Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Phytophthora cinnamomi causing soft rot on ginseng root in Republic of Korea.

Abstract

Korean ginseng (Panax ginseng) is well known as a healthy herb and source of alternative medicine for humans. In August 2017, soft rot disease incidence was observed on an average of 53% (range 42 to 67%) of ginseng at five cultivation sites at Hongnong-eup, Yeonggwang-gun, Jeollanam-do, Korea Republic. Wilt symptoms were observed in the above-ground parts of the diseased ginseng, and root symptoms included brown spots and necroses at the initial stage and disappearance of rootlets and formation of white hyphae on the root surface as the disease progressed. The causal pathogen was isolated and identified as Phytophthora cinnamomi based on morphological characteristics, sequence analysis of the rDNA internal transcribed spacer (ITS) region and pathogenicity test. This is thought to be the first report of P. cinnamomi causing soft rot on ginseng root in Korea Republic.