A Male-Predominant Cuticular Hydrocarbon, 7-Methyltricosane, is used as a Contact Pheromone in the Western Flower Thrips Frankliniella occidentalis

Olaniran, Oladele A. and Sudhakar, Akella V.S. and Drijfhout, Falko P. and Dublon, Ian A.N. and Hall, David R. and 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

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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 on males, 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:
Journal Article
Journal or Publication Title:
Journal of Chemical Ecology
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1300/1303
Subjects:
ID Code:
140233
Deposited By:
Deposited On:
10 Jan 2020 08:55
Refereed?:
Yes
Published?:
Published
Last Modified:
26 Aug 2020 04:53