Black stem rust (Ug99) Puccinia graminis f.sp. tritici (Ug99) is a serious disease of wheat and barley. While wheat in the United States is resistant to most strains of black stem rust, it is not ...
Rhind, Waterston and Deighton reported epidemics of Puccinia polysora Underw. in West Africa in 1949 and the following years 1. Fears were expressed that this disease might eventually reach East ...
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