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Selecting the right rootstock is a very important part of your overall planning. Your soil type, orchard site, tree spacing and water source and water quality, will help determine what rootstock is best suited to your planting.

 

Nemaguard – the most widely used rootstock for almonds, peaches and nectarines, well adapted to sandy loam soils, root- knot nematode resistant, vigorous strong tree. Better adapted to tighter spacing.

Nemared – slightly more vigorous than Nemaguard. This rootstock is similar to Nemaguard in all aspects, possibly more resistant to root-knot nematode than Nemaguard. More susceptible to ring nematode than Nemaguard.

Lovell – well adapted to shallow, slightly heavier soils, well anchored, slightly more resistant to wet condi- Selecting the Right Rootstock for Your Planting tions than Nemaguard but prefers well drained soils. Slightly more resistant to bacterial canker than Nemaguard. Susceptible to root knot nematode.

Marianna 26-24 – slightly dwarfing, moderately resistant to phytophthora crown and root rot and oak root fungus. Tolerates wet soils, root-knot nematode resistant, suckers profusely. Very susceptible to bacterial canker, incompatible with peaches, nectarines and some almond varieties. Almond subject to brown line and union mildetch.

Marianna M-40 – better rooting depth and less suckering than Marianna26-24, slightly dwarfing, moderately resistant to phytopthora, crown and root rot and oak root fungus, tolerates wet soils, root-knot nematode (Continued on page 8) 8 The Nursery Company resistant. Very susceptible to bacterial canker, incompatible with peaches, nectarines and some almond varieties. Almond subject to brown line and union mild-etch.

 

• Titan (peach-almond hybrid) – this seed born rootstock is a cross between Nemaguard and Titan almond, this has been the most popular rootstock in the hybrid category, extremely vigorous, some root-knot nematode resistance, considered well anchored, tolerant of calcareous soil conditions, slower to come into bearing, trees may be excessively vigorous in good soil.

• Red Titan™
(peach-almond hybrid) – this seed born rootstock is a cross between Nemared and Titan almond, its performance is similar to that of Titan with possible more resistance to root-knot nematode. Extremely vigorous, considered well anchored, tolerant of calcareous soil conditions, slower to come into bearing, trees may be excessively vigorous in good soil.

• Red Titan II™ (RH2) (peach-almond hybrid) this rootstock selection is grown from tissue culture and is a selection from a cross between Nemared and Titan almond. Growing this selection from tissue culture allows 100% uniformity on its performance unlike seed born selections. Extremely vigorous and well anchored may have more root-knot nematode resistance than the standard hybrids, more tolerant of saline soil than peach and more tolerant of calcareous soils than peach; slower to come into bearing, trees may be excessively vigorous on good soil.

• Hansen 536 (peach-almond hybrid) – this was originally a cutting grown rootstock. Very difficult to propagate from cuttings, this is now available through tissue culture. Very good anchorage prefers deep well drained soils, highly susceptible to crown rot, crown gall and ring nematode witch causes bacterial canker. Vigorous, drought tolerant, root-knot nematode resistant and tolerant of calcareous soil conditions, excessively vigorous on good soils.

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