Berlandieri x Riparia Group

161.49 C

Origin: France (Couderc – 1888).

VEGETATIVE FEATURES

Leaf: medium, wedge-shaped, slightly bullous and corrugated flap in between dark green ribs, three lobed; it has a U-shaped petiolar sinus partially delimited by ribs, pink-colored ribs at the petiole insertion spot; the lower side is velvety, with green-colored ribs, pinkish at the base.

Woody shoot: long, branched, striped, particularly pubescent on knots, brown-purple, with more marked streaks along the internode and at the nodes.

CULTURAL APTITUDES

Ability to promote fruit setting:

slow

Root system regeneration:

fair

Adaptability to soil type:

compact: medium
wet: medium
dry: poor
stony: medium
acidic: poor
saline: good

Branching pattern of the roots:

expanded and superficial

Tendency to emission of suckers:

acceptable

Susceptibility to deficiencies or excesses:

deficiency of K: sensitive
deficiency of Fe: low sensitivity
deficiency of Mg: low sensitivity
deficiency of B: sensitive
deficiency of P: senstive

Resistance to root phylloxera:

high

Resistance to leaf phylloxera:

good

Susceptibility to fungal and plant diseases:

downy mildew: low
powdery mildew: low
anthracnose: low
eutypa disease: medium sensitivity
rachis desiccation: it induces high sensitivity
apoplexy: high susceptibility

OTHER INFORMATION

Behavior in the nursery: the rooting is good in combination with most grape varieties but not for table ones; the development of the scion is initially quite slow; it benefits from hormone treatments and mulching, aimed at stimulating the rooting process.

Behavior in the propagation block: it is advisable to grow it on trellis, so to facilitate the lignification and hold back anthracnose attacks.

Behavior in the open field: it enhances the production of quality grapes, especially in combination with early ripening table varieties; it doesn't lend itself to replanting and it is not so suitable to dense plantation on the row; it induces differences in diametrical growth at the grafting point; it can show tylosis problems when grown on dry soils.