Chemical ecology of oil palm bunch moth, Tirathaba mundella (Lepidoptera: Pyralidae) and nettle caterpillars, Darna bradleyi, D. trima, Setothosea asigna and Setora nitens (Lepidoptera: Limacodidae).

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題名:
Chemical ecology of oil palm bunch moth, Tirathaba mundella (Lepidoptera: Pyralidae) and nettle caterpillars, Darna bradleyi, D. trima, Setothosea asigna and Setora nitens (Lepidoptera: Limacodidae).
著者: Yorianta. Sasaerila
Simon Fraser University (Canada).
主題: Biology, Entomology; Biology, Ecology
所屬期刊: Dissertation Abstracts International 64-08B.
描述: Mate signalling systems in moths may have evolved in response to the type of larval resources and community composition. I have investigated mate signalling systems in five species co-inhabiting oil palms in Asia: Tirathaba mundella (Pyralidae) and Darna bradleyi, Darna trima, Setothosea asigna and Setora nitens (Limacodidae). Larvae of T. mundella develop inside fruit bunches (a rare resource for larval development), whereas limacodid larvae consume leaves (an abundant resource). Objectives. (1) test the hypothesis that T. mundella employ a male-signalling sexual communication system; (2) identify communication signals in T. mundella and in the limacodids; and (3) investigate mechanisms imparting specificity to the limacodids' sexual communication systems.
Bioassay results supported the hypothesis that male T. mundella attract females. Gas chromatographic-electroantennographic detection (GC-EAD) and GC-mass spectrometric analyses of male T. mundella hair pencil extracts revealed four candidate pheromone components: (3 S,6S)-2,2,6-trimethyl-6-vinyl-tetrahydro-pyran-3-ol (1), 4-hydroxy-3-methoxy-benzaldehyde (2), 6,10,14-trimethyl-2-pentadecanol (3), and 6,10,14-trimethyl-2-pentadecanone (4). Synthetic stereoisomeric 1 plus 2 attracted female T. mundella.
Laboratory and field experiments also revealed the pheromone components for female S. asigna [(E)-9-dodecenal, ( E)-9,11-dodecadienal], S. nitens (Z)-9-dodecenal, (Z)-9,11-dodecadienal], D. trima [( S)-2-methylbutyl (E)-7,9-decadienoate, ( E)-2-hexenyl (E)-7,9-decadienoate], and D. bradleyi [methyl (E)-7,9-decadienoate, isobutyl (E)-7,9decadienoate].
Sexual communication of D. bradleyi and D. trima took place from ∼17:30 to 18:45 h, and that of S. asigna and S. nitens from ∼18:45 to 20:00 h and from ∼18:30 to 19:30 h, respectively. Most male S. asigna and S. nitens were captured in pheromone-baited traps suspended >5 m high, whereas most male D. bradleyi and D. trima were captured in traps <5 m high. Baits containing both S. asigna and S. nitens pheromones did not attract any male moths, indicating that female S. asigna and S. nitens, with overlapping communication periods, use bifunctional pheromone components that attract conspecific males while repelling heterospecifics. These differences in diel periodicity, intra- and interspecific effects of communication signals and/or microlocation for signaling allow these limacodids to co-inhabit the same habitat and remain reproductively isolated.
That male T. mundella and female D. bradleyi, D. trima, S. asigna and S. nitens produce pheromones to attract mates supports the hypothesis that the type of larval resources affects the sexual communication system of adult moths.
出版者: Thesis (Ph.D.)--Simon Fraser University (Canada), 2003.
建立日期: 2003
格式: 123 p..
語言: 英文
識別號: ISBN0612816125
資源來源: NUTN ALEPH

連結

Chemical ecology of oil palm bunch moth, Tirathaba mundella (Lepidoptera: Pyralidae) and nettle caterpillars, Darna bradleyi, D. trima, Setothosea asigna and Setora nitens (Lepidoptera: Limacodidae).

Yorianta. Sasaerila Simon Fraser University (Canada). 2003

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