(95) Cucumber mosaic virus 2b Protein is Essential to Induce Lethal Necrosis in Cucumber Cotyledon Co-inoculated with Zucchini yellow mosaic virus(Abstracts Presented at the Meeting of the Kansai Division, Matsuyama, October 9-10, 2004, Abstracts of Papers Presented at the Division Meetings of the Phytopathological Society of Japan, 2003)