There are around 8,000 named species of rust diseases, many of them host-specific. Scientists speculate there are many more types of rust diseases in the tropical
The signature symptom of rust is the orange, yellow, brown, or red spore masses on the outside of the plant. This color gives the rust fungus its name.
Stage 0
The basidiospores, made when the overwintering teliospores germinate, infect the barberry plant. They create spermogonia. Each spermogonium has receptive hyphae