Korean Journal of Mycology (Kor. J. Mycol.)
Jin-Hyeuk Kwon 1*, Dong-Wan Kang 1, Inyoung Han 1, Yong-Jo Choi 1, Sang-Dae Lee 1 and Daeyoung Son 2
1Gyeongsangnam-do Agricultural Research and Extension Services, Jinju 52733, Korea
2Department of Plant Medicine, Gyeongsang National University, Jinju 52828, Korea
Correspondence to kwon828@korea.kr
Korean Journal of Mycology (Kor J Mycol) March 31, 2016, 44(1):61-63.
https://doi.org/10.4489/KJM.2016.44.1.61
Received: February 24, 2016; Revised: March 6, 2016; Accepted: March 12, 2016
Published: March 31, 2016.
© The Korean Society of Mycology
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.
Sclerotium rot disease on cowpea (Vigna sinensis King) was observed in the exhibition field of Gyeongsangnam-do Agricultural Research and Extension Services in September 2015. Lesions were covered by white mycelial mats, and numerous sclerotia were formed on the stem near the soil line. The sclerotia were globoid in shape, 1~3 mm in size and white to brown in color. The optimum temperature for mycelial growth and sclerotia formation on potato dextrose agar (PDA) was 30 oC, with the hyphal width of 4~8 µm. For molecular identification, the complete internal transcribed spacer (ITS) rDNA region of the causal fungus was sequenced and analyzed. Based on the mycological characteristics, ITS rDNA sequence analysis, and pathogenicity test, this fungus was identified as Sclerotium rolfsii. This is the first report of sclerotium rot on cowpea caused by S. rolfsii in Korea.
Cowpea, Sclerotium rolfsii, Sclerotium rot, Vigna sinensis