Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Pantoea agglomerans causing rice leaf blight in Venezuela.

Abstract

During the dry production seasons between 2002 and 2007, rice leaf samples with clear symptoms of severe leaf blight were collected in experimental fields and commercial crops in Guárico and Portuguesa States in Venezuela. On affected plants, disease severity ranged from 20 to 100%. Symptoms first appeared as yellowish or brownish lesions that later turned pale yellow and dry. Lesions eventually became necrotic. Based on biochemical, physiological, molecular (sequence analysis of the 16S rRNA gene) and pathogenicity tests, the causal agent was identified as P. agglomerans. A few reports worldwide establish P. agglomerans as a rice pathogen. This is thought to be the first report of rice leaf blight caused by this pathogen in Venezuela.