Comparison of Trypodendron lineatum , T. domesticum and T. laeve (Coleoptera: Curculionidae) Flight Activity in Central Europe

The main goal of work was to compare the flight activity of Trypodendron lineatum, T. domesticum and T. laeve in Central Europe. Field trapping experiments were conducted in 70- to 100-year-old Norway spruce stands located at three study sites in the Czech Republic. At each study site five pheromone traps were used. Pheromone-baited, black, window-slot traps (Theysohn, Germany) were used. Traps were placed at log landing areas 10-15 m apart from the nearest forest edge. Each trap was baited with a standard synthetic pheromone lure, XL Ecolure (Fytofarm, Slovakia). Three species of Trypodendron were recorded. T. lineatum was the most abundant, followed by T. domesticum and T. laeve . Flight activity began at the end of March or in mid-April. Only one another peak of the flight activity of T. lineatum and T. domesticum was observed at one study site in May 2011. Statistically significant relationships were found between catches of all species with the exception of T. lineatum vs. T. laeve and T. domesticum vs. T. laeve at one site. Males were more abundant than females mainly in T. lineatum samples. On the other hand, T. domesticum and T. laeve abundances of males and females were more equal, but in all cases of all Trypodendron species these abundances were not significantly different at all sites.

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