Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Bacterial sheath rot of wheat caused by Pseudomonas fuscovaginae in the highlands of Mexico.

Abstract

Angular, blackish brown lesions, 10 or 20 cm in length, bordered with a purple-black angular area 1-2 mm wide and showing a greyish centre, were frequently observed on leaf sheaths of bread wheat, durum wheat and triticale at the booting stage in the central highlands of Mexico, 2249-2640 m above sea level. Fluorescent, strictly aerobic bacteria identified as P. fuscovaginae (based on their positive reaction for Kovac's oxidase and arginine dihydrolase but negative for esculin hydrolysis and nitrate reduction) were isolated from these lesions. The pathogenic strs from wheat behaved similarly to those isolated from rice in other countries with regard to non-production of 12-ketogluconate, acid production from trehalose but not from inositol, agglutination with antiserum against a reference str. and pathogenicity on rice and wheat.