This study was conducted to isolate and identify the fungal pathogen caused unreported post-harvest disease on apples (cv. Fuji) fruit in Korea. The disease symptoms on apples appeared as irregular, light to dark brown, slightly sunken spots. The three fungal strains were isolated from infected tissues of apple fruits and their cultural and morphological characteristics were completely consistent with those of
Figures & Tables
Fig. 1.Disease symptoms, cultural and morphological characteristics, and pathogenicity test on apples (cv. Fuji) with inoculation using colony agar blocks of KNU-20-A1. (A-D): Primary symptoms; (E, F): Colony of strain KNU-20-A1 on potato dextrose agar (PDA) after 10 days; (G,H): Colony of strain KNU-20-A1 on oatmeal agar (OA) after 10 days; (I, J): Inoculation after 14 days; (K, L): Enlarged picture; M: After 30 days, pycnidia-like structures on PNA (pine needle agar); (N): After 30 days, pycnidia-like structures on OA agar; (O, P): Hyphal structures of KNU-20-A1 (scale bars: M, N=500 μm; O, P=10 μm).