The Comparison of Resistance of Sweet Potato Cultivars to Sclerotium Rot Caused by Sclerotium rolfsii

Research in Plant Disease 2014;20(2):126-128.
Published online December 15, 2014.

품종 간 고구마 흰비단병(Sclerotium rolfsii) 발생 정도 비교

김신철¹ · 김주희²* · 정성수² · 최규환² · 이왕휴^1,3 · 심홍식⁴

¹전북대학교 농생물학과, ²전북농업기술원 기후변화대응과, ³전북대학교 식물의학연구센터, ⁴국립농업과학원 작물보호과

The Comparison of Resistance of Sweet Potato Cultivars to Sclerotium Rot Caused by Sclerotium rolfsii

Shin-Chul Kim1, Ju-Hee Kim2*, Seong-Soo Cheong2, Kyu-Hwan Choi2, Wang-Hyu Lee1,3 and Hong-Sik Shim4

¹Department of Agricultural Biology, Chonbuk National University, Jeonju 561-756, Korea
²Division of Climate Change Task Force, Jeollabuk-do Agricultural Research and Extension Services, Iksan 570-704, Korea
³Plant Medical Research Center, Chonbuk National University, Jeonju 561-756, Korea
⁴Crop Protection Division, National Academy of Agricultural Science, Suwon 441-707, Korea

Correspondence: Ju-Hee KimTel : +82-63,

Ju-Hee Kim

Tel : +82-63-290-6183
Fax: +82-63-290-6198
E-mail: kimjuhee@korea.kr

Received: February 11, 2014 Revised: May 20, 2014 Accepted: May 23, 2014

Abstract

This study was carried out to assay the disease incidence degree of Sclerotium rot caused by Sclerotium rolfsii in sixteen most popular commercial cultivars of sweet potato (Ipomoea batatas) in Republic of Korea. The degree of disease incidence was evaluated on pot experiments. In pot experiments using artificial inoculation, the Sclerotium rolfsii caused a stem rot on seedling of sweet potato plants and causes a crown rot on lower stems near or at the soil line at favorable environmental conditions. White mycelial mats and sclerotia were formed at the infection sites. Plants severely infected were fell over or died because lower stems near soil surface were rotten. The degree of disease incidence was varied according to cultivars. Two cultivars, Bio-mi and Deayumi, were very resistant, while five cultivars, Shinjami, Shingeonmi, Hongmi, Yeonjami, and Shinhung-3 were highly susceptible.

Key Words: Cultivar, Sclerotium rolfsii, Stem rot, Sweet potato