Possible Migration of Aphid Parasites(Hymenoptera : Aphidiidae)Across the East China Sea

Abstract
The migration of delphacids, including 105 specimens of Aphidiidae, were studied. Aphidius picipes (Nees), A. gifuensis Ashmead, Diaretiella rapae (M''Intosh), Diaretus leucopterus (Haliday) and Praon sp. were caught in 2 different areas of the East China Sea. It was concluded that the females of the Aphidiidae could migrate from the continent of Japan across the East China Sea with the movement of air-masses and become established in Japan where suitable hosts and habitats are found.

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