Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of powdery mildew caused by Podosphaera erigerontis-canadensis on Conyza sumatrensis in Korea.

Abstract

Conyza sumatrensis (syn. Erigeron sumatrensis), a native of South America, is considered a highly invasive, troublesome weed worldwide. It was accidently introduced into Korea Republic in the 1930s, and has been naturalized mostly in the southern part of the country. In 2019, powdery mildew colonies on the leaves of C. sumatrensis were found in Busan, Korea Republic. The causal pathogen was isolated and identified as Podosphaera erigerontis-canadensis based on morphological, molecular and pathogenicity analyses. This is thought to be the first report of powdery mildew associated with P. erigerontis-canadensis on C. sumatrensis in Korea Republic.