The use of semiochemicals for attracting and repelling invasive ambrosia beetles (Coleoptera: Curculionidae) in ʻōhiʻa ( Metrosideros polymorpha ) forests

Research demonstrates that semiochemicals, particularly ethanol and repellents like verbenone, are effective tools for attracting and repelling invasive ambrosia beetles (Xyleborini) in ʻōhiʻa forests of Hawaiʻi Volcanoes National Park. The study found that traps baited with 100% ethanol captured significantly more beetles than those using a 1:1 ethanol:methanol mixture, while repellents reduced beetle capture rates across multiple invasive species, including Xyleborinus saxesenii and Xylosandrus crassiusculus. These findings highlight the potential for semiochemicals in early detection and management strategies to mitigate ecological and economic threats posed by these pests, which are linked to diseases like rapid ʻōhiʻa death (ROD) and agricultural impacts on crops such as coffee and macadamia.

Roy, K., Sofaer, H. R., Peck, R. W., Dunkle, E. J., Mikros, D., Smith, S., & Ginzel, M. D. (2023). The use of semiochemicals for attracting and repelling invasive ambrosia beetles (Coleoptera: Curculionidae) in ʻōhiʻa ( Metrosideros polymorpha ) forests. Agricultural and Forest Entomology, 26(2), 191–200. Portico. https://doi.org/10.1111/afe.12606