抄録
Web blight of Hypericum calycinum, leaf blight of the Yarrows, Achillea millefolium and Asteriscus maritimus, sheath blight of Japanese iris, Iris ensata, and stem and root rot of Figmarigold, Lampranthus spectabilis, Pelargonium graveolens and Sultan snapweed, Impatiens wallerana, occurred in Tokyo Metropolis between 1991 and 1993. A Rhizoctonia species isolated from diseased plants was identified as Rhizoctonia solani Kühn. Inoculation tests showed that the fungus was the causal agent of these diseases.
