1-octen-3-ol isolated from bont ticks attracts Amblyomma variegatum.
Volatiles from various life-stages of the bont ticks Amblyomma variegatum and A. hebraeum were collected by using solid-phase microfibers and charcoal traps. An octenol isomer was found to be a major constituent of most of the tick material sampled and was identified as 1-octen-3-ol by gas chromatography-mass spectrometry and by using antenna of the tsetse fly Glossina brevipalpis in gas chromatography-linked antennogram detection. Release of this compound increased during molt to adulthood and following mechanical disturbance of adult ticks. (R)-(-)-1-Octen-3-ol and racemate 1-octen-3-ol both induce an increase in upwind walk to the odor source from A. variegatum in an airstream on a servosphere. Volatiles from tick exuviae plus feces and from dead ticks also attracted A. variegatum, suggesting that 1-octen-3-ol may contribute to the aggregation response of Amblyomma spp. on such substrates. 2,6-Dichloroanisol and 2,5-dimethylpyrazine also were detected in volatiles from the ticks but induced no behavioral responses on the servosphere. The suspected tick pheromone component, 2,6-dichlorophenol, was detected from A. variegatum adults cut into pieces but had no effect on the behavior of A. variegatum on the servosphere at a range of doses.
McMahon
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C
Institute of Zoology, University of Neuchâtel, Rue Emile-Argand 11, 2007-Neuchâtel, Switzerland.
Guerin
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PM
Syed
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Z
D000818:Animals; D004594:Electrophysiology; D005243:Feces / Q000737:chemistry; D005260:Female; D008401:Gas Chromatography-Mass Spectrometry; D026863:Ixodidae / Q000502:physiology*; D008297:Male; D000442:Octanols / Q000032:analysis / Q000302:isolation & purification*; D010675:Pheromones / Q000737:chemistry* / Q000502:physiology
D000442:Octanols; D010675:Pheromones; C038844:1-octen-3-ol