Apple Rootstock Susceptibility to E. amylovora

Table of apple rootstock resistance to the fire blight bacterium, Erwinia amylovora.
(Source of information and credits provided at the bottom of the page.)

Apple cultivar	Fire blight resistance rating^z	Apple cultivar	Fire blight resistance rating^z
Alnarp 2	HS	M.26	HS
Bemali	S	M.27	HS
Bud. 9	HS	MM.106	S
Bud. 118	S	MM.111	S
Bud. 140	S	Mark	HS
C.6 (interstem)	HS	Novole	MR
Geneva 11	MR	Ottawa 3	HS
Geneva 30	MR	P.2	HS
Geneva 65	MR	P.16	HS
M.7	MR	P.22	HS
M.9	HS	Robusta	MR
M.9 (interstem)	HS

^zMR = Moderately resistant.
S = susceptible.
HS = highly susceptible.

Data compiled by K. S. Yoder and A. R. Biggs from personal observations and the following sources:

van der Zwet, T., and S. V. Beer. 1995. Fire blight - Its nature, prevention, and control. USDA Agriculture Information Bulletin Number 631.