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Sökning: WFRF:(Sierpinski A.)

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  • Wassgren, A.-B., et al. (författare)
  • Sex Pheromone of the Pine Sawfly Macrodiprion nemoralis (Hymenoptera : Diprionidae) : Identification of (2S,3R,7R,9S)-3,7,9-Trimethyl-2-tridecanol as the Precursor for the Active Pheromone Acetate
  • 2000
  • Ingår i: Die Naturwissenschaften. - : Springer Science and Business Media LLC. - 0028-1042 .- 1432-1904. ; 87:1, s. 24-29
  • Tidskriftsartikel (refereegranskat)abstract
    • The main component of the sex pheromone precursor in females of Macrodiprion nemoralis was identified as a threo-3,7,9-trimethyl-2-tridecanol isomer, approximately 800 pg per female, by gas chromatography-mass spectrometry. Comparison of mass spectrometric ion chromatograms showed that the natural compound in the female extract has the same retention time and mass spectrum as one of the two synthetic threo peaks. The acetate of the synthetic 16-isomer mixture caught a large number of males in the field, confirming the structure of the active pheromone. Comparison of gas chromatograms of the natural female extract with the eight synthetic threo stereoisomers showed that the pheromone is the (2S,3R,7R,9S)-stereoisomer of 3,7,9-trimethyl-2-tridecyl acetate.
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5.
  • Johansson, Björn G., et al. (författare)
  • Multispecies trapping of six pests of scots pine in Sweden and Poland
  • 2002
  • Ingår i: Journal of Applied Entomology. - : Wiley. - 0931-2048 .- 1439-0418. ; 126:5, s. 212-216
  • Tidskriftsartikel (refereegranskat)abstract
    • Multispecies sex pheromone trapping (trapping of more than one species in the same trap) for the pine shoot moth Rhyacionia buoliana , the pine moth, Dendrolimus pini , the nun moth, Lymantria monacha , the pine beauty moth, Panolis flammea and the pine sawflies Diprion pini and Neodiprion sertifer was evaluated. The catch from traps baited with the pheromone of a single species was compared with the catch from traps baited with pheromones for several species. The catch in the multispecies traps was significantly reduced in comparison with the single species traps for Dendrolimus pini , L. monacha and N. sertifer . Neodiprion sertifer was most likely inhibited by the Diprion pini pheromone. A follow-up study of Dendrolimus pini and L. monacha showed no pheromonal interference between them. Further studies are needed to evaluate the feasibility of multispecies monitoring. However, for practical applications a slight decrease in catch, due to pheromonal interference, could probably be tolerated as long as the catch reflects total population density.
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