Characterization of Male-Produced Aggregation Pheromone of the Bean Flower Thrips Megalurothrips sjostedti (Thysanoptera: Thripidae)

Journal of Chemical Ecology
Saliou NiassySevgan Subramanian

Abstract

Aggregation of the bean flower thrips, Megalurothrips sjostedti (Trybom) (Thysanoptera: Thripidae), has been observed on cowpea, Vigna unguiculata (L.) Walp. To understand the mechanism underpinning this behavior, we studied the responses of M. sjostedti to headspace volatiles from conspecifics in a four-arm olfactometer. Both male and female M. sjostedti were attracted to male, but not to female odor. Gas chromatography/mass spectrometry (GC/MS) analyses revealed the presence of two distinct compounds in male M. sjostedti headspace, namely (R)-lavandulyl 3-methylbutanoate (major compound) and (R)-lavandulol (minor compound); by contrast, both compounds were only present in trace amounts in female headspace collections. A behavioral assay using synthetic compounds showed that male M. sjostedti was attracted to both (R)-lavandulyl 3-methylbutanoate and (R)-lavandulol, while females responded only to (R)-lavandulyl 3-methylbutanoate. This is the first report of a male-produced aggregation pheromone in the genus Megalurothrips. The bean flower thrips is the primary pest of cowpea, which is widely grown in sub-Saharan Africa. The attraction of male and female M. sjostedti to these compounds offers an opportunity to develop ecologic...Continue Reading

References

Apr 13, 2004·Journal of Chemical Ecology·William D J Kirk, James G C Hamilton
Oct 14, 2005·Journal of Chemical Ecology·James G C HamiltonWilliam D J Kirk
Mar 1, 2012·Journal of Chemical Ecology·Amanuel TamiruZeyaur R Khan
Jan 1, 2009·Language Learning and Development : the Official Journal of the Society for Language Development·Daniel J WeissAaron D Mitchel
Aug 8, 2014·PloS One·Sudhakar V S AkellaJames G C Hamilton
Jan 5, 2016·Entomologia Experimentalis Et Applicata·Saliou NiassySevgan Subramanian
Jun 3, 2018·Journal of Chemical Ecology·Nelson L MwandoSevgan Subramanian

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Citations

Jan 9, 2021·Annual Review of Entomology·William D J KirkDavid A J Teulon

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Methods Mentioned

BETA
acylation

Software Mentioned

OLFA
R Development Core Team
R

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