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Stereoisomeric composition of the sex pheromone of the pine sawfly Microdiprion pallipes (Hym., Diprionidae)
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2003 (English)In: Chemoecology, ISSN 0937-7409, E-ISSN 1423-0445, Vol. 13, no 3, p. 155-162Article in journal (Refereed) Published
Abstract [en]

The basic chemical structure of the sex pheromone of the pine sawfly Microdiprion pallipes (Fallen) has earlier been identified as the propionate ester of (2S,3S,7 R/S,11 R/S)/(2R,3R,7 R/S,11 R/S)-3,7,11-trimethyl-2-tridecanol. We now report the results from further investigations on the male response to individual stereoisomers and to blends of stereoisomers, both in electroantennographic (EAG) recordings and in field trapping experiments. We also present our attempts to determine the stereochemistry of the compounds present in females of M. pallipes. By comparing gas chromatograms and mass spectra obtained from natural extracts with those from synthetic compounds it was found that the females contain one or more of the four (2S,3S,7 R/S,11 R/S)-3,7,11-trimethyl-2-tridecanol isomers (SS++-1). The active pheromone component is the corresponding propionate ester 2. In EAG experiments, males responded most strongly to five propionate ester samples, namely two four-isomer blends: SS++-2 and SR++-2, and three individual stereoisomers: SSSR-, SRRR- and SRSR-2. In a series of field trapping experiments it was found that males were attracted to the SR++-2 four-isomer blend and to the individual isomer SSSR-2. Based on the EAG-recordings and field responses of males and the stereoisomers found in the females, we suggest that the propionate ester of (2S,3S,7S,11R)-3,7,11-trimethyl-2-tridecanol (SSSR-2) is used as a main component of the sex pheromone in M. pallipes. Apparently the males react to other stereoisomers in addition to that or those produced by the females.

Place, publisher, year, edition, pages
2003. Vol. 13, no 3, p. 155-162
Keywords [en]
Pheromones
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Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-1955DOI: 10.1007/s00049-003-0244-2ISI: 000185481100007Scopus ID: 0141676076Local ID: 804OAI: oai:DiVA.org:miun-1955DiVA, id: diva2:26987
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2017-12-12Bibliographically approved

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Hedenström, ErikHögberg, Hans-ErikNguyen, Ba-Vu

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