イネ褐色紋枯病(新称)について

抄録

A new type of sheath blight of rice was first discovered in Yamaguchi Prefecture in 1959. The symptom of the rice sheath infected by pathogen was similar to that of rice sheath blight, but, it had more darkish brown or black color than rice sheath blight (caused by the cultural type IA of Rhizoctonia solani Kühn). In addition, the sclerotia were not observed outside the infected sheath. This disease was caused by the cultural type III B of Rhizoctonia solani Kuhn. And this fungus was identified with both of the pathogens of rice sheath that were reported by Nonaka, in 1964 and Taketani & Tamura, in 1970. On the basis of differences in anastomosis groupe, cultural type, symptom, pathogenicity, and effect of organo-arsenic compound from the sheath blight of rice, brown sheath blight of rice was proposed as the disease name.