Technical Sheet

161.49 x 3309C

Gravesac

Origin: France (R. Pouget – INRA Bordeaux – 1962).

VEGETATIVE FEATURES

Leaf: large, wedge-shaped, whole, with an open U-shaped petiolar sinus, the upper side is hairless and the flap is bullous, dark green-colored, opaque; the lower side is bristly, green-colored, with light-green ribs.

Woody shoot: long, branched, with more than average development of secondary shoots, elastic, striated, hairless, pruinose, of gray-brown color.

CULTURAL APTITUDES

Ability to promote fruit setting:

good

Root system regeneration:

acceptable

Adaptability to soil type:

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

Branching pattern of the roots:

semi-taproot

Tendency to emission of suckers:

average

Susceptibility to deficiencies or excesses:

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

OTHER INFORMATION

Behavior in the nursery: it shows ease in rooting and vegetative resumption; the root system consists mainly of thin and medium-sized roots.

Behavior in the propagation block: it is advisable to grow it on trellis and carefully keep the production capacity of young plants under control.

Behavior in the open field: it impresses good vigor and an acceptable production capacity; it is suitable to dense planting on the row; it induces an early vegetative process and has a constant production. Few cases of decay have been observed in combination with some varieties.