First Report of Bean Rust Caused by <i>Uromyces appendiculatus</i> Race 19-63 in Puerto Rico

Fig. 2. Uredinial pustule of U. appendiculatus race 19-63 on the adaxial side of the cultivar 'Verano' (40×). Bar = 500 µm.



Image from Plant Health Progress article:
First Report of Bean Rust Caused by Uromyces appendiculatus Race 19-63 in Puerto Rico