia, Canada V5A 1S6, CA;(2) P.T. Tania Selatan Group, Palembang, 30127 Indonesia, ID |
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Abstract: | Summary. During peak calling activity by male oil palm bunch
moths, Tirathaba mundella Walker (Lepidoptera: Pyralidae), their
hairpencils, wings or entire body were extracted in hexane. Gas
chromatographic-electroantennographic detection (GC-EAD) analyses of
hair pencil extracts revealed four compounds that consistently elicited
responses from female antennae. The NMR spectrum of isolated compound 1,
and mass spectra and retention indices of compounds 1–4 suggested that
they were (3S,6S)-2,2,6-trimethyl-6-vinyl-tetrahydro-pyran-3-ol (1),
4-hydroxy-3-methoxy-benzaldehyde (2, vanillin),
6,10,14-trimethyl-2-pentadecanone (3), and
6,10,14-trimethyl-2-pentadecanol (4). Comparative GC and GC-MS analyses
of hair pencils extract and synthetic standards confirmed these
structural assignments. Moreover, comparative chromatography of
synthetic and hairpencil-isolated 1 on a Cyclodex-B column (which
separated the four stereoisomers with baseline resolution) revealed that
male T. mundella produce the SS-stereoisomer (SS-1). In field cage
bioassay experiments in Palembang, Indonesia, synthetic SS-1 and
vanillin in combination, but not singly, attracted female T. mundella.
SS-1 plus vanillin were as effective as male T. mundella in attracting
females. Compounds 3 and 4 did not enhance the blend's attractiveness.
Received October 11 2002; accepted March 14, 2003.
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Correspondence to: Gerhard Gries, email: gries@sfu.ca |
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Keywords: | ,Tirathaba mundella –, Lepidoptera –, Pyralidae –,male pheromone –, (3S,6S)-2,2,6-trimethyl-6-vinyl-tetrahydro- pyran-3-ol,,,,,–, 4-hydroxy-3-methoxy-benzaldehyde –, 6,10,14-trimethyl-2-pentadecanol –,6,10,14-trimethyl-2-pentadecanone –, vanillin –, gas,,,,,chromatographic-electroantennographic detection –, field cage bioassay experiments |
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