Southern blight of Gyojaninniku (Allium victorialis L. subsp. platyphyllum Hulten)
1990
Namai, T. (Yamagata univ., Tsuruoka (Japan). Faculty of Agriculture) | Togashi, J. | Takagi, H.
A typical yellowing and wilting in gyojaninniku (Allium victorialis L. subsp. platyphyllum Hulten) grown in the experimental field of Faculty of Agriculture, Yamagata University occurred in June, 1988. White and silky mycelia grew luxuriantly on the diseased leaf sheath at the basal stem and produced many light brown mustard seed-like sclerotia on the lesions and on the soil surrounding the diseased plant. Consequently, the diseased plant wilted and fell down. The inoculation test using the fungus isolated from diseased plant showed the same symptom as the natural occurrence under field condition. From the symptom and sign appeared on the diseased plant, characteristics of the colony and sclerotium and the pathogenicity test of the isolated fungus, the pathogen of the present disease was identified as Corticium rolfsii. Therefore, the present disease was diagnosed as southern blight of gyojaninniku caused by the fungus. This is the first report on southern blight of gyojaninniku (Allium victorialis L. subsp. platyphyllum Hulten) in Japan
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