Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of southern blight on Chrysanthemum morifolium caused by Sclerotium rolfsii in China.

Abstract

A serious disease like southern blight occurred in hangju (Chrysanthemum morifolium) fields in Macheng, Hubei, China. The disease mainly occurred in July after the rainy season. Disease incidence ranged from 30-50%, causing huge economic losses to growers. Disease symptoms appeared on the stem bases, followed quickly by wilting of the whole plants. White mycelia covered the stem, and numerous whitish to tan sclerotia developed on the colonized tissues. The causal pathogen was isolated and identified as Sclerotium rolfsii [Athelia rolfsii] based on morphological characteristics, molecular data (ribosomal DNA sequences, translation elongation factor (TEF-1α) sequence, and phylogenetic analysis) and pathogenicity test. This is thought to be the first report of S. rolfsii causing southern blight on C. morifolium in China.