Mycological characteristics and Pathogenicity of Mycosphaerlla brassicicola isolated from the Imported Chinese cabbage.

One fungus was isolated from lesions on imported chinese cabbage leaves in process of quarantine inspection from China. The fungus was identified as Mycosphaerlla brassicicola, based on morphology of perithecia, asci, ascospore, and curtural characteristics. In Korea, this fungus has been quarantine fungus, and not yet report to occur. Perithecia of the fungus were globose, dark brown with apical papilate ostioles. The size was 90-100 ${\times}$ 130-135$\mu\textrm{m}$. Asci were bitunicate, 8-spored and 38-43 ${\times}$ 15-l9$\mu\textrm{m}$. Ascospore were irregularly biseriate, hyaline, cylindrical, 2-celled, and rounded at the ends. Optium growth temperature of the fungus was at 20$^{\circ}C$ on PDA but did rarely grow over 24$^{\circ}C$. Colony on PDA was of black aerial mycelia.