Pheromone Lures: Easy Way to Detect Trypodendron Species (Coleoptera: Curculionidae)

Abstract

Numbers of Trypodendron species captured with Trypowit® and Lineatin Kombi® lures were compared in 70 to 100 year old Norway spruce (Picea abies) stands at two localities (Kostelec and Tábor) in the Czech Republic. At each locality, five pairs of black, Theysohn window-slot traps were deployed; one trap of each pair contained Trypowit® lure and the other contained Lineatin Kombi® lure, and each trap of the pair was separated by 10 m. Among the Trypodendron species captured, T. lineatum was the most abundant, followed by T. domesticum and T. laeve. In most cases, the two kinds of lures caught similar numbers of beetles. T. lineatum males were more abundant than females at both localities in traps with Trypowit lures and in traps with Lineatin Kombi lures at Tábor. Males as well as females of T. domesticum were more abundant in traps with Lineatin Kombi lures than with Trypowit lures at Tábor but not at Kostelec. Both lures, which contain lineatin and attract all Trypodendron species including T. laeve, can be used to monitor the abundance of these bark beetle species. The Lineatin Kombi lure, however, contains more alcohol and is slightly more effective than the Trypowit lure for monitoring Trypodendron species on broadleaf trees.