Table of Apple Rootstock Susceptibility to the Fire Blight Bacterium
Erwinia amylovora  

 

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

Apple rootstock cultivar Fire blight
resistance ratingz		 Apple rootstock cultivar Fire blight
resistance ratingz
Alnarp 2 HS M.9, M.9-T337 and other M.9 strains HS
Antonovka 313 S M.9 (interstem) HS
Bemali S M.26, EMLA 26 HS
Bud. 9 HS/MR* M.27, EMLA 27 HS
Bud. 118 S MM.106 S
Bud. 140 S MM.111 R
Bud. 490 R Mark HS
C.6 (interstem) HS Novole MR
C-G 210 R Ottawa 3 HS
Geneva 11 MR P.2 HS
Geneva 16 R P.18 MR
Geneva 30 MR P.16 HS
Geneva 65 MR P.22 HS
M.4 R Robusta MR
M.7a, EMLA 7 MR Seedling R
EMLA 9 HS    

z R = Tolerant or resistant.
MR = Moderately resistant.
S = susceptible.
HS = highly susceptible.
* B.9 shows moderate resistance in the field, but is highly susceptible in laboratory assays.

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.

Fazio G., Aldwinckle H. S., McQuinn, R. P. and Robinson, T. L. 2006. Differential Susceptibility to Fire Blight in Commercial and Experimental Apple Rootstock Cultivars. Proc. 10th Intl. Workshop on Fire Blight. Ed. C. Bazzi and U. Mazzucchi. Acta Horticulturae 704:527-530.

Web resource: http://www.caf.wvu.edu/kearneysville/tables/fbrootsus.html