APPLE ROOTSTOCKS
P.18

SIZE CLASS 9-10

P.18 (Poland 18)



Pedigree

M.4 X Common Antonovka

 

Precocity

Poor

Productivity

Low to moderate, similar to seedling

Scion Fruit Size

 
Scion Fruit Quality  

Anchorage

Support generally not required

Fire blight

Reportedly somewhat resistant, further testing required

Crown & Root Rots

Resistant, further testing required

Woolly Apple Aphid

Susceptible

Powdery Mildew

Somewhat resistant

Hardiness (Midwinter)

Moderate to excellent hardiness, further testing required
Bud Break Early
Leaf Fall  

Suckering

Light

Burrknots

Light

Stoolbed Performance

Excellent

Virus hypersensitivities

None noted, further testing required

Experience

P.18 has been planted in North America in a limited basis.

Sources

TRECO

Strains

 

Observations, suspicions, history

P.18 is a vigorous rootstock noted for its horizontal rooting habit that may be useful in poorly drained sites. The primary advantage P.18 provides over seedling rootstocks is uniformity. P.18 might also be useful for very specific applications with dwarfing interstems. P.18 may prove commercially useful on a limited basis for use with spur type scions on poor sites.

 

 

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Last modified September 21, 1999.