Abstract
AbstractA dual‐choice olfactometer is described in which laboratory bioassays were conducted to test the response of adults of banded fruit weevil, Phlyctinus callosus, to frass from adults of both sexes. Mixed‐sex frass, male frass and female frass were highly significantly attractive to the adults. Both sexes were attracted, although significantly more males than females were attracted to male frass. Evidence strongly suggests that the attractive component in the frass is an aggregation pheromone. This is the first record of chemical communication in this species. These results have prompted an investigation into the chemical analysis of P. callosus frass.ZusammenfassungNachweis eines Aggregationsduftstoffes in Exkrementen des gestreiften Rüsselkäfers, Phlyctinus callosus (Schoenherr) (Col., Curculionidae)Ein Doppelwahl‐Olfaktometer wird beschrieben, worin Labor‐Bioassays ausgeführt wurden, um das Verhalten des gestreiften Rüsselkäfers, Phlyctinus callosus (Schoenherr), gegenüber Käferexkrementen beider Geschlechter zu prüfen. Exkrementgemische beider Geschlechter, Exkremente von Männchen und von Weibchen waren höchst signifikant anlockend für die Käfer. Beide Geschlechter wurden angelockt, obwohl signifikant mehr Männchen als Weibchen durch die männlichen Exkremente angezogen wurden. Es bestehen deutliche Hinweise, daß die Lockkomponente in den Exkrementen ein Aggregationsduftstoff ist. Es sind die ersten Beobachtungen einer chemischen Kommunikation in dieser Spezies. Diese Ergebnisse sollten zu einer intensiven Untersuchung der chemischen Analyse von Exkrementen des P. callosus führen.
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