First Report of Soybean Rust Caused by Phakopsora pachyrhizi in Nebraska

Authors

S. R. Watson, University of Nebraska–Lincoln
L. J. Giesler, University of Nebraska–LincolnFollow
A. D. Ziems, University of Nebraska–Lincoln
T. E. Brovont, University of Nebraska–Lincoln

Date of this Version

11-2008

Citation

Published by The American Phytopathological Society November 2008, Volume 92, Number 11, Page 1588 http://dx.doi.org/10.1094/PDIS-92-11-1588C

Comments

Open Access.

Abstract

Soybean rust caused by Phakopsora pachyrhizi Sydow was first observed in the continental United States in Louisiana in November 2004 (2). As part of the national soybean rust monitoring effort, samples were collected on 3 October 2007 during the scouting of fields with green leaves in southeastern Nebraska. After incubation at room temperature for 24 h, uredinea and urediniospores were observed with microscopic examination. Urediniospores were obovoid, hyaline to pale brown, and measured 20 to 30 × 18 to 20 μm.