Item type	Journal Article
Bibliography	Yombai, J.; Cassis, G.; Stoklosa, J.; Reid, C.; Komolong, B. (2025) Plant provenance and habitat may contribute to galip weevil damage (Ectatorhinus magicus) to galip nut tree (Canarium indicum) in Papua New Guinea, In: Journal of Agriculture and Forestry in the Pacific, Vol.1 (2), 30-35, URL: https://www.spc.int/digitallibrary/get/ypv87
Abstract / Content summary	The galip weevil, Ectatorhinus magicus, is currently the only species within its genus that has been identified on the island of New Guinea and has become a significant threat to the galip nut industry in East New Britain Province, affecting over 2000 smallholder farmers. Previously regarded as a minor pest, recent outbreaks have severely impacted galip nut production, emphasising the need for focused research on the pest’s control and management options. This study assessed the distribution, pest status, and host range of E. magicus by analysing data from 314 galip trees sampled from 2016 to 2021 across 30 sites in three major galip nut growing provinces. Preliminary results suggest variable susceptibility among the sampled galip provenances, particularly when comparing Madang and the novel elite varieties from the Autonomous Region of Bougainville with local varieties of East New Britain. This study indicates a potential decline in infestation levels over time, suggesting that some elite varieties may be developing resistance against the weevil. Further longterm research is required to confirm these trends and to determine effective management strategies for improving the tree health and sustaining the industry. Keywords: Tree nut, wood borer, distribution, preference, infestation
File	JAFP2025_V1N2P30-35.pdf
File info	750.82 KB, PDF
External web link	https://www.spc.int/digitallibrary/get/ypv87
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