First report of orange rust of sugarcane caused by Puccinia kuehnii in Costa Rica and Nicaragua.
Symptoms and signs of orange rust on sugarcane (a complex hybrid of Saccharum species) were observed from July 2007 on cv. SP 71-5574 in Costa Rica and on cultivars CP 72-2086, Pindar, Q 132, Q 138, SP 71-5574, and SP 79-2233 during August 2007. The same symptoms and signs were observed on cv. CP 72-2086 during September 2007 in Nicaragua. The pathogen was identified as Puccinia kuehnii. This is thought to be the first report of orange rust of sugarcane in Costa Rica and Nicaragua, and the third confirmation of the disease in the Western Hemisphere and Caribbean Basin.