Table 2. Fire blight ratings for flowering crabapples based on natural infection.

Malus taxa	Natural Infection 1994	Natural Infection 1995	Natural Infection 1999
sieboldii ‘Calocarpa’	0.0	0.0	0.0
‘David’	0.0	0.0	0.0
‘Adirondack’	0.0	0.0	0.0
‘Sentinel’	0.3	0.7	0.0
‘Adams’	0.0	0.0	0.0
‘Pink Princess’	0.0	0.0	0.0
‘Sutyzam’ (Sugar Tyme^TM )	0.2	0.0	0.0
‘White Cloud’	0.0	0.0	0.0
‘Centurion’	0.0	0.0	1.0
baccata ‘Jackii’	0.0	0.0	0.0
‘Radiant’	0.0	0.0	0.7
‘Molten Lava’	0.0	0.0	0.0
‘Pink Satin’	0.0	0.0	0.0
‘Camzam’ (Camelot^TM )	NA	0.0	0.0
‘Ormiston Roy’	0.0	0.7	1.7
‘Prairifire’	0.0	0.0	0.0
‘Indian Summer’	0.0	0.0	0.0
floribunda	0.3	1.0	1.0
‘Robinson’	0.0	0.0	0.0
‘Narragansett’	0.0	0.0	0.0
‘Dolgo’	0.0	0.0	0.3
sargentii	0.0	0.0	0.0
‘Liset’	0.0	0.0	0.7
‘Jewelberry’	0.0	0.0	0.0
‘Purple Prince’	0.0	0.0	0.0
‘Strawberry Parfait’	0.3	0.0	0.0
‘Callaway’	0.0	0.0	0.0
‘Candy Mint’	0.0	0.0	0.0
‘Glen Mills’	0.0	0.0	0.3
‘Silver Drift’	0.0	0.0	0.7
‘Snow Drift’	0.0	0.3	0.3
‘Canary’	0.0	0.0	0.0
‘Hargozam’ (Harvest Gold^TM )	0.3	0.7	1.3
‘Louisa’	0.0	0.0	0.2
‘Prairie Maid’	0.0	0.0	0.0
‘Red Splendor’	0.0	0.0	0.0
‘Doubloons’	0.3	0.7	0.7
‘Baskatong’	0.0	0.0	0.0
‘Professor Sprenger’	0.0	0.3	0.3
‘Branzam’ (Brandywine^TM )	0.0	0.0	2.0
‘Mary Potter’	0.0	1.0	1.3
‘White Angel’	0.0	0.0	0.0
‘Mazam’ (Madonna^TM )	0.0	1.7	0.3
hupehensis	0.0	0.8	2.7
‘Donald Wyman’	0.0	0.3	0.5
‘Silver Moon’	1.3	2.0	2.7
‘Schmidtcutleaf’ (Golden Raindrops^TM)	1.0	2.0	2.3
tschonoskii	0.0	0.0	2.5
‘Sinai Fire’	1.0	0.7	2.0
LSD 0.05	0.5	0.4	0.8

Natural infection: 0=no evidence of fire blight, 1=few (1-3) branch tips infected, 2=numerous (>3)

branch tips showing symptoms and few (1-3) major branches infected, 3=several (2-3) major

branches infected and considerable dieback, 4=major (>30%) portion of the tree killed. NA = data

not available.