MM 106 resulted from a joint program of rootstock breeding carried out
by East Malling Research Station and the John Innes Institute. It was
derived from a cross between Northern Spy and Malling 1 (a vigorous
stock selected from English Broadleaf). A virus-indexed EMLA clone
was introduced by East Malling in 1969 - 70.
Influence on Scion Varieties
EMLA 106 & MM 106 produce trees that are about 70% the size of those on
introduction, it has rapidly become the most widely used rootstock in
high latitude countries because of its heavy cropping potential,
moderate vigor, freedom from suckering and resistance to woolly aphids (Eriosoma
langierum). EMLA 106 is more sensitive to soil moisture than most
rootstocks. On dry sandy soils vigor is reduced to less than that of
EMLA 7, but on fertile soils, it produces trees similar in size to those
on EMLA 2 and EMLA 111.
EMLA 106 are resistant to potassium deficiency, but they occasionally
suffer from magnesium deficiency.
EMLA 106 is susceptible to mildew. It is not resistant to collar rot (Phytophthora
cactorum). This problem may not be as serious in the future,
however, due to the new extensive fungicide research on Phytophthora
EMLA 106 stoolbeds produce excellent first-grade rootstocks. Lined-out
in the nursery, EMLA 106 produces large calipered, well-branched maiden
EMLA 106 is a semi-vigorous rootstock that can be recommended for use
over a wide range of soils and climatic conditions for planting
densities of approximately 200-250 trees per acre.
on EMLA 106 are well anchored and do not require staking.