Identification of Podosphaera xanthii as the causal agent of powdery mildew disease affecting Echinacea purpurea in Korea

In Young Choi, Sun Hee Hong, Yong Ho Lee, Hyeon Dong Shin

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)337-343
Number of pages7
JournalKorean Journal of Mycology
Volume48
Issue number3
DOIs
Publication statusPublished - 2020 Sep

Keywords

  • Erysiphaceae
  • Podosphaera xanthii
  • Powdery mildew
  • Purple coneflower

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology
  • Plant Science

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