PEDIGREE: A diploid hybrid between Northern Brewer and a TG seedling of unknown origin
YIELD: 1600 to 3200 KG/ha
STORAGE STABILITY: Good
RIPENING TIME: Medium early
OTHER INFORMATION: Released in 1971, high content of bitter substances, pleasant aroma, suitable for picking with a picking machine, sensitive to aphids'
RESISTANCE TO DISEASE:
- To downy mildew - Good
- To powdery mildew - Good
BREWING QUALITY: Aroma hop variety of high quality, high contents of bitter substances, excellent bitterness and aroma
BREEDING PROPERTIES: Aurora is a diploid hybrid between Northern Brewer and a TG seedling of unknown origin. It is a medium early variety, its optimal picking time in Slovenia being between August 23 and 30. The plants exhibit a cylindrical form of medium width, the lateral shoots being 60 cm long, they sprout also in the lower part of the plant. The vines are slightly purple, of medium thickness, with short interodes. The leaves are smooth and of medium size, their edges tend to become dry under unfavorable conditions. The rootstock is slightly susceptible to downy mildew, the leaves are resistant, the cones slightly susceptible. It is sensitive to aphids. The expected yield is about 3200 KG/ha. It has a fibrous root system. It is grown on moderately deep clay soil. It can thrive also on loamy clay soil. It is grown in Slovenia, Austria, and Hungary. Medium planting distance is required. The recommended pruning time in Slovenia is between March 25 and April 5. An average cone is 25 mm long, the average weight of 100 dry cones is 15 g. They are dense, of deep green color and do not get shattered when picked by a picking machine. The drying temperature does not exceed 65 C.
CHARACTERISTICAL INGREDIENTS AND BREWING QUALITY: Aurora has an intense and pleasant hoppy aroma. It contains 7 - 13 % of Alpha-acid (22 - 26 % of Cohumulone). The ratio between Alpha and Beta acid is about 2.7. The essential oil content varies from 0.9 to 1.6 % of dry hops. The ratio between Alpha-Humulene and Beta-Caryophyllene in the essential oil is about 3.2. Aurora has a very good storage stability. Beer prepared with this variety has good organoleptical scores. The yield of Alpha-acid is very good when brewing with this variety. Aurora is very suitable for extraction and for combination with other varieties in the brewing process.