Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of bacterial leaf spot disease caused by Pseudomonas syringae pv. syringae on Panax notoginseng.

Abstract

A new bacterial disease was observed on Panax notoginseng [Panax pseudoginseng var. notoginseng] plants in the Wenshan Mountain area of Yunnan, China, in 2012. The disease primarily affected leaves. Symptoms were circular or irregular brown leaf spots surrounded by a yellow halo on the edges of the leaves. The three strains (SQYB-1, SQYB-2 and SQYB-3) isolated were identified as Pseudomonas syringae pv. syringae based on morphology, metabolic profile and 16S rDNA sequence analysis. This is thought to be the first report of Pseudomonas syringae pv. syringae causing bacterial leaf spot on Panax notoginseng in China.