First Report of Sugar Beet Seedling Rust Caused by <i>Puccinia subnitens</i> in Nebraska

Fig. 2. Thin section of a pycnial lesion on a sugar beet leaf with flask-shaped pycnia embedded in the epidermal surface. Close-up of one pycnium exhibiting receptive hyphae and spermatia (inset).



Image from Plant Health Progress article:
First Report of Sugar Beet Seedling Rust Caused by Puccinia subnitens in Nebraska