Three species of <Emphasis Type="Italic">Exobasidium</Emphasis> causing Exobasidium leaf blight on subgenus <Emphasis Type="Italic">Hymenanthes</Emphasis>, <Emphasis Type="Italic">Rhododendron</Emphasis> spp., in Japan
(1) Institute of Agriculture and Forestry, University of Tsukuba, Tsukuba, 305-8572, Japan;(2) National Institute of Agrobiological Sciences, Tsukuba, Japanv