Submitted to: Hawaiian Entomological Society Proceedings
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/29/2003
Publication Date: 2/1/2004
Citation: Uchida, G.K., McInnis, D.O., Vargas, R.I., Kumashiro, B.R., Jang, E.B. 2004. Nontarget arthropods captured in cue-lure-baited bucket traps at area-wide pest management implementation sites in Kamuela and Kula, Hawaiian islands. Hawaiian Entomological Society Proceedings. 36:135-143. Interpretive Summary: This study was conducted at the area-wide integrated pest management (IPM) projects at Kamuela (Hawaii Island) and Kula (Maui Island), Hawaiian Islands, to determine if the use of melon fly bucket traps baited with a male lure (cue-lure), which is used for the control of melon fly, would capture at-risk non-target (purposely introduced and endemic) species of insects. Cue-lure traps were set out in the farm areas, and all of the nontarget insects were collected and identified to separate out the purposely introduced and endemic insects. It was found that these at-risk species were captured in low numbers. It was surmised that the ten endemic species captured originated nearby or distant native habitats and were visitors at the area-wide project sites. According to the scientific literature, these insects were not expected to survive in these areas because of the lack of the right kinds of food and living conditions. The three purposely introduced species were considered as residents of the area-wide project sites.
Technical Abstract: Seventy and 2,371 specimens or about 1.1 and 34.4 individuals per day were captured in melon fly, Bactrocera cucurbitae (Coquillett), cue-lure monitoring/suppression traps at two area-wide integrated pest management implementation sites in Kula (Maui Island) and Kamuela (Hawaii Island), respectively. Thrity-six adventive, ten endemic, zero indigenous, and three purposely introduced taxa were identified to the species level, and 33 species were unidentified. Taxa identified to species, genus or family were made up of 51 saprophagous, 17 zoophagous, eight phytophagous, and 8 undetermined species. At the Kamuela site seven endemic (Nesopetinus scottianus Sharp, Lycoriella hoyti (Hardy), Limonia sp. A?, Kalania sp. A?, Ptycta sp. A?, Ptycta sp. B?, and Ptycta sp. C?), and one purposely introduced (Coelophora inaequalis (Fabricius)) potentially at-risk nontarget species were captured. Also, four endemic (Tricorynus sharpi (Pic), Megaselia nr. Brunneipalpata Beyer, Megaselia runs nr. Heterodactyla Beyer,a nd L. hoyti (Hardy)), and two purposely introduced (Telsimia nitida Chapin and Dirhinus anthracia Walter) potentially at-risk nontarget species were captured at the Kula site. The data suggests that endemic species were not residents of the implementation sites, but immigrated from native and disturbed environments by wind dispersal. Purposely introduced arthropods were believed to be residents of the implementation sites because their hosts are known to inhabit disturbed and nonnative areas.