USDA ACCESSION NO.: 65102

SELECTION: Selection No. L 1 by C. B. Skotland from a commercial yard of Late Cluster in the Yakima Valley in the late 1950's.

GENUS: Humulus

SPECIES: lupulus

CULTIVAR: Yakima Cluster

PEDIGREE: Unknown. Late Cluster was developed from Pacific Coast Cluster. Probably originally derived from a native North American hop.

PRIMARY SITE: Irrigated Agriculture Research and Extension Center, Prosser, WA.

ORIGIN: Clonal selection from Late Cluster made at Prosser, WA.

DATE RECEIVED: 1965

METHOD RECEIVED: Rhizomes

AVAILABILITY: No restrictions, commercial variety

REFERENCES: Skotland, C. B. Improvement of Cluster hops. MBAA Technical Quarterly 10(3). 119 122. 1973.

Romanko, R. R., in S. S. Steiner's Guide to American Hops. S. S. Steiner, Inc., New York, 1973, p. 25.

Brooks, S. N., C. E. Homer, S. T. Likens, Hop Produc­tion. Agriculture Information Bulletin 240. USDA ARS 1961.

MATURITY: Early

LEAF COLOR: Medium green

SEX: Female

DISEASES: Downy Mildew: susceptible

Verticillium wilt: resistant

Viruses: free of prunus necrotic ringspot and apple mosaic virus, gradually becoming reinfected over a 10 to 15 year period in commercial plantings.

VIGOR: Excellent

YIELD: High, 1800 to 2000 lbs/acre

SIDE ARM LENGTH: 18 36 inches

ALPHA ACIDS: 7.1% (10 year range: 4.4 to 9.8%)

BETA ACIDS: 4.3% (10 year range: 3.0 to 6.1%)

COHUMULONE: 42%

STORAGE STABILITY: Very good

OIL: 0.47 ml/100 g (10 year range: 0.24 to 0.90)

MAJOR TRAITS: Similar to Early Cluster (E 2) but narrower range of adaptation.

OTHER INFORMATION: Does not grow well in Idaho. Not adapted to western Oregon because of downy mildew susceptibility. Generally grouped with Early Cluster by the trade. Chemically and in brewing indistinguishable from Early Cluster or any other Cluster hop. Listed in trade statistics under ACluster@ hops. (1997 Cluster production: 3697 acres (8.38 million lbs), in Idaho and Washington, none in Oregon.


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