First Report of Puccinia kuehnii, Causal Agent of Orange Rust of Sugarcane, in Brazil (original) (raw)

Plant Disease, 2010

Abstract

In December 2009, on a farm located near the city of Rincão, state of São Paulo, Brazil, uredinial leaf lesions typical of a rust disease were observed to be affecting sugarcane (a complex Saccharum L. hybrid). Lesions were observed in a nursery plot of a precommercial cultivar (cv. Centauro) known to be resistant to brown rust caused by Puccinia melanocephala Syd. & P. Syd. Leaf samples, inspected under a light microscope, revealed spores identical morphologically to those described for the fungus P. kuehnii E.J. Butler, causal agent of sugarcane orange rust (1,3). Telia and teliospores were not observed. The Ministry of Agriculture was notified on 7 December 2009 in accordance with current Brazilian quarantine legislation. On 9 December, a specialized team from the Federal Phytosanitary Defense Department (DSV/MAPA) started a survey at the farm, collected leaf samples for additional analyses, and confirmed the presence of P. kuehnii E.J. Butler in Brazilian territory. During the f...

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