Biology of the spotted-wing Drosophila suzukii (Diptera: Drosophilidae) in Hokkaido, Northern Japan: I. resource utilization
2019
Kanda, Y. (Hokkaido University of Education, Sapporo (Japan). Sapporo Campus, Biological Laboratory) | Namikawa, K. | Watabe, H.
Feeding and breeding resources of the spotted-wing Drosophila suzukii were surveyed during the active seasons in Hokkaido, northern Japan. The species utilized various kinds of fruits from both the Angiospermae and Gymnospermae. These fruits belonged to 10 families, 14 genera, and 18 species. Drosophila suzukii appeared from early July in Sapporo and began to breed on fruits of the Aino mulberry in natural forests and those of the cherry in domestic environments such as gardens and orchards. During the summer, it utilized various kinds of fruits, mainly the blueberry, raspberry, and blackberry, as breeding and feeding substrates in forests and gardens. Of the different types of tomato, a yellow cherry tomato provides D. suzukii with adequate feeding and breeding sites, since the outer skin of its fruits tends to split easily. The D. suzukii females possess a much-sclerotized ovipositor with stout setae, which means they can lay their eggs on fruits before they reach full ripeness. Thus, this species exclusively utilized fruits of trees (before falling). In the autumn, this species oviposited eggs on fruits of the coniferous tree Taxus cuspidata and the baby kiwi Actinidia argute in forests, before stopping its breeding in mid-October.
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