Riparia x Rupestris Group
Origin: France (Millardet e De Grasset – 1882).
Leaf: medium-sized, wedge-shaped, slightly three-lobed, with an open U-shaped petiolar sinus; the upper side is opaque green, hairless, with pink-colored main ribs, the lower side is hairless, and the flap is light-green, slightly bent, thick, the main ribs are intensely purple-colored.
Woody shoot: long, well branched, elastic, hairless, purple-dark brown.
Ability to promote fruit setting:
Root system regeneration:
Adaptability to soil type:
- compact: acceptable
- wet: poor
- dry: poor
- stony: poor
- acidic: very poor
- saline: good
Branching pattern of the roots:
expanded, tendentially shallow.
Susceptibility to deficiencies or excesses:
- deficiency of N: sensitive
- deficiency of K: sensitive
- deficiency of Fe: sensitive
- deficiency of Mg: sensitive
- deficiency of Zn: sensitive
- deficiency of B: sensitive
- deficiency of P: low sensitivity
- deficiency of Cu: low sensitivity
Resistance to root phylloxera:
Resistance to leaf phylloxera:
Susceptibility to fungal and plant diseases:
downy mildew: low
powdery mildew: low
anthracnose: very sensitive
eutypa disease: low
rachis desiccation: it promotes sensitivity