Apple Rootstock Info: P.18

Characteristic Detail Description
Rootstock P.18

Resulted from a cross of M.4 x Common Antonovka and released by the Research Institute of Poland  in Skierniewice, Poland. This is a nondwarfing rootstock with vigor similar to seedling. It has not been tested widely in North America, but based on a trial in Illinois P.18 was less precocious and had lower yield efficiency than MM.111. Inoculation tests in California indicate it is moderately resistant to phytophthora. It is susceptible to wooly apple aphid,