Kirk
Characterization of Male-Produced Aggregation Pheromone of the Bean Flower Thrips Megalurothrips sjostedti (Thysanoptera: Thripidae)
Kirk
Authors
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 ecologically sustainable management methods for M. sjostedti in Africa.
Acceptance Date | Feb 9, 2019 |
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Publication Date | Apr 1, 2019 |
Journal | Journal of Chemical Ecology |
Print ISSN | 0098-0331 |
Publisher | Springer Verlag |
Pages | 348-355 |
DOI | https://doi.org/10.1007/s10886-019-01054-8 |
Keywords | Thrips pheromone, Megalurothrips sjostedti, Grain legumes, Olfactometer bioassay, Headspace analysis |
Publisher URL | http://doi.org/10.1007/s10886-019-01054-8 |
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Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/
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