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US Preparations for Potential Introduction of Ug99 Strains of Wheat Stem Rust

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Wheat stem rust, caused by Puccinia graminis f. sp. tritici, is present and a threat to production wherever wheat, barley, and other small grains are grown. In 1999, a new, more virulent strain of this fungus, known as Ug99, was confirmed in Uganda and Kenya. The new strain has the capability to overcome the most widely used and effective stem rust resistance genes. This new pathogen strain has since been found and confirmed in Ethiopia, Yemen, and recently Iran. To mitigate yield losses, effective management, and protection plans need to be developed and implemented as soon as possible. This article summarises the coordinated approach being taken in the US to address the possible appearance of Ug99 and its variants on wheat and barley.
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Keywords: BARLEY; FUNGICIDES; PUCCINIA GRAMINIS F. SP. TRITICI; SMALL GRAINS; UG99; VARIETAL RESISTANCE; WHEAT; WHEAT STEM RUST

Document Type: Research Article

Publication date: 2009-08-01

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