Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of stem rot of konjac caused by Phytophthora nicotianae in China.

Abstract

A serious foliage disease of konjac (Amorphophallus konjac) was observed in Fuyuan County, Yunnan, China, in July 2012. The symptoms began with leaf colour changes from light green to yellow, followed by discoloration on the stem base, plant wilting, bulb rotting and plant death. The causal pathogen was identified as Phytophthora nicotianae based on cultural, morphological, genetic (ITS) and pathogenicity analyses. This is thought to be the first report of P. nicotianae as a pathogen of konjac in China.