Cedar-apple Rust

Gymnosporangium juniperi-virginianae

''Gymnosporangium juniperi-virginianae'' is a plant pathogen that causes cedar-apple rust. In virtually any location where apples or crabapples and Eastern red-cedar coexist, cedar apple rust can be a destructive or disfiguring disease on both the apples and cedars. Quince and hawthorn are the most common host and many species of juniper can substitute for the Eastern red cedars.
Taxonomy
KingdomFungi
DivisionBasidiomycota
ClassPucciniomycetes
OrderUredinales
FamilyPucciniaceae
GenusGymnosporangium
SpeciesG. juniperi-virginianae