PP #11/047,370. This rootstock is a cross of Ottawa 3x Robusta 5 introduced by Cornell University/Geneva Apple Rootstock Breeding Program. Trees produced are slightly larger than trees budded on M26. Resistant to fire blight & Phytophthora but not wo0lly apple aphid. Temporary staking is recommended but permanent staking is better. Semi-Dwarf, 11-13 ft.