Abstract
Field surveys were conducted from August 2007 to January 2008 with 2 methods on 6 islands to detect the invasion and settlement of the Asiatic palm weevil, Rhabdoscelus similis (Chevrolat) (Coleoptera: Rhynchophoridae) on Miyako Islands. The first method was adult capture with bait traps (split and fermented mature cane stalks) on sugarcane fields and palm stands. The second was inspection of the palm trees (Dypsis lutescens (H. Wendl.)) to detect the larvae or pupae that develop in the stems. Weevils were found in the traps at Hirara, Gusukube, and Ueno areas on Miyako Island (6 ⁄ 108 traps), but not on Ikema (0⁄ 4 traps), Kurima (0 ⁄ 3 traps16 , Irabu (0 ⁄ 15 traps), Shimoji (0 ⁄ 4 traps), and Tarama Islands (0 ⁄ 16 traps). Although no adults were caught in the bait traps, the larvae and pupae of R. similis were found in the palm stems on Irabu and Kurima Islands. This survey thus confirmed the invasion and settlement of R. similis on Miyako, Irabu, and Kurima Islands.
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