Occurrence of Fusarium Surface Rot on Sweet Potato Caused by Fusarium commune
Fusarium commune에 의한 고구마 표피썩음병의 발생

Hyo-Won Choi, Sung Kee Hong, Young Kee Lee, Young Ju Nam, Jae Geum Lee, Chi Jung An
2014 The Korean Journal of Mycology  
In June 2013, surface rot symptoms were observed on sweet potatoes (Ipomoea batatas) in Yeoju city, Korea. The lesions were circular, light to dark brown, firm, dry, and superficial. The diseased area became sunken in older tissues, and the symptoms usually did not extend deeply into the flesh. Seven isolates of Fusarium species were isolated from diseased sweet potatoes. All isolates were identified as Fusarium oxysporum based on morphological characteristics on CLA medium. To confirm the
more » ... To confirm the identification, molecular analysis of elongation factor 1 alpha gene was conducted. Among the isolates, however, four isolates were F. commune, and three isolates were F. oxysporum based on the DNA sequence data. Pathogenicity was tested using agar block inoculation on wounded or unwounded sweet potato pieces. Lesions were observed on wounded sweet potato pieces after 7 days inoculation in only F. commune isolates. This is the first report that F. commune causes Fusarium surface rot of sweet potato in Korea. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http:// creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Kor. J. Mycol. 2014 March, 42(1): 91-94 http://dx.
doi:10.4489/kjm.2014.42.1.91 fatcat:3nsfpik4yvdplmtzltrtcrnht4