HORTICULTURE
Fireblight rating for apples in 2000
Severity of fire blight on apple trees on M.7a or M.7 EMLA rootstocks at the Southwest Michigan Research and Extension Center following a severe epidemic in 2000. Scores were based on the scale: 1 = low to 6 = severe. Data are mean rating scores for a minimum of three trees.
| Variety | Severity |
| Lucky Rose | 1.0 |
| Valstar | 1.3 |
| Novamac | 1.3 |
| Williams Pride | 1.5 |
| Mollies Delicious | 1.5 |
| Runkel | 1.5 |
| Nova Spy | 1.5 |
| Red Delicious strains | 1.5 |
| Zestar! | 1.7 |
| Empire strains | 2.0 |
| Honeycrisp | 2.0 |
| Royal Court | 2.0 |
| Enterprise | 2.0 |
| Pinova | 2.0 |
| Acey Mac | 2.5 |
| Corodel | 2.5 |
| Winsap/Staymen strains | 2.6 |
| Braeburn strains | 2.7 |
| Jonamac | 2.7 |
| Pristine | 2.8 |
| Cameo | 2.8 |
| Jonagold strains | 2.9 |
| Macoun | 3.0 |
| Liberty | 3.0 |
| Macintosh strains | 3.3 |
| Golden Delicious strains | 3.4 |
| Spigold | 3.7 |
| Arlet | 4.0 |
| Melrouge | 4.0 |
| Rome strains | 4.2 |
| Gala strains | 4.4 |
| Suncrisp | 4.5 |
| Jonathan strains | 5.0 |
| Paulared | 5.0 |
| Fortune | 5.8 |
| York strains | 6.0 |
| Pink Lady | 6.0 |
| Gingergold | 6.0 |
Data adapted from W. W. Shane, 2000, Annual Report, SW Michigan Research & Extension Center, Michigan State University, Benton Harbor, MI. In 2003 this table replaced an older table in the Michigan Fruit Management Guide, E-154. I have also posted the older table that was derived from a fire blight epidemic in Southwest Michigan in 1992.