Manual of Rootstocks

Bud 9Dwarf M9 class rootstock

Used for: Apple
Developed by: Michurinsk State Agrarian University
Country of origin: Russia
Parentage: M8 x Krasnij Standart

Like the other stocks in this series, the leaves are a distinctive red.

It has similar vigor to the weaker ‘M.9' clones like ‘M.9 Fleuren 56'; 25 to 35% smaller than ‘M.9 EMLA' depending on the cultivar.

In a 10-year trial at University Park, Pennsylvania; ‘York Imperial', ‘Rome Beauty', and ‘Empire' on ‘B.9' were approximately 25% smaller than the same cultivar on ‘M.9 EMLA'; while ‘Jonagold', ‘Golden Delicious', and ‘McIntosh' were approximately 35% smaller.

Brittle roots. Excellent productivity.

‘B.9' induces early fruiting and is compatible with most cultivars, needs well drained soils, grows a dense, heavy flowered tree, has high yield efficiency.

Good for container growing.

Keep a grass and weed free growing area.

‘B.9' promotes open scion growth and produces crops in two to three years. ‘B.9' works in high-density planting and as an interstem.

Use ‘B.9' with vigorous scion varieties such as, ‘McIntosh', ‘Mutsu', ‘Jonagold', and ‘Fuji.

Susceptible to drought and voles.

In some reports, there is concern that ‘B.9' does not do well in coarse or poor soils, rather it needs fertile soils to do best.

The ‘B.9' clone grown in North America is reported to be more vigorous with fewer suckers than the ‘B.9' clone grown in Europe.

Bud 9 rootstock characteristics

  • Species compatibilityApple
  • Vigour % of standard25% - 40%
  • Rootstock size classDwarf
  • PrecocityPrecocious
  • Support requiredPermanent support
  • DeveloperMichurinsk State Agrarian University
  • Country of originRussia
  • Woolly aphidSome susceptibility
  • Fire blightSome susceptibility
  • Powdery mildewSome resistance
  • ScabSome resistance
  • Burr knotsFew
  • Collar rotSome resistance
  • Root suckersSome

See also

  • G.41

    G.41 is a good rootstock for less vigorous apple varieties, but does need support. In trials in British Columbia, Canada, it had fewer root suckers than M.9.

Find our more about this rootstock in the 'Manual of Worldwide Temperate Zone Fruit and Nut Tree Rootstocks'.

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