释义 |
apple rust noun 1. : any of several diseases caused by fungi of the genus Gymnosporangium; especially : a destructive fungous disease especially of the apple but also attacking pears and quinces that is caused by a rust (G. juniperi-virginianae) having its pycnial and aecial stages on the leaves and fruit of the apple and the telial stage on species of Juniperus, especially a common red cedar (J. virginiana) 2. : the fungus causing apple rust — called also cedar apple rust, cedar rust; compare cedar apple |