Paulsen 775
Origin: A Berlandieri x rupestris hybrid, obtained by
Paulsen in Palermo, Sicily in 1894
Description:
Tip of the growing shoot: upright, flat, triangular,
cobwebby, half-enclosed by the developing leaves which are greenish-bronze with
wine-red edges; axis green, cobwebby.
Lower young leaf:
orbicular, entire, dark green, glabrous on the upper surface, primary veins
wine-red, slightly pubescent On the lower surface; petiolar sinus V—U-shaped,
open; teeth irregular, convex, broader than long, mucronate. 775 P defoliates
late.
Petiole: rather
short, reddish-brown, pubescent.
Shoot:
semi-upright in growth-habit with vigorous summer laterals, internodes
wine-red, nodes not enlarged, violet-red, pubescent.
Flower: male,
always sterile.
Tendril:
bifurcated, violet-red, brush-like hairs at the base.
Cane: very thick,
dark chocolate-brown, ribbed, polygonal in cross-section with a small pith and
fairly broad diaphragm; wood very hard.
Dormant bud:
small, dome-shaped, longer than broad, sharply pointed.
One-year-old root system resembles that of 110 R.
Aptitudes:
According to Pastena (14) the cuttings of 775 P root and graft fairly well.
This rootstock has a very good affinity with commercially cultivated V.
vinifera varieties in Italy. In fertile soil its grafted vines are too
vigorous, accompanied by a poor fruit set. 775 P accommodates itself well to
soils which become dry and compact during summer, and also tolerates stagnant
water in the soil. It can support up to 17 per cent active lime in the soil
(14). Cosmo et al. (8) considered it to be the best rootstock obtained by
Paulsen
Distribution: 775
P is practically unknown outside Italy. Its ungrafted vines grow very
vigorously in dry badly-drained clay soils in South Africa.
From: Rootstocks for Grapevines. DP
Pongracz
No comments:
Post a Comment