Common Rust

Figure 1 Reddish brown, circular pustules or uredinia up to 6 mm in diameter (¼ inch) form on leaves or stems, rarely pods. uredinia may be surrounded by a yellow halo, and commonly occur on both surfaces of leaves.

Figure 2 Spores feel like fine powder, and leavedusty streaks when uredinia are rubbed.

Figure 3 Dark brown to black telia up to 6 mm in diameter (¼ inch) may form on leaves, stems or pods later in the season. This spore stage will overwinter and does not re-infect current season beans.