Abstract
A bacterial disease occurred on young seedlings in a few nursery boxes devised for the rice transplanters in Niigata Prefecture in May, 1976. The disease was found in about 25, 000 nursery boxes in 1980. The affected seedlings originally showed the symptoms of brown stripes on the sheaths, frequently extending out to their leaf blades. Heavy infection may cause yellowing and killing of the seedlings. On the basis of bacteriological characteristics and pathogenicity, the bacterium was identified as Pseudomonas avenae Manns 1909.
