Crepidiastrum sonchifolium, a flowering plant in the daisy family (Asteraceae), is native to East Asia. In Korea, this plant is a locally cultivated vegetable, and its market size is gradually growing. Since the plants with downy mildew infection were initially found at a private farm of Chuncheon city, the occurrences have continued in commercial farms of other regions, highlighting that this disease is spreading throughout Korea. The pathogen was attributed to a member of the genus Bremia that contains many specialized species, each of which displays a narrow host spectrum on Asteraceae. Based on morphological and molecular phylogenetic analyses, along with the high host specificity recently proven for Bremia species, the identity of the causal agent was confirmed as a so far undescribed species of Bremia. Here, we introduce Bremia itoana sp. nov., specific to C. sonchifolium.
Bibliographical noteFunding Information:
YJC was supported by a grant from the National Institute of Biological Resources (NIBR), funded by of the Ministry of Environment (MOE), and the National Research Foundation of Korea (NRF), funded by the Ministry of Science, ICT & Future Planning [Project No. 2016R1C1B2008013], Republic of Korea. YJC and JL were supported by a grant from the Agenda programme [Project No. PJ013476], Rural Development Administration, Republic of Korea.
© 2018 The Author(s).
- Cox2 mtDNA
- Downy mildew
- Newly emerging disease
ASJC Scopus subject areas
- Infectious Diseases