Abstract
In 2013 and 2014, two types of disease symptoms were observed on the leaves of seedlings of commercial Nemesia caerulea in Japan. In 2013, leaves developed round, brown lesions that sometimes covered whole leaves and stems; in 2014, seedlings developed soft rot and had gray mold on the surface. Morphological and molecular data indicated that the pathogen in 2013 was Stemphylium lycopersici (Enjoji) W. Yamam. and in 2014 was Botrytis cinerea Pers. Inoculation tests proved the pathogenicity of both pathogens on the host. Since this is the first report of these diseases in Japan, we propose designating the diseases as Stemphylium leaf blight and gray mold of N. caerulea.
