USDA ACCESSION NO.: 21185
SELECTION: Unknown, probably old German landrace
CULTIVAR: Hersbrucker , sometimes called Hersbrucker-G (origin from Germany), Hersbrucker Late, or Hersbrucker Spaet
PEDIGREE: Unknown, thought to be in the Saazer group of varieties (Saazer Formenkreis)
PRIMARY SITE: USDA World Hop Cultivar Collection, OSU East Farm
ORIGIN: Unknown, probably selection from an old landrace
DATE RECEIVED: Spring 1978
METHOD RECEIVED: Rhizomes
AVAILABILITY: No restrictions, commercial variety
REFERENCES: Kohlmann, H., and A. Kastner. Der Hopfen. p. 36. Hopfenverlag Wolnzach 1975.
Maier, J. 1978. Chemical determination of hop varieties. (in German). Hopfenrundschau 29:258-263.
Maier, J. 1978. Storage stability of new hop varieties in comparison with established varieties (in German). Hopfenrundschau 29:370-372.
Maier J., and J. Freundorfer. 1989. Hop varieties, quality groups and breeding. (in German). Hopfenrundschau 29:370-372.
LEAF COLOR: Dark green
DISEASES: Downy Mildew: tolerant to moderately susceptible
Verticillium wilt: tolerant to moderately resistant
Viruses: infected with some hop viruses, but
virusfree clones are now available
VIGOR: Very good
YIELD: Good to very good
SIDEARM LENGTH: 12-36 inches
ALPHA ACIDS: 4.6% (10-year range 3.8 to 7.4%)
BETA ACIDS: 6.8% (10-year range 5.0-8.6%)
STORAGE STABILITY: Fair (retained 62% of original alpha acids after 6 months room temperature storage)
OIL: 0.68 ml/100 g; H/C = 3.21, humulene 26.5%
MAJOR TRAITS: tolerant to verticillium wilt; late maturity; produces best yields when grown on a slant (Schraegaufzug) in Germany.
OTHER INFORMATION: Major German hop variety which has recently replaced Hallertauer Mittelfrueh in world markets because of its resistance to verticillium wilt. Various virusfree clones were developed in Germany in the 1980's which supposedly had higher alpha acids potential (USDA 21514, 21515, 21516, 21517, 21518). All have a reddish stem similar to the original Hersbrucker, but the alpha acids potential did not improve. Another Hersbrucker (USDA 21179, Hersbrucker-E) was obtained in 1977 from the Hop Research Institute WyeCollege, England. It is identical to the German Hersbrucker but more infected with viruses. International brewers (such as Anheuser Kirin) who have readily accepted Hersbrucker as a replacement for Hallertauer Mittelfrueh or other aroma hops are now reducing their purchases in favor of new German aroma hops such as Hallertauer Tradition and Spalter Select which were released in 1991. In 1997, total German production of Hersbrucker was 10.59 mill. Lbs on 7,670 acres, about 14 % of total German hop production.