Abstract
In Hokuriku area of Japan, a bacterial disease of rice seedlings showing new symptoms has been found in farmer's nursery boxes several years ago. Ten pathogenic isolates obtained from affected plants were identified as Pseudomonas avenae Manns by their bacteriological properties. The inoculation to rice seeds with the bacterium resulted in four types of symptoms i.e., brown stripe on leaf, inhibition of germination, curving of leaf sheath, and abnormal elongation of mesocotyl. Among them, brown stripe on leaf has been reported to be caused by the bacterium. The other three types of symptoms were first confirmed from the results of this experiment.
