| Popis: |
The aggregation pheromone system of Ips cembrae appears to consist of three compounds produced by attacking males. Gas chromatographic analysis of hindgut volatiles revealed the presence of ipsenol, ipsdienol and an additional compound which was identified as 3-methyl-3-buten-1-ol. Field bioassays in Scotland and in Germany indicated that neither ipsenol nor ipsdienol alone is effective, but the combination is attractive, and the addition of the methyl butenol increases the response considerably. Zusammenfassung Das Aggregationspheromon des Grosen Larchenborkenkafers, Ips cembrae Heer. Der Populationslockstoff von Ips cembrae besteht aus den Terpenalkoholen Ipsenol und Ipsdienol, deren Lockwirkung durch 3-Methyl-3-buten-1-ol verstarkt wird. Alle drei Komponenten des Aggregationspheromons werden vom mannlichen Kafer beim Einbohren in neue Wirtsbaume abgegeben. |
