Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Pantoea agglomerans causing bacterial leaf blight on Vigna angularis in Jilin Province, China.

Abstract

From 2010 to 2012, a leaf blight on red adzuki bean (Vigna angularis) was observed in Changchun City, Jilin, China. The disease incidence ranged from 15 to 30%. Chlorotic, small, water-soaked leaf spots first appeared on leaves. Gradually, the spots enlarged (2-5 mm in diameter), and turned dark brown and angular-shaped, with a broad yellow halo. As disease progressed, lesions increased in number and coalesced to form large, dead areas that became dry, causing the leaves to become tattered. Lesions on petioles were more elongated, but had the same initial water-soaked, brown colour. Pod lesions were 4-6 mm, dark brown and irregularly shaped and infected seeds turned grey-white. The causal pathogen was identified as Pantoea agglomerans based on cultural, physiological, genetic and pathogenicity analyses. This is thought to be the first report of P. agglomerans causing bacterial leaf blight on V. angularis in Jilin, China.