Table of apple rootstock resistance to Phytophthora crown, collar and root rots, Phytophthora spp.
(Source of information and credits provided at the bottom of the page.)
Table of apple rootstock resistance to Phytophthora crown, collar and
root rots, Phytophthora spp.
(Source of information and credits provided at the
bottom of the page.)
| Apple cultivar | Phytophthora resistance ratingz |
| M.104 | HS |
| M.106 | HS |
| M.111 | S-MR |
| M.2 | MR |
| M.26 | S-HS |
| M.4 | MR |
| M.7 | S |
| M.7a | S |
| M.9 | MR |
| Seedling | MR |
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:
Wilcox, W. 1990. Phytophthora crown, collar, and root rots. In: A. L. Jones and H. S. Aldwinckle, Eds., Compendium of Apple and Pear Diseases. APS Press, St. Paul, MN.