沖縄におけるメロンえそ斑点病の発生

概要

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A virus was isolated from (Cucumis melo L. cv. Arusu-seinu summer type 2) showed necrotic spot, vein necrosis on leaves and stem necrosis, and was collected at Yomitan-Son in Okinawa prefecture in eary summer season of 1990. The host range of the virus was restricted to Cucurbitaceae. The virus was infected to melon plants systemically, but most host plants were locally infection. Isometric particles about 30nm in diameter were observed with an electron microscope in negative stained preparations from diseased plants. The virus was reacted to antisera against melon nectoric spot virus (MNSV) of Nagasaki and Shizuoka strain by the immuno-electron microscopy. Based on these results, the virus was identified as a MNSV and was first reported from Okinawa prefecture, Japan.