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handle: 10261/292982
AbstractHost selecting males of Ips mannsfeldi release (S)‐(+)‐ipsdienol, (S)‐(‐)‐ipsenol, amitinol and 2‐methyl‐6‐methylene‐1,3E,7‐octatriene (“ipstriene”) as major beetle specific volatiles and obviously employ the terpene alcohols in a frass pheromone system. A vertex‐pronotal stridulatory organ is present in the females.ZusammenfassungDas Pheromonsystem des Schwarzkiefern‐Borkenkäfers Ips mannsfeldi (Wachtl) (Col., Scolytidae)Wirtswählende Ips mannsfeldi Männchen geben größere Mengen an (S)‐(+)‐Ipsdienol, (S)‐(‐)‐Ipsenol, Amitinol und 2‐Methyl‐6‐methylen‐1,3E,7‐octatrien (“Ipstrien”) als käferspezifische Duftstoffe beim Befall eines Wirtsbaumes ab. Die Terpenalkohole Ipsdienol und Ipsenol bilden als Synergisten ein Fraßpheromonsystem, das die Aggregation der Käfer an temporären Habitaten in geschwächten Wirtsbäumen auslöst. Elektronenmikroskopische Untersuchungen zeigen bei den Weibchen ein Stridulationsorgan vom Vertex‐Pronotal‐Typ, das bei den Männchen fehlt.
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