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  • 1
    ISSN: 1570-7458
    Keywords: chemical communication systems ; bark beetles ; Ips acuminatus ; Ips cembrae ; Ips erosus ; Ips sex-dentatus ; terpenoids ; verbenol ; myrtenol ; ipsdienol ; ipsenol ; amitinol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Upon exposure to vapours of the host tree's monoterpene (−)-α-pinene, Ips acuminatus produces the terpene alcohol cis-verbenol which, besides ipsdienol and ipsenol, is a component of its aggregation pheromone. I. cembrae transforms the same monoterpene predominantly into myrtenol and trans-verbenol but little into cis-verbenol, which interrupts pheromone response under field conditions. On the other hand, I. cembrae releases, upon feeding in the bark, the terpene alcohol amitinol in major amounts. Amitinol significantly enhances field response to the aggregation pheromone that also includes ipsdienol, ipsenol, and 3-methyl-3-buten-1-ol. However, amitinol reduces pheromone response in I. acuminatus and I. erosus. Also, males of I. sexdentatus release amitinol which appears to increase response to its attractive principle pheromone component, racemic ipsdienol. There is some evidence that present knowledge of the chemical communication systems among European Ips spp. still lacks satisfactory explanation of the naturally occuring aggregation en masse, perhaps with the exception of I. erosus and I. typographus.
    Type of Medium: Electronic Resource
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