한국의 과일 탄저병과 관련된 다양한 종 복합체 내의 Colletotrichum 다양성 및 해당 살균제의 체외 민감도

Anthracnose, caused by the Colletotrichumgenus, comprises a significant number of plant pathogens and poses a major threat to fruit production worldwide, including South Korea. Colletotrichum species were identified associated with anthracnose in fruits such as apple, persimmon, plum, peach, jujube, walnut, and grape. A polyphasic approach, including morphology, multigene phylogenetics, and pathogenicity testing, was used. Additionally, the in-vitro sensitivity of identified Colletotrichum species to common fungicides was also evaluated. A total of nine Colletotrichum species within two complexes, namely gloeosporioides and acutatum, have been identified as the causal agents of anthracnose in common fruits in South Korea. In the gloeosporioides complex, we found Colletotrichum aenigma, C. fructicola, C. gloeosporioides, C. horii, C. siamense, and C. viniferum. Meanwhile, in the acutatum complex, C. fioriniae, C. nymphaeae, and C. orientalis were identified. Notably, C.fructicola,C.siamense, C.fioriniae,and C.nymphaeaewere reported for the first time from apple, C.siamense, C.fioriniaeand C.nymphaeaefrom plum, C.siamense,C.fructicola, and C.fioriniaefrompeach, C.siamenseandC. horii from persimmon, C.fioriniaefrom Omija (Schisandra), C.orientalisfrom walnut, C. nymphaeaefrom jujube, and C.aenigma, C. fructicola, and C. siamense from grape. Fungicide sensitivity tests revealed significant variation in the EC₅₀ values among specific Colletotrichumspecies when exposed to different fungicides. Moreover, the same Colletotrichum species isolated from different host plants displayed varying sensitivity to the same fungicide.