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김형무,송완엽,노태환 전북대학교 농업과학기술연구소 1998 農大論文集 Vol.29 No.1
The causal pathogen of black leg disease, Phoma wasabiae, on wasabi was transmitted by seed, leaf, petiole and rhizome. 3 - 12% of collected and tested seeds from several seed lots was infected by the causal pathogen. Seeds infected with the causal pathogen showed damping-off at seedling stage. The pathogen inoculated onto leaves invaded and moved to root through the leaf vein and vascular bundle of petiole and rhizome. The pathogen of infected root moved and invaded petiole and leaf through the vascular bundle and the disease development through root infection was slower than that through leaf infection of the pathogen. The symptom on the leaf and the petiole was extended and the symptomed parts were collapsed at the late stage of the disease development.