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published: 20 Feb 2012 last updated: 13 Jun 2012
- Dacus dorsalis
Oriental fruit flyEN
Bactrocera dorsalis is endemic to Southeast Asia, but has also been introduced to Hawai'i, the Mariana Islands and Tahiti.EN
Eggs of B. dorsalis are laid below the skin of the host fruit. These hatch within 1-3 days and the larvae feed for another 9-35 days. B. dorsalis will not develop at temperatures below 13°C. Pupariation is in the soil under the host plant and adults emerge after 1-2 weeks (longer in cool conditions) and adults occur throughout the year. B. dorsalis is a tropical species which would be unable to survive the winter in the EPPO region, except possibly in the south. The adults are best able to survive low temperatures, with a normal torpor threshold of 7°C, dropping as low as 2°C in winter.EN
Attacked fruit will usually show signs of oviposition punctures. Fruit with a high sugar content, such as peaches, will exude a sugary liquid, which usually solidifies adjacent to the oviposition site.EN