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Volatiles released from foliar extract of host plant enhance landing rates of gravid Polygonia c-album females, but do not stimulate oviposition
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry. Nature Research Center, Lithuania.ORCID iD: 0000-0002-1719-2294
Nature Research Center, Lithuania.
Nature Research Center, Lithuania.
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Organic Chemistry. Moldova State University, Moldova.
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2016 (English)In: Entomologia Experimentalis et Applicata, ISSN 0013-8703, E-ISSN 1570-7458, Vol. 158, no 3, 275-283 p.Article in journal (Refereed) PublishedText
Abstract [en]

The role of olfactory cues for host search is much less investigated in day-active butterflies than in their relatives, the nocturnal moths. The goal of this study was to investigate whether host-plant volatiles from foliar extracts of hop, Humulus lupulus L. (Cannabaceae), evoke electroantennographic (EAG) responses, increase landing rates, and stimulate egg-laying behavior of gravid Polygonia c-album L. (Lepidoptera: Nymphalidae) females. Eighty-nine volatile compounds were detected in a non-concentrated methanol extract of hop by gas chromatography-mass spectrometry, 11 of which elicited an EAG response. Concentration of the crude extract significantly reduced landing rates on artificial leaves treated with the sample due to loss of volatile compounds, but after landing the oviposition response of gravid females was not affected. A mixture of eight commercially available EAG-active volatiles increased the landing rate of gravid females to their source but did not act as oviposition stimulants. Dividing the volatile compounds into two groups - consisting of (1) hexanal, (E)-2-hexenal, octanal, nonanal, and decanal, and (2) sulcatone, humulene, and benzyl alcohol - obliterated effectiveness, revealing synergism between compounds. Although volatiles did not stimulate oviposition, they significantly contributed to the distribution of eggs by increasing the landing rates on treated artificial leaves.

Place, publisher, year, edition, pages
Blackwell Publishing, 2016. Vol. 158, no 3, 275-283 p.
Keyword [en]
butterfly, Nymphalidae, Humulus lupulus, egg laying, stimulant, synergism, EAG, Cannabaceae, Lepidoptera
National Category
Zoology
Identifiers
URN: urn:nbn:se:kth:diva-184023DOI: 10.1111/eea.12405ISI: 000370952200006ScopusID: 2-s2.0-84958774317OAI: oai:DiVA.org:kth-184023DiVA: diva2:914497
Note

QC 20160324

Available from: 2016-03-24 Created: 2016-03-22 Last updated: 2016-05-02Bibliographically approved

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