During the extensive forays for discovering the biodiversity of phytopathogenic fungi in Korea, powdery mildew-affected purple coneflowers (Echinacea purpurea) were frequently found. Since 2004, nine samples have been deposited in the Korea University Herbarium. The initial symptoms include white, evanescent mycelia and irregular patches on mature leaves. Mild symptoms in the form of discolored lesions are also noticed on the stem and petal of the affected plants. Based on the morphological characteristics of the anamorph and the phylogenetic analysis of the internal transcribed spacers (ITS) and large subunit (LSU) rDNA sequences, the causal fungus was identified as Podosphaera xanthii. This is the first report that identifies the causal agent of powdery mildew disease affecting purple coneflower in Korea.
Bibliographical noteFunding Information:
This study was carried out with the support of the �Cooperative Research Program for Agricultural Science & Technology Development(Project Nos. PJ014976112020, PJ0134762020)� Rural Development Administration, Republic of Korea.
© 2020 Korean Society of Mycology. All rights reserved.
- Podosphaera xanthii
- Powdery mildew
- Purple coneflower
ASJC Scopus subject areas
- Ecology, Evolution, Behavior and Systematics
- Plant Science