Mark

Origin Michigan State University, USA.
M.9 open pollinated (1970s), patented in Australia.
Description Leaf: medium size, slightly upfolded and curling back, brownish faintly tomentose petiole.
Shape: oval with attenuate tip and truncate base.
Margin: sawtooth serrations.
Stipules: thin, narrow, elliptical, inconspicuous.
Shoot: bark grey brown, slightly tomentose, some overgrowth just at ground level.
Vigour Dwarfing, slightly larger than M.9; between M.9 and M.26.
Propagation Does well in stool beds like MM.106 or in meristem culture. Does fairly well from cuttings like M.7.
Resistance Collar rot resistant. Susceptible to woolly aphid.
Uses Productive and precocious, does not sucker. Not fully tested in Australia. Recent overseas research indicates that the stock has anchorage and compatibility problems, and an unidentified ‘burr knot’ like symptom at ground level of the root system.
AppearanceMark branch  Mark leaf 

This information forms part of Agfact H4.1.10 Apple rootstock identification.