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Geographic variation in the field response of male European pine sawflies, Neodiprion sertifer , to different pheromone stereoisomers and esters

In English

Författare

  • Olle Anderbrant
  • Jan Löfqvist
  • Hans-Erik Högberg
  • Erik Hedenström
  • N Baldassari
  • P Baronio
  • G Kolmakova
  • B Lyons
  • T Naito
  • V Odinokov
  • J Simandl
  • A Supatashvili
  • A Tai
  • R Tourianov
Visa allt

Summary, in English

The European pine sawfly, Neodiprion sertifer (Geoffroy) (Hymenoptera: Diprionidae), is a widespread and economically important forest insect. The sex pheromone communication system of this species has been previously investigated in North America, Japan and Europe, with the acetate or propionate of the alcohol (2S,3S,7S)-3,7-dimethyl-2-pentadecanol (diprionol) shown to be the main pheromone component. In some locations, male attraction either increased or decreased by the addition of the (2S,3R,7R)-diprionyl acetate isomer. However, these studies were made with different batches of synthetic pheromones, with different types of traps and according to different procedures, so the observed differences might not reflect true geographic variation. Here we investigate the geographic pattern of male sawfly response by using identical chemicals, traps and experimental procedures at eight field sites ranging from Japan in the east to Canada in the west. We found an increased inhibitory effect of the (2S,3R,7R)-isomer from Japan and Siberia to Europe. At the eastern sites, increasing amounts of the (2S,3R,7R)-isomer up to and equal to the amount of the (2S,3S,7S )-isomer, did not influence the trap catch, whereas at sites in Europe, as little as 1% of the (2S,3R,7R)-isomer almost completely inhibited the attraction. The response of the North American population was intermediate. The only site in which the (2S,3R,7R)-isomer was essential for the attraction of males was in Siberia. A similar pattern was found for the (2S,3R,7S)-isomer. Both the acetate and the propionate form of the (2S,3S,7S)-isomer were attractive by themselves in Japan, Europe and North America, and neither the (2S,3R,7S)-isomer nor the (2S,3R,7R)-isomer alone were attractive, in the acetate or propionate form. We discuss the significance of our findings for the development of more efficient monitoring schemes and for the causes of population divergence and speciation in the European pine sawfly.

Publiceringsår

2000

Språk

Engelska

Sidor

229-239

Publikation/Tidskrift/Serie

Entomologia Experimentalis et Applicata

Volym

95

Issue

3

Dokumenttyp

Artikel i tidskrift

Förlag

Wiley

Ämne

  • Biological Sciences
  • Zoology

Status

Published

Projekt

  • Chemical communication in sawflies

Forskningsgrupp

  • Pheromone Group

ISBN/ISSN/Övrigt

  • ISSN: 1570-7458