Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

First report of Pantoea stewartii subsp. Indologenes causing leaf blight on rice in Malaysia.

Abstract

In November and December of 2017, leaf samples from rice (Oryza sativa) exhibiting leaf blight symptoms were collected from commercial fields in Kedah and Selangor, Malaysia, with about 80% disease incidence. Symptoms were water-soaked lesions from the upper part of the leaf blade, which later turned into brown stripes, as typically caused by Xanthomonas oryzae pv. oryzae. Twenty strains of bacteria were isolated from the diseased samples from both fields, and eight isolates (MF1, MF2, MF3, MF4, MF5, MF7, MF8 and MF9) suspected to be Pantoea species were subjected to further characterization. The causal agent was identified as Pantoea stewartii subsp. indologenes based on morphological and biochemical characterization as well as nucleotide sequence analysis. This is thought to be the first report of leaf blight disease caused by P. stewartii subsp. indologenes on rice in Malaysia.