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

Fig. 3. Scanning Electron Microscopy (SEM) of the adaxial side of the leaf of P. vulgaris showing numerous sori throughout the leaf surface (75×).



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