Bactrocera (Bactrocera) umbrosa (Fabricius, 1805) Breadfruit fruit fly (= Dacus fascipennis Wiedemann, 1819, Bactrocera fasciatipennis Doleschall, 1856, Dacus conformis Walker, 1856, Dacus diffusus Walker, 1860, Dacus frenchi Froggatt, 1909, Bactrocera lacerata White and Evenhuis, 1999) Figure 84 Distribution (Fig. 105). Vietnam. Cambodia. Thailand. Philippines. Malaysia (Peninsular, East). Indonesia (Sumatra, Java, Kalimantan, Sulawesi, West Timor). Australia (Christmas Island, Torres Strait Islands). Papua New Guinea (mainland, New Britain, New Ireland, Manus, Bougainville). Solomon Islands (Shortland Group, Choiseul, Vella Lavella, Gizo, Kolombangara, New Georgia, Isabel, Russell, Florida, Guadalcanal, Malaita, San Cristobal, Rennell and Bellona, Santa Cruz, Reef Islands). Vanuatu (Torres Islands, Banks Islands, Santo, Malekula, Ambae, Maewo, Pentecost, Ambrym, Epi-Paama-Tongoa, Efate, Erromanga, Tanna, Aneityum). New Caledonia (mainland, Maré, Lifou). Palau. Male lure. Methyl eugenol. Weak attraction to isoeugenol and methyl-isoeugenol (Royer et al. 2018). Host plants. Category B pest (Vargas et al. 2015) of Artocarpus spp. Records in New Caledonia, Papua New Guinea, Solomon Islands, and Vanuatu: MORACEAE: Artocarpus altilis, A. heterophyllus. Edible hosts common names. breadfruit, jackfruit. Biology. Adults mate at dusk, (Allwood 1997). Occurs in very large populations in lowland areas, and populations peak in December-January in the Solomon Islands, which corresponds to the main breadfruit season (Vagalo et al. 1997). Monthly trapping data illustrated on Figures 131, 132. Notes. The only pest dacine species known to be naturally distributed across Lydekker’s line (Krosch et al. 2019).

Published as part of Leblanc, Luc, 2022, The dacine fruit flies (Diptera: Tephritidae: Dacini) of Oceania, pp. 1-167 in Insecta Mundi 2022 (948) on page 145, DOI: 10.5281/zenodo.7300862