Berlandieri x Rupestris Group

1103 Paulsen

Origine: Italy (Paulsen – 1895).

VEGETATIVE FEATURES

Leaf: medium-small, kidney-shaped, with a wide open brace-shaped petiolar sinus and ribs circling a limited portion of the edge of the leaf, which is whole, with a glossy upper side, a dark green flap, tomentose with convoluted edges; the ribs are purple-colored, the lower side is hairless and green.

Woody shoot: very long, uniform, branched, with a conspicuous development of secondary branches, hairless, gray-brown, slightly pruinose.

CULTURAL APTITUDES

Ability to promote fruit setting:

poor

Root system regeneration:

excellent

Adaptability to soil type:

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

Branching pattern of the roots:

expanded, deep.

Tendency to emission of suckers:

high

Susceptibility to deficiencies or excesses:

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

Resistance to root phylloxera:

high

Resistance to leaf phylloxera:

acceptable

Susceptibility to fungal and plant diseases:

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

OTHER INFORMATION

Behavior in the nursery: the rooting is good in combination with most grape varieties; it induces a good development in the scion; it benefits from mulching.

Behavior in the propagation block: when grown on trellis it doesn't show any particular problem; on the other hand, when grown sprawling on the ground, the soil should be devoid of cobble stones; it behaves similarly to Kober 5 BB.

Behavior in the open field: it enhances a quick vegetative resumption; it induces sensitivity to spring colds in northern areas; it impresses vigor, it is not suitable to plantation thickening on the row; it delays the vegetative cycle while keeping a good must acidity; it accentuates the coulure phenomenon in susceptible varieties; it needs access to water during the vegetative cycle; it is not suitable to particularly heavy soils; the management of suckers is crucial.