The First Report of Rhizoctonia Rot and Southern Blight of Sandersonia aurantiaca in Japan

Abstract

From 1992 symptoms of Rhizoctonia rot and southern blight of Sandersonia aurantiaca Hook. were observed in Chiba Prefecture. Rhizoctonia solani AG-2-2 and Sclerotium rolfsii, isolated from infected roots, basal stems and rhizomes, were demonstrated as the causal agents of the diseases by inoculation tests. An experiment for the chemical control of Rhizoctonia rot was conducted. The results showed that dipping of rhizomes into Tolclofos-methyl solution was effective.