779 Paulsen

Origin: Italy (Paulsen – 1894).

VEGETATIVE FEATURES

Leaf: medium-sized, kidney-shaped, whole, with a wide and open V-shaped petiolar sinus, it has a glossy upper side and a hairless dark-green flap, bullous, light-green main ribs, bristly lower side, green-colored.

Woody shoot: long, branched, conspicuous development of secondary shoots, hairless, gray-brown, partially pruinose.

CULTURAL APTITUDES

Ability to promote fruit setting:

good

Root system regeneration:

acceptable

Adaptability to soil type:

compact: excellent
wet: poor
dry: good
stony: good
acidic: poor
saline: acceptable

Branching pattern of the roots:

taproot

Susceptibility to deficiencies or excesses:

deficiency of K: low sensitivity
deficiency of Fe: sensitive
deficiency of Mg: sensitive
deficiency of Zn: low sensitivity

Resistance to root phylloxera:

excellent

Resistance to leaf phylloxera:

poor

Susceptibility to fungal and plant diseases:

downy mildew: low
powdery mildew: sensitive
anthracnose: sensitive
eutypa disease: it induces sensitivity
rachis desiccation: it induces sensitivity

OTHER INFORMATION

Behavior in the nursery: it shows incompatibility issues with some varieties; it benefits from mulching, which is aimed at delaying the rooting process; it induces abnormal enlargements at the callusing point; it needs a close vegetative management and not-too-fertile soils so to ensure a constant production.

Behavior in the propagation block: it is normally grown sprawling on the ground in hot and dry environments; when grown on trellis, it tends to suffer from etiolation: in such case the removal of dried leaves is very useful.

Behavior in the open field: it has a good productivity; it induces the growth of excessive callousing tissue at the grafting point and the detachment of the scion; it is suitable to replanting but not to be grown on dense rows; good both for lean and heavy soils.