USDA ACCESSION No.: 21499

SELECTION: no published information available

GENUS: humulus

SPECIES: lupulus

CULTIVAR: Zenith

PEDIGREE: no published information available

PRIMARY SITE: USDA-OSU Hop Research Farm, East Farm, Corvallis, OR

ORIGIN: seedling selection from a cross made at Wye College, England in the 1970s

DATE RECEIVED: spring 1987

METHOD RECEIVED: rhizomes

AVAILBILITY: no restrictions, commercial variety

REFERENCES: Neve, R.A., and P. Darby. Wye College Annual Report for Hop Research, 1983, page 39.

Neve, R.A. Hops. Chapman and Hall. London, New York, 1991.

Various USDA Annual Reports for Hop Research starting in 1987.

MATURITY: medium early

LEAF COLOR: green

SEX: female

DISEASES: Downy mildew: resistant

Powdery mildew: resistant

Verticillium Wilt: susceptible

Viruses: Free of all major hop viruses when received

VIGOR: fair to good

YIELD: fair to poor in USDA test plots at Corvallis, good in England.

SIDE ARM LENGTH: 12 to 20 inches

ALPHA ACIDS: 9 to 11%

BETA ACIDS: 3%

COHUMULONE: 25%

STORAGE STABILITY: very good, retained 82% of original alpha acids after 6 months room temperature storage

OIL: 1.76 ml/100 g. Humulene 18.4%; caryophyllene 6.9%; Myrcene 52.3%; farnesene trace. H/C ratio = 3.24

MAJOR TRAITS: high alpha acids content, resistance to both Downy and Powdery mildew.

OTHER INFORMATION: Valuable for mildew disease reistant hops.

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