Eur. J. Entomol. 113: 393-396, 2016 | 10.14411/eje.2016.050

Infestation of the mycoheterotrophic orchid Yoania japonica by the two-winged fly, Chyliza vittata (Diptera: Psilidae)

Kenji SUETSUGU
Department of Biology, Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan; e-mail: kenji.suetsugu@gmail.com

Chyliza vittata is known to utilize leaves, stems and underground parts of several leafy and leafless orchids. Compared to the well-recorded feeding habits of C. vittata in Europe, its feeding habits in Japan are poorly studied. Thus, further records of its host plants and the habits of its larvae in Japan are likely to reveal the similarities and differences in its feeding habits in Europe and Japan. The current study reports C. vittata feeding on the stems of the mycoheterotrophic orchid Yoania japonica in central Japan. This study also showed that in spite of the small size of Yoania its reproductive success is not severely reduced when infested with C. vittata, whereas the robust stems of Gastrodia elata, which is its main host plant in Japan, are thought to be a defence against infestation by C. vittata.

Keywords: Diptera, Psilidae, Chyliza vittata, host plants, mycoheterotrophy, Orchidaceae, Yoania japonica, Gastrodia elata, phytophagous insects, stem-miner

Received: March 21, 2016; Accepted: April 19, 2016; Published online: May 3, 2016

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