Serviceberry, Amelanchier spp., is susceptible to Gymnosporangium spp. rust. This gallery has images of leaf, stem, and fruit infections.
More information on this rust, including biology and management, can be found at the Pacific Northwest Plant Disease Management website.
Page last modified 4/9/15
Gymnosporangium spp. rust infection on serviceberry leaf
Gymonosporangium infection on leaves
Gymonosporangium infection on stem
Gymonosporangium infection on fruit
Gymonosporangium infection on fruit closeup