USDA ACCESSION No.: 21279

SELECTION: selected in the late 1800s by Mr. Keyworth in England

GENUS: humulus

SPECIES: lupulus

CULTIVAR: Keyworths Midseason

PEDIGREE: no information available

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

ORIGIN: probably a mutant selected in an established commercial hop yard in England

DATE RECEIVED: spring 1980

METHOD RECEIVED: rhizomes

AVAILBILITY: no restrictions, commercial variety

REFERENCES: Burgess, A.H. Hops. Leonard Hill Books. New York and London. 1964.

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

MATURITY: medium early

LEAF COLOR: light green

SEX: female

DISEASES: downy mildew: moderately resistant

Verticillium wilt: modrately resistant

Viruses: no information

VIGOR: good to very good

YIELD: good to very good, 1,500 to 2,200 lbs/acre in Corvallis test plots

SIDE ARM LENGTH: 18 to 30 inches

ALPHA ACIDS: 7.5%

BETA ACIDS: 3.1%

COHUMULONE: 46%

STORAGE STABILITY: fair to poor, retained about 49% of original alpha acids after 6 months room temperature storage

OIL: 0.89 ml/100 g. Humulene 13.4%; caryophyllene 10% myrcene 55.8%; farnesene trace.

MAJOR TRAITS: pleasant continental aroma, high yield potential

OTHER INFORMATION: used as an aroma hop primarily in England.

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