Olaniran, Oladele A., Sudhakar, Akella V.S., Drijfhout, Falko P., Dublon, Ian A.N., Hall, David R. ORCID: https://orcid.org/0000-0002-7887-466X, Hamilton, James G.C. and Kirk, William D.J. (2013) A male-predominant cuticular hydrocarbon, 7-methyltricosane, is used as a contact pheromone in the western flower Thrips Frankliniella occidentalis. Journal of Chemical Ecology, 39 (4). pp. 559-568. ISSN 0098-0331 (Print), 1573-1561 (Online) (doi:10.1007/s10886-013-0272-5)

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Abstract

In a laboratory bioassay, adult female Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) spent more time near filter paper disks that had been exposed to adult males than near unexposed disks; this effect was not observed on disks exposed to adult females. The response could only partly be explained by the known male-produced aggregation pheromone, neryl (S)-2-methylbutanoate, suggesting the presence of an unknown male-produced compound. In gas chromatography/mass spectrometry analyses, 7-methyltricosane was detected on disks exposed to males, but not on disks exposed to females. Extracts of cuticular lipids also showed relatively large amounts of 7-methyltricosane onmales, whereas only trace amounts were found on females and none on larvae. Bioassays of synthetic 7-methyltricosane showed that adults responded only after contact. The response to this compound was clearly different from that to n-tricosane or hexane only controls. Females that contacted 7-methyltricosane on glass beads stayed in the vicinity and frequently raised the abdomen, a
behavior that rejects mating attempts by males. Males stayed in the vicinity and wagged the abdomen sideways, a behavior used in fighting between males. This is the first identification of a contact pheromone in the order Thysanoptera.

Item Type:	Article
Uncontrolled Keywords:	Thysanoptera, Thripidae, Neryl (S)-2-methylbutanoate, mating behavior, fighting behavior, video tracking
Subjects:	Q Science > QH Natural history
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science > Natural Resources Institute
Last Modified:	18 Oct 2016 11:58
URI:	http://gala.gre.ac.uk/id/eprint/9878

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