Berlandieri x Riparia Group
420A
Origin: France (Millardet e de Grasset – 1887).
VEGETATIVE FEATURES
Leaf: medium-to-large, wedge-shaped, whole or with a hint of a three-lobed shape, hairless upper side, dark-green flap, bullous, with a V-U-shaped open petiolar sinus; the lower side is arachnoid, green, with light-green main ribs.
Woody shoot: long, branched, with prominent development of secondary shoots, elastic, hairless, of a bright brown-purple color.
CULTURAL APTITUDES
Ability to promote fruit setting:
good
Root system regeneration:
slow
Adaptability to soil type:
- compact: good
- wet: very poor
- dry: good
- stony: good
- acidic: poor
- saline: poor
Branching pattern of the roots:
taproot
Susceptibility to deficiencies or excesses:
- deficiency of K: sensitive
- deficiency of Fe: low sensitivity
- deficiency of Mg: sensitive
- deficiency of Zn: sensitive
- deficiency of P: low sensitivity
Resistance to root phylloxera:
high
Resistance to leaf phylloxera:
good
Susceptibility to fungal and plant diseases:
downy mildew: low
powdery mildew: sensitive
anthracnose: sensitive
eutypa disease: it induces sensitivity
rachis desiccation: it induces moderate sensitivity
OTHER INFORMATION