URI Flowering Crabapple Tree Disease Evaluations
Resistance to Disease
| Variety | Flower/Fruit | Shape | HtxWd | Comments | Apple Scab | Fire Blight | Cedar Apple Rust |
Powdery Mildew |
| Adams | Pink/Purple | Round | 20x20 | 3,4 | Good | Good | Excel | Good |
| baccata‘Jackii’ | White/Red | Round | 30x30 | Excel | *Poor | Excel | Good | |
| Baskatong | Red/Dk Red | Round | 30x30 | 3 | Good | Excel | Excel | Excel |
| Beverly | White/Red | Upr Spr | 25x30 | 1 | Excel | *Poor | Excel | Excel |
| Bob White | White/Yel-Red | Horiz | 20x25 | 2,4,5 | Excel | *Fair | Excel | Good |
| Brandywine | Pink/Yellow | Upr Spr | 20x20 | 2 | Fair | Excel | Fair | Excel |
| CandiedApple | Pink/Red | Weeping | 15x15 | 3,4 | Fair | Excel | Excel | Excel |
| Centurion | < Red/Red |
 Upr Spr |
20x15 | 3 | Good | Excel | Excel | Excel |
| ChristmasHolly | White/Red | Spr | 10x12 | 4 | Good | Good | Excel | Excel |
| David | White/Red | Round | 15x15 | 1 | Good | Good | Excel | Excel |
| Dolgo | White/Red | Upr Spr | 30x40 | 1,2,6 | Good | Good | Excel | Excel |
| Donald Wyman | White/Red | Round | 15x15 | 4 | Good | *Poor | Excel | Good |
| floribunda |  Pink to W/Red |
 Horiz |
20x25 | 2,5 | Good | *Fair | Excel | Good |
| Harvest Gold |  White/Gold |
 Upr |
30x15 | 3,4 | Good | Excel | Excel | Excel |
| Henningi | White/Orange | Upr | 25 | Good | Excel | Good | Excel | |
| Henry Kohankie | Pink to W/Red | Round | 20x20 | 4 | Good | Excel | Good | Excel |
| Hopa | Pink/Purple | Upr Spr | 25x30 | 2 | Poor | Excel | Excel | Excel |
| Indian Magic | Pink/Red-Or | Round | 15x15 | 1,2,3,4 | Fair | Excel | Good | Excel |
| Indian Summer | Red/Red | Upr Spr | 20x20 | Good | Good | Excel | Excel | |
| Jewelberry | White/Red | Shrub | 12x15 | 4,5 | Good | Good | Excel | Excel |
| Liset |  Red/Maroon |
 Horiz |
15x20 | Good | Good | Excel | Excel | |
| Mary Potter |  White/Red |
 Shrub |
15x30 | 1,2,3,4,5 | Good | Good | Excel | Good |
| Molten Lava |  White/Red |
 Horiz |
15x15 | 2,3,4,5 | Good | Good | Excel | Excel |
| Ormiston Roy | White/Red-Or | Upr Spr | 20x25 | 4 | Good | Good | Good | Excel |
| Pink Spires | Pink/Maroon | Upright | 25 | 2 | Good | Good | Excel | Excel |
| Prairifire |  Red/Red |
 Upr Spr |
20x20 | Good | Excel | Excel | Excel | |
| Professor Sprenger | White/Orange | Round | 25x25 | 1,4 | Excel | Excel | Excel | Excel |
| Profusion |  Red/Dk Red |
 Round |
15x15 | Fair | Good | Excel | Good | |
| Radiant |  Red/Red |
 Upr Spr |
25x20 | 2 | Poor | Excel | Good | *Fair |
| Ralph Shay | White/Red | Upr Spr | — | 3 | Good | Excel | Excel | Excel |
| Red Barron | Red/Dk Red | Narrow | 18x10 | 3 | Fair | Good | Good | Excel |
| Red Jade |  White/Red |
 Weeping |
15x15 | Fair | *Fair | Excel | *Fair | |
| Red Jewel | White/Red | Horiz | 15x12 | 4 | Fair | *Poor | Excel | Good |
| Red Splendor | Pink/Red | Upr Spr | 25x25 | Fair | *Fair | Good | *Fair | |
| Robinson |  Red/Red |
 Upr Spr |
25x25 | 3 | Good | Excel | Excel | Excel |
| Royalty | Purple/Purple | Upr Spr | 15x20 | Good | Excel | Excel | Excel | |
| sargentii | White/Red | Shrub | 8x15 | 1,2,4,5 | Excel | Good | Excel | Excel |
| Selkirk | Red/Red | Vase | 25x25 | Fair | Good | Excel | *Fair | |
| Sentinel | White/Red | Upr Spr | 15x10 | 4 | Good | Good | Excel | Excel |
| Silver Moon |  White/Red |
 Upr Spr |
25x25 | 4 | Good | *Poor | Excel | Good |
| Snowdrift |  White/Orange |
 Round |
20x20 | 4,5 | Good | *Fair | Excel | Excel |
| Strawberry Parfait | Pink/Red | Vase | 20x25 | 1 | Good | Excel | Excel | Excel |
| Sugar Tyme | White/Red | Round | 20x20 | 1,2,3,4 | Good | *Fair | Excel | Excel |
| tschonoskii | White/Yellow | Pyramid | 28x14 | 3 | Good | *Poor | Excel | Excel |
| Velvet Pillar | Red/Red | Nar Upr | 20x14 | Fair | *Fair | Excel | Good | |
| White Angel | White/Gr+Red | Upr Spr | 20x20 | 4 | Good | *Fair | Fair | Excel |
| White Cascade |  White/Coral |
 Weeping |
15x15 | Good | Excel | Excel | Excel | |
| Winter Gold |  White/Yellow |
 Round |
25x25 | 2,4 | Fair | *Fair | Excel | Good |
| yunnanensis ‘Veitchii’ | W/Brown | Narrow | 20x10 | 3 | Good | *Fair | Excel | Good |
| zumi ‘Calocarpa’ |  White/Red |
 Horiz |
25x30 | 2,5 | Good | *Fair | Excel | Good |
Key to Comments
1. Flowers lightly in alternate years
2. Fragrant flowers
3. Colorful fall foliage
4. Fruit remains on tree
5. Birds favor fruit as food
6. Messy fruit drop in midsummer
Key to Disease Resistance
Excel: No problem with disease
Good: Some leaves affected
Fair: Most leaves affected yet little or no defoliation,
thus not a significant problem
Poor: Consistently defoliates in summer
* Apple Scab is the disease of consequence in the Northeast. Although we’ve not seen the potentially lethal fire blight, or the less serious Powdery Mildew, future conditions in the Northeast may favor these diseases.
Please note: this compilation is composed of local data collected from 1993 to 1997, adjusted with national disease ratings from NCEP/NCIP plantations throughout the country. Research by Marsha Browning & Larry Englander, 1997