lnu.sePublications
Change search
Refine search result
1 - 16 of 16
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Rows per page
  • 5
  • 10
  • 20
  • 50
  • 100
  • 250
Sort
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
  • Standard (Relevance)
  • Author A-Ö
  • Author Ö-A
  • Title A-Ö
  • Title Ö-A
  • Publication type A-Ö
  • Publication type Ö-A
  • Issued (Oldest first)
  • Issued (Newest first)
  • Created (Oldest first)
  • Created (Newest first)
  • Last updated (Oldest first)
  • Last updated (Newest first)
  • Disputation date (earliest first)
  • Disputation date (latest first)
Select
The maximal number of hits you can export is 250. When you want to export more records please use the Create feeds function.
  • 1. Bohman, B
    et al.
    Nordlander, G
    Nordenhem, H
    Sunnerheim, K
    Borg-Karlson, A-K
    Unelius, Rikard
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Structure - activity relationships of phenyl propanoids as antifeedants for the pine weevil Hylobius abieist2008In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 34, no 3, p. 339-352Article in journal (Refereed)
  • 2.
    Brown, Robert L.
    et al.
    The New Zealand Institute for Plant & Food Research Ltd, New Zealand ; University of Auckland, New Zealand.
    El-Sayed, Ashraf M
    The New Zealand Institute for Plant & Food Research Ltd, New Zealand.
    Unelius, C. Rikard
    Linnaeus University, Faculty of Health and Life Sciences, Department of Chemistry and Biomedical Sciences. The New Zealand Institute for Plant & Food Research Ltd, New Zealand.
    Beggs, Jacqueline R
    University of Auckland, New Zealand.
    Suckling, David M
    The New Zealand Institute for Plant & Food Research Ltd, New Zealand ; University of Auckland, New Zealand.
    Invasive Vespula Wasps Utilize Kairomones to Exploit Honeydew Produced by Sooty Scale Insects, Ultracoelostoma.2015In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 41, no 11, p. 1018-1027Article in journal (Refereed)
    Abstract [en]

    Vespula wasps are widely distributed invasive alien species that are able to reach high population densities in the 1.2 M ha of beech forests (Fuscospora spp.) of New Zealand's South Island. These endemic temperate forests have an abundance of carbohydrate-rich honeydew produced by native scale insects (Ultracoelostoma spp.). A characteristic aroma is associated with the honeydew in beech forests, which we hypothesized is the signal used by wasps to harvest the vast resources previously exploited by birds and other insects. Volatile collections were taken of black beech tree trunks with honeydew and sooty mold present, and analyzed with a gas chromatograph-mass spectrometer. Eleven compounds (benzaldehyde, benzyl alcohol, 2-phenylethyl acetate, 2-phenylethanol, phenylacetaldehyde, methyl 2-phenylacetate, ethyl 2-phenylacetate, methyl salicylate, n-octanol, octan-3-ol, and 1-octen-3-ol) were positively identified from the headspace, and were shown to elicit an electrophysiological response from Vespula vulgaris worker antennae by using electroantennography (EAG). Field trials with delta traps individually baited with these compounds confirmed wasp attraction to 8 of the 11 compounds tested, with 2-phenylethyl acetate, methyl salicylate, and octan-3-ol capturing the same numbers of wasps as the control. In later trials, attraction to a 1:1 blend of benzaldehyde and n-octanol was significantly higher (45 %) than to any other treatment. Many of the chemicals identified are known to be associated with fermenting sugars, or with fungal aroma. Benzaldehyde and n-octanol are common compounds produced by many different species in nature. The ability to respond to generic signals emanating from sugar resources is likely to contribute to the success of V. vulgaris as an invasive species.

  • 3.
    Byers, J. A.
    et al.
    SLU, Alnarp.
    Hogberg, H. E.
    Midsweden University, Sundsvall.
    Unelius, C. Rikard
    KTH, Stockholm.
    Birgersson, G.
    SLU, Alnarp.
    Lofqvist, J.
    SLU, Alnarp.
    Structure Activity Studies on Aggregation Pheromone Components of Pityogenes-Chalcographus (Coleoptera, Scolytidae) - All Stereoisomers of Chalcogran and Methyl 2,4-Decadienoate1989In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 15, no 2, p. 685-695Article in journal (Refereed)
  • 4. El-Sayed, A.M.
    et al.
    Wainman, L.I.
    Santangelo, E.M.
    Unelius, Rikard
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Trimble, R.M.
    Relative Attractiveness of (10E)-Dodecenyl Acetate and (4E,10E)-Dodecadienyl Acetate to Male Spotted Tentiform Leafminers Phyllonorycter blancardella (F.),2004In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 30, no 9, p. 1827-38Article in journal (Refereed)
  • 5. Gibb, A.R.
    et al.
    Suckling, D.M.
    El-Sayed, A.M.
    Bohman, Björn
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Unelius, Rikard
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Dymock, J.J
    Larsen, M.L.
    Willoughby, B.E.
    (Z,E)-11,13-Hexadecadienyl Acetate: Sex Pheromone of the Grass Webworm Herpetogramma licarsisalis - Identification, Synthesis and Field Bioassays.2007In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 33, no 4, p. 839-47Article in journal (Refereed)
  • 6.
    Lanne, B. S.
    et al.
    Gothenburg University.
    Schlyter, F.
    SLU, Alnarp.
    Byers, J. A.
    SLU, Alnarp.
    Lofqvist, J.
    SLU, Alnarp.
    Leufven, A.
    Gothenburg University.
    Bergstrom, G.
    Gothenburg University.
    Vanderpers, J. N. C.
    Unelius, C. Rikard
    KTH, Stockholm.
    Baeckstrom, P.
    KTH, Stockholm.
    Norin, T.
    KTH, Stockholm.
    Differences in Attraction to Semiochemicals Present in Sympatric Pine Shoot Beetles, (Coleoptera, Scolytidae) Tomicus minor and Tomicus piniperda1987In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 13, no 5, p. 1045-1067Article in journal (Refereed)
  • 7.
    Mozuraitis, R.
    et al.
    KTH, Sweden.
    Buda, V.
    Liblikas, I.
    KTH, Sweden.
    Unelius, C. Rikard
    Borg-Karlson, A. K.
    KTH, Sweden.
    Parthenogenesis, calling behavior, and insect-released volatiles of leafminer moth Phyllonorycter emberizaepenella2002In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 28, no 6, p. 1191-1208Article in journal (Refereed)
    Abstract [en]

    We proved that the leafminer moth Phyllonorycter emberizaepenella (Lepidoptera: Gracillariidae) reproduces by parthenogenesis of the thelytoky type. Despite a complete absence of males, parthenogenetically reproducing females diurnally demonstrated the calling posture normally used for releasing signaling compounds. Two compounds, which we collected from a calling female, were identified as potential sex pheromone components: (8E,10E)-8,10-tetradecadienyl acetate and (8E,10E)-8,10-tetradecadienol, the latter occurring only in trace amounts. In field experiments, no males were attracted to traps baited with either the potential sex pheromone or with virgin females. Both the pattern of behavior and the chemical characteristics of the pheromone of Ph. emberizaepenella species were similar to those known for Lepidoptera with the usual amphimictic mode of reproduction. Theoretical speculations that in thelytoky, where there is no need to find a sexual partner, the individuals would obtain certain advantages due to reduction in their sexual behavior, were, thus, not confirmed for Ph. emberizaepenella.

  • 8.
    Park, Kye Chung
    et al.
    New Zealand Inst Plant & Food Res Ltd, New Zealand.
    McNeill, Mark R.
    AgResearch Ltd, New Zealand.
    Suckling, David M.
    New Zealand Inst Plant & Food Res Ltd, New Zealand;Univ Auckland, New Zealand.
    Unelius, C. Rikard
    Linnaeus University, Faculty of Health and Life Sciences, Department of Chemistry and Biomedical Sciences. New Zealand Inst Plant & Food Res Ltd, New Zealand.
    Olfactory Receptor Neurons for Plant Volatiles and Pheromone Compounds in the Lucerne Weevil, Sitona discoideus2020In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 46, p. 250-263Article in journal (Refereed)
    Abstract [en]

    Antennal olfactory receptor neurons (ORNs) for pheromone-related and plant volatile compounds were identified and characterized in the lucerne weevil, Sitona discoideus (Gyllenhal), using the single sensillum recording technique. Our study using five pheromone-related compounds and 42 plant volatile compounds indicates that S. discoideus have highly specialized ORNs for pheromone and plant volatile compounds. Different groups of ORNs present in both males and females of S. discoideus were highly sensitive to 4-methylheptane-3,5-dione (diketone) and four isomers (RR, RS, SR and SS) of 5-hydroxy-4-methylheptan-3-one, respectively. Our results also indicate that male S. discoideus, using the sensory input from antennal ORNs, can distinguish both diketone and the RR-isomer from others, and RS- and SS-isomers from others, although it was unclear if they can distinguish between RS-isomer and SS-isomer, or between diketone and the SR-isomer. It also appeared that female S. discoideus could distinguish between RS-isomer and SS-isomers. The antennae of S. discoideus thus contain sex-specific sets of ORNs for host- and non-host plant volatile compounds. Both sexes of S. discoideus have highly sensitive and selective ORNs for some green-leaf volatiles, such as (Z)-3-hexenol and (E)-2-hexenal. In contrast, male antennae of S. discoideus house three distinct groups of ORNs specialized for myrcene and (E)-beta-ocimene, 2-phenylethanol, and phenylacetaldehyde, respectively, whereas female antennae contain three groups of ORNs specialized for (+/-)-linalool and (+/-)-alpha-terpineol, myrcene and (E)-beta-ocimene, (+/-)-1-octen-3-ol, and 3-octanone. Our results suggest that S. discoideus use a multi-component pheromone communication system, and a sex-specific set of ORNs with a narrow range of response spectra for host-plant location.

  • 9.
    Pontes, Gina B
    et al.
    Laboratory of Triatomines and Chagas Disease Epidemiology, Instituto René Rachou/FIOCRUZ, 30190002, Belo Horizonte, Minas Gerais, Brazil.
    Bohman, Björn
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Unelius, C. Rikard
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Lorenzo, Marcelo G
    Laboratory of Triatomines and Chagas Disease Epidemiology, Instituto René Rachou/FIOCRUZ, 30190002, Belo Horizonte, Minas Gerais, Brazil.
    Metasternal gland volatiles and sexual communication in the triatomine bug, Rhodnius prolixus.2008In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 34, no 4, p. 450-457Article in journal (Refereed)
    Abstract [en]

    Twelve compounds produced by the metasternal glands (MGs) of the triatomine bug Rhodnius prolixus were identified by solid phase microextraction (SPME) combined with coupled gas chromatography-mass spectrometry (GC-MS) using achiral and chiral columns. All substances were ketones or alcohols, and the same compound profile was found in the secretions produced by either sex. The most abundant compounds were 2-methyl-3-buten-2-ol, (2S)-pentanol, (3E)-2-methyl-3-penten-2-ol, and (2R/2S)-4-methyl-3-penten-2-ol. Emission of these compounds was detected more frequently from females than males, and females released them more frequently during the early hours of the scotophase, the period when sexual activity in this species is at its peak. These compounds were also detected in the headspace above mating pairs. Finally, the occlusion of the MG orifices of male or female bugs with paraffin resulted in a significant decrease in copulation frequency compared to sham-operated insects. Together, these data suggest that the MG secretions of R. prolixus may be involved in sexual communication.

  • 10.
    Schiebe, Christian
    et al.
    Linnaeus University, Faculty of Health and Life Sciences, Department of Chemistry and Biomedical Sciences. Swedish University of Agricultural Sciences, Sweden.
    Unelius, C. Rikard
    Linnaeus University, Faculty of Health and Life Sciences, Department of Chemistry and Biomedical Sciences.
    Ganji, Suresh
    Linnaeus University, Faculty of Health and Life Sciences, Department of Chemistry and Biomedical Sciences.
    Binyameen, Muhammad
    Bahauddin Zakariya Univ, Pakistan;Czech Univ Life Sci Prague, Czech Republic.
    Birgersson, Göran
    Swedish University of Agricultural Sciences, Sweden.
    Schlyter, Fredrik
    Swedish University of Agricultural Sciences, Sweden;Czech Univ Life Sci Prague, Czech Republic.
    Styrene, (+)-trans-(1R,4S,5S)-4-Thujanol and Oxygenated Monoterpenes Related to Host Stress Elicit Strong Electrophysiological Responses in the Bark Beetle Ips typographus2019In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 45, no 5-6, p. 474-489Article in journal (Refereed)
    Abstract [en]

    Bark beetles kill apparently vigorous conifers during epidemics by means of pheromone-mediated aggregation. During non-endemic conditions the beetles are limited to use trees with poor defense, like wind-thrown. To find olfactory cues that help beetles to distinguish between trees with strong or weak defense, we collected volatiles from the bark surface of healthy felled or standing Picea abies trees. Furthermore, living trees were treated with methyl jasmonate in order to induce defense responses. Volatiles were analyzed by combined gas chromatography and electroantennographic detection (GC-EAD) on Ips typographus antennae. Compounds eliciting antennal responses were characterized by single sensillum recording for identification of specific olfactory sensory neurons (OSN). Release of monoterpene hydrocarbons decreased, while oxygenated compounds increased, from spring to early summer in felled trees. In both beetle sexes particular strong EAD activity was elicited by trace amounts of terpene alcohols and ketones. 4-Thujanol gave a very strong response and the absolute configuration of the tested natural product was assigned to be (+)-trans-(1R,4S,5S)-thujanol by stereoselective synthesis and enantioselective gas chromatography. One type of OSN responded to all ketones and five other OSN were characterized by the type of compounds that elicited responses. Three new OSN classes were found. Of the eight EAD-active compounds found in methyl jasmonate-treated bark, the known anti-attractant 1,8-cineole was the one most strongly induced. Our data support the hypothesis that highly active oxygenated host volatiles could serve as positive or negative cues for host selection in I. typographus and in other bark beetles.

  • 11.
    Tengo, J.
    et al.
    Ecological Research Station, Öland, Sweden.
    Borg-Karlson, A. K.
    KTH, Sweden.
    Valterova, I.
    Unelius, C. Rikard
    Taghizadeh, T.
    Tolasch, T.
    Francke, W.
    (S)-(+)-linalool, a mate attractant pheromone component in the bee Colletes cunicularius2003In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 29, no 1, p. 1-14Article in journal (Refereed)
    Abstract [en]

    Enantiomerically pure (S)-(+)- linalool was the main constituent in the extracts of the cephalic secretions of virgin females, mated females, freshly emerged males, and patrolling males of the solitary bee Colletes cunicularius. After copulation, the content of (S)-(+)- linalool emitted by the female was strongly reduced. Electrophysiological experiments revealed that both enantiomers of linalool elicited responses from the antennae of the males. Field tests using the pure enantiomers and the racemate of linalool showed that the number of male bees attracted was highest for (S)-(+)- linalool. The search flight activity in the mating flight area increased dramatically when patrolling males were presented with (S)-(+)- linalool vs (R)-(+)- linalool. Taken together, these data indicate a mate attractant pheromone function of (S)-(+)- linalool.

  • 12.
    Trimble, R. M.
    et al.
    Canada.
    El-Sayed, A. M.
    Wainman, L. I.
    Santangelo, E. M.
    KTH, Sweden.
    Unelius, C. R.
    Linnaeus University.
    Relative attractiveness of (10E)-dodecen-1-yl acetate and (4E,10E)-dodecadien-1-yl acetate to male spotted tentiform leafminers Phyllonorycter blancardella (F.)2004In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 30, no 9, p. 1827-1838Article in journal (Refereed)
    Abstract [en]

    The antennae of male spotted tentiform leafminers, Phyllonorycter blancardella, from Ontario, Canada, exhibited similar electroantennogram responses when stimulated with E10-12:Ac or E4,E10-12:Ac. In field trapping experiments, E10-12:Ac was two-fold or more attractive than E4, E10-12:Ac, and E4,E10-12:Ac did not enhance the attractiveness of E10-12:Ac. E4,E10-12:Ac has not been identified in the pheromone of P. blancardella and it is hypothesized that the structural similarity of this compound and E10-12:Ac, the major pheromone compound of this species, may be responsible for the electrophysiological and behavioral responses to E4,E10-12:Ac. The possible reasons for the disparity between the results of our field trapping experiments and those carried out in Nova Scotia, Canada, and Massachusetts, USA., where E4,E10-12:Ac was found to be two to four times more attractive to P. blancardella than E10-12:Ac, are discussed.

  • 13.
    Unelius, C. Rikard
    et al.
    Linnaeus University, Faculty of Science and Engineering, School of Natural Sciences.
    El-Sayed, Ashraf
    The New Zealand Institute for Plant & Food Research Ltd.
    Twidle, Andrew
    The New Zealand Institute for Plant & Food Research Ltd.
    Bunn, Barry
    The New Zealand Institute for Plant & Food Research Ltd.
    Zaviezo, Tania
    Universidad Católica de Chile, Santiago, Chile.
    Flores, Fernanda
    Pontificia Universidad Católica de Valparaíso, , Chile.
    Bell, Vaughn
    The New Zealand Institute for Plant & Food Research Ltd.
    Bergmann, Jan
    Pontificia Universidad Católica de Valparaíso, , Chile.
    The Absolute Configuration of the Sex Pheromone of the Citrophilous Mealybug, Pseudococcus calceolariae2011In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 37, no 2, p. 166-172Article in journal (Refereed)
    Abstract [en]

    The absolute configuration of the sex pheromone of the Citrophilous mealybug, Pseudococcus calceolariae, has been identified as (1R,3R)-2,2-dimethyl-3-(2-methylprop-1-enyl)cyclopropyl)methyl (R)-2-acetoxy-3-methylbutanoate. The absolute configuration was determined by NMR, derivatization reactions, chiral GC/MS analysis, and comparison with synthetic chiral reference compounds. The correct structure was further proven by trap catches of adult male mealybugs in field trials. Traps baited with 1000 µg of the pheromone caught 36-fold more males than traps baited with virgin females. A mixture of stereoisomers of the pheromone can be used in field trapping experiments. A comparison with the structures of other sex pheromones of mealybugs is presented.

  • 14. Vitta, A.C.R.
    et al.
    Bohman, Björn
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Unelius, C. Rikard
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Lorenzo, Marcelo
    Behavioral and Electrophysiological Responses of Triatoma brasiliensis Males to Volatiles Produced in the Metasternal Glands of Female2009In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 35, no 10, p. 1212-1221Article in journal (Refereed)
    Abstract [en]

    In many insects, mate finding is mediated by volatile sex pheromones, but evidence for this phenomenon in triatomines (Heteroptera: Reduviidae) is still fragmentary. Recently, it was shown that metasternal glands (MGs) are involved in producing signals related to the sexual communication of Triatoma infestans and Rhodnius prolixus. Based on this, we tested whether MG volatiles could be involved in the sexual communication of Triatoma brasiliensis. Odor-mediated orientation responses were studied by using a T-tube olfactometer. These tests showed that males exhibit positive anemotaxis when confronted with adult odor-laden air currents. Moreover, females that had their metasternal glands occluded did not elicit significant orientation by males. Compounds produced by the MGs of T. brasiliensis females were identified by means of SPME, GC-FID, and GC-MS, with achiral and chiral columns. All substances identified were ketones and alcohols, and similar compound profiles were found in the secretions produced by both sexes. The most abundant compounds identified were 3-pentanone, followed by (4R)-methyl-1-heptanol, 3-pentanol, and (2S)-methyl-1-butanol. In addition, GC-EAD recordings showed that the antennae of males responded to several of the main components of female MG secretions. Our results showed that compounds produced by the MGs of T. brasiliensis females are involved in the sexual communication of this species.

  • 15.
    Witzgall, P.
    et al.
    SLU, Sweden.
    Bengtsson, M.
    SLU, Sweden.
    Unelius, C. Rikard
    KTH, Sweden.
    Lofqvist, J.
    SLU, Sweden.
    Attraction of Pea Moth Cydia-Nigricana F (Lepidoptera, Tortricidae) to Female Sex-Pheromone (E,E)-8,10-Dodecadien-1-Yl Acetate, Is Inhibited by Geometric Isomers E,Z, Z,E, and Z,Z1993In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 19, no 9, p. 1917-1928Article in journal (Refereed)
    Abstract [en]

    Field attraction of Cydia nigricana males to synthetic female sex pheromone (E,E)-8,10-dodecadien-1-yl acetate, formulated on red rubber septa, declined continuously during two weeks. This was due to isomerization of (E,E)-8, 10-dodecadien-1-yl acetate: eight days after application of purified E,E isomer, the proportion of E,Z; Z,E; and Z,Z isomers in rubber septa aged in the laboratory was 4 %; a 5 % addition of any one of these isomers to fresh lures of (E,E)-8, 10-dodecadien-1-yl acetate significantly reduced male attraction. Stereospecific syntheses of (E,Z)-, (Z,E)-, and (Z,Z)-g, 10-dodecadien-1-yl acetate are described. The pheromone gland of Cydia nigricana contains 0.8 ng/female of (E,E)-8,10-dodecadien-1-yl acetate, accompanied by three monounsaturated acetates, (E)-9-dodecen-1-yl acetate, (Z)-5-tetradecen-1-yl acetate, and (Z)-7-tetradecen-1-yl acetate (0.1 ng/female each). These compounds did not augment male trap catch when added to (E,E)-8,10-dodecadien-1-yl acetate.

  • 16.
    Zhu, J. W.
    et al.
    Iowa State University.
    Unelius, C. Rikard
    Park, K. C.
    Iowa State University.
    Ochieng, S. A.
    Iowa State University.
    Obrycki, J. J.
    Iowa State University.
    Baker, T. C.
    Iowa State University.
    Identification of (Z)-4-tridecene from defensive secretion of green lacewing, Chrysoperla carnea2000In: Journal of Chemical Ecology, ISSN 0098-0331, E-ISSN 1573-1561, Vol. 26, no 10, p. 2421-2434Article in journal (Refereed)
    Abstract [en]

    We report the identification of a defensive secretion from the green lacewing, Chrysoperla carnea. By using combined gas chromatography-electroantennographic detection (GC-EAD), we found one major compound in the solvent extract of this secretion that elicited a significant EAD response from the antenna. Based upon its characteristic fragments from gas chromatography-mass spectrometry (GC-MS) analysis, the compound was identified as a tridecene. Dimethyldisulfide derivatization suggested that a double bond was located between positions 4 and 5 in the carbon chain. Thus, the compound was tentatively identified as a 4-tridecene. Coinjection of the extract with a mixture of the Z or E form of the synthetic 4-tridecene revealed that the unknown was (Z)-4-tridecene. EAG dose-responses showed a direct correlation to dose. Single sensillum recordings from sensilla trichodea situated on the antennae suggested the presence of receptor neurons specifically responding to this compound. An arrestment behavior was observed when tested in the Y-tube olfactometer. Preliminary field trapping results indicate that the compound is an antagonist to attraction. The avoidance behavior of predatory ants, observed when tested with the synthetic compound of this secretion further suggested a defensive function.

1 - 16 of 16
CiteExportLink to result list
Permanent link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf