Autumn Royal
Obtained in 1981 by David Ramming and Ron Tarailo from the USDA ARS of Fresno (California) from a crossbreed between Autumn Black x C74 1.
Budburst period:medium-late.
Ripening period: late.
Vigor: good.
Real fertility: 0,4.
Production: average, 25 T/Ha.
Detachment index: 544g.
Cluster weight: 900/1200g.
Berry weight: 7 g.
Grape seeds: seedless or with herbaceous vestigial remnants.
Sugar content: 17 (°Brix).
Total acidity: 5,2 (g/L).
pH: 3,87.
Vegetation management : with the norm.
Affinity with rootstocks: good with 1103 Paulsen, 110Richter and Kober5bb. Poor on 140 Ruggeri due to graft hyperplasia.
Storage aptitude: good.
Transportation resistance: good.
Ampelographic characters:
very long cluster, cylindrical or conical, averagely compact with 1-3 wings. The berry is medium-large with a truncated ovoid shape; the skin is blue-black. The pulp is crisp and colorless, with a neutral flavor.
Training system and pruning:
- Training system: the variety adapts well to pergola, with a planting layout of 2.5 x 2.5 m or 2.3 x 2.3 m;
- Pruning: long, with at least 15 buds per fruiting cane, in other words: 60 buds/plant.
Sensitivity to diseases and adversities:
average.