Canadian Forest Service Publications
Developing trapping protocols for wood boring beetles associated with broadleaf trees. 2018. Rassati, D.; Marini, L.; Marchioro, M.; Rapuzzi, P.; Magnani, G.; Poloni, R.; Di Giovanni, F.; Mayo, P.; Sweeney, J.D. Journal of Pest Science (online early)
Issued by: Atlantic Forestry Centre
Catalog ID: 39421
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Longhorn and jewel beetles are often moved intercontinentally within woody materials. The common use of hardwoods in solid wood-packaging requires efficient trapping protocols for broadleaf-associated species. We tested the effect of lure (ethanol vs multi-lure), trap color (green vs purple), and trap height (understory vs canopy) on the longhorn and jewel beetle species trapped in multi-funnel traps set up in both seminatural forests and reforested forests in Italy. Traps were deployed in a 2 × 2 × 2 factorial scheme, and the eight different treatments were replicated 17 times in a randomized complete block design, in which each block was a different site. Thirty-five longhorn beetle species (2 non-native) and 15 jewel beetle species (all native) were trapped. The multi-lure was more effective than ethanol at detecting most longhorn beetles at both the species and subfamily level (except Lepturinae), but had no effect on the detection of jewel beetles. Trap color affected both jewel (green better than purple) and longhorn beetles with mixed responses among subfamilies. Species richness and/or abundance of both families was greater in the canopy than the understory, but trends were more heterogeneous at lower taxonomic levels (i.e., significant effect on Cerambycinae and Lepturinae but not on Lamiinae). In general, we showed that green multi-funnel traps baited with multi-lure, and setup in the canopy may be an efficient trapping protocol for European longhorn and jewel beetles associated with broadleaf trees. This information can increase efficacy of early-detection programs carried out both inside and outside of Europe.
Plain Language Summary
Bark and wood-boring beetles from Asia and Europe continue to arrive in Canada in wood used to pack goods in container ships, and some of these species become invasive forest pests, e.g., the emerald ash borer. The earlier we detect such pest introductions, the more likely we can mitigate their damage by eradicating the population or containing its spread. We conducted trapping experiments in Italy and showed that the total number of species of wood-boring beetles detected in traps was increased by placing green-colored traps in the forest canopy and purple-colored traps in the understory. Applying these results in annual surveys should improve early detection of exotic species introductions.