Cedar-apple rust is a fungus disease of apple and cedar and spends parts of its life cycle on each host. It is caused by Gymnosporangium juniperi-virginianae. The fungus can infect leaves and fruit of most cultivars in the eastern region. This table lists the susceptibility of various apple cultivars to cedar apple rust.
| Apple cultivar | Cedar-apple rust susceptibility rating (z) | Apple cultivar | Cedar-apple rust susceptibility rating (z) |
|---|---|---|---|
| Ambrosia | HS | Mollies Delicious | VR |
| Arkansas Black | R | Monroe | S |
| Arlet | HS | Mutsu | S |
| Baldwin | VR | Niagra | R |
| Barry | R | Northern Spy | S |
| Beacon | S | Northwestern Greening | S |
| Ben Davis | S | Orin | S |
| Braeburn | HS | Paulared | R |
| Britemac | R | Prima | HS |
| Burgundy | S | Pink Lady | S |
| Cameo | HS | Pinova | HS |
| Carroll | R | Princess | HS |
| Chinook | HS | Priscilla | R |
| Crimson Crisp | HS | Puritan | R |
| Creston | HS | Quinte | S |
| Dayton | R | Raritan | S |
| Delblush | VR | Redfree | VR |
| Delicious | VR | Rhode Island Greening | S |
| Early McIntosh | R | Rome Beauty | HS |
| Empire | R | Runkel | VR |
| Enterprise | VR | Sansa | VR |
| Fortune | R | Scarlet O’Hara | HS |
| Fuji | HS | Scotia | R |
| Gala | HS | Senshu | S |
| Gala Supreme | VR | September Wonder | S |
| Ginger Gold | HS | Shizuka | HS |
| Gloster | S | Spartan | R |
| Golden Delicious | HS | Spigold | HS |
| Golden Supreme | R | Spijon | S |
| GoldRush | HS | Stark Bounty | S |
| Granny Smith | R | Stark Splendor | S |
| Gravenstein Holly | VR | Starkspur earliblaze | R |
| Grimes Golden | R | Stayman | S |
| Hampshire | VR | Summerred | HS |
| Honeycrisp | S | Suncrisp | R |
| Idared | S | Sundance | VR |
| Jamba | S | Sunrise | S |
| Jerseymac | VR | Twenty Ounce | HS |
| Jonafree | S | Viking | R |
| Jonagold | S | Wayne | S |
| Jonamac | R | Wealthy | HS |
| Jonathan | HS | Williams Pride | S |
| Julyred | S | Winesap | R |
| Liberty | VR | Winter Banana | HS |
| Lodi | HS | Wellington | R |
| Macoun | R | Yakata | S |
| Maiden Blush | R | Yellow Transparent | R |
| McIntosh | VR | York Imperial | HS |
| Milton | VR | Zestar! | VR |
| (z)
VR = very resistant. No control needed. (Very few cultivars in this category for any disease.) R = resistant. Control needed only under high disease pressure. S = susceptible. Control usually needed where disease is prevalent. HS = highly susceptible. Control always needed where disease is prevalent. These cultivars should receive first priority when control is required. |
|||
See Cedar-Apple Rust and Table of Juniper, Hawthorn, and Crab Apple Resistant to Rust Diseases for more information.