Abstract
An unfamiliar disease of tobacco plants, the symptom of which is brownish or blackish angular spot on the leaves, occurred in Yamaguchi prefecture in 1970. The author obtained five bacterial isolates from the diseased leaves, and tested their characteristics in comparison with Pseudomonas tabaci.
Not any differences were observed between the pathogenic isolates and P. tabaci in bacteriological and serological characteristics.
Angular leaf spot symptoms produced by these pathogenic isolates were found to be apparently distinguishable from those produced by P. tabaci.
From these results, the pathogenic isolates were tentatively identified as P. angulata causing angular leaf spot disease of tobacco.
