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Rhabdoscelus obscurus

Basic information
Scientific name Rhabdoscelus obscurus (No picture)
Common names Sugarcane weevil borer
Higher taxon Dryophthoridae, Curculionoidea, Coleoptera
Natural range Possibly New Guinea.
Habitat Parasite on canes and palm trees.
Invasion information
Range in Japan Ogasawara (Bonin) Islands (Chichijima, Hahajima, Anijima, Ototojima, Mukoujima, and Iwojima Is.), Daito Islands (Kitadaitojima and Minamidaitojima Is.). Range in Japan
Origin Unintroduced to Japan.
Date Unknown. There is a distribution description in Hayashi et al. (1984). The first record in Daito Islands was in 1960.
Route Accidental: Hitchhiking on transport of palm trees.
Impact Predation on Clinostigma savoryana and cane. In major islands in Ogasawara, 30-40% of the palm trees may be damaged by this weevil.
Native organism(s) affected: Native palm tree Clinostigma savoryana and cane. In Daito Islands, damage on Livistona chinensis var. subglobosa.
Regulation in Japan Family Dryophthoridae is desgnated as a Quarantine Pest (the Plant Protection Law).
Introduced range in other countries Polynesia, Micronesia, Sulawesi, Australia (Queensland), Hawaii, etc.
Reference Notes
  • Halfpapp & Storey (1991) Cane weevil borer, Rhabdoscelus obscurus (Coleoptera: Curculionidae), a pest of palm in northern Queensland, Australia. Principes. 35(4), 199-207.
  • Hayashi et al. (eds) (1984) The Coleoptera of Japan in Color Vol. IV. Hoikusha, Osaka (in Jpn)
  • Kohama & Takahara (2002) Exotic insects in Okinawa. Bull Okinawa Pref Mus. 28, 55-92 (in Jpn)
  • Plant Protection Station (2011) The Plant Protection Act. Quarantine Pest List. (Accessed on 2012-4-11) (in Jpn)
  • Schreine (2000) New Guinea Sugarcane Weevil (Accessed on 2012-4-11)
  • Takahashi (1997) Rhabdoscelus obscurus in Ogasawara Islands. Proc Kanto-Tosan Plant Prot Soc. 44, 255-257 (in Jpn)
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