Disease resistance in apples is relative, not absolute!
DISEASE RESISTANCE AMONG APPLE VARIETIES IS RELATIVE, NOT ABSOLUTE! The concept of disease resistance among apple varieties seems to be often misunderstood. Rarely is resistance so strong that it is absolute or immune. There are some bona fide scab-immune apple varieties (e.g., Williams Pride, Liberty, Pristine, and Enterprise), and there are some cedar apple rust-resistant …