University of Vermont Extension
SystemDepartment of Plant and Soil Science
University of Vermont Extension
SystemCOH 37
Leonard P. Perry, Extension Professor
Matthew H. Wood, Graduate Student
| Variety1 | 1997 | Average | Range (# years) | '97 ('96)Yields |
| Aquila (H) | 4.94 | 5.26 | 4.00-7.21 (8) | 7.0(8) |
| Aquila (M) | 5.46 | 5.48 | 3.62-6.87 (5) | 15.1(18) |
| Backa (H) | 2.31 | 1.67 | 0.38-3.45 (8) | 3.0(3) |
| Backa (M) | 2.94 | 2.54 | 2.15-2.94(2) | 2.5(5) |
| Banner (M) | 7.94 | 9.28 | 7.94-10.04 (3) | 3.0(15) |
| Blue Northern Brewer (M) | -- | 5.42 | (1) | --(1) |
| Brambling Cross (M) | 6.29 | 6.29 | (1) | 1.0(--) |
| Brewer's Gold (M) | 9.25 | 9.15 | 8.77-9.44 (3) | 31.7(55) |
| Bullion (M) | 8.67 | 9.91 | 8.67-11.20(2) | 17.3(41) |
| Cascade (H) | 4.30 | 4.41 | 4.07-5.12 (4) | 30.0(14) |
| Centennial (H) | 8.93 | 8.50 | 6.97-9.59 (3) | 2.6(4) |
| Centennial (M) | 11.20 | 10.52 | 9.84-11.20(2) | 11.3(4) |
| Chinook (H) | 8.48 | 9.31 | 6.82-11.14 (8) | 34.0(29) |
| Chinook (M) | 9.71 | 9.35 | 8.99-9.71 (4) | 9.0(26) |
| Chinook (Hill) | -- | 11.71 | (1) | --(--) |
| Cluster (M) | -- | 8.43 | (1) | --(12) |
| Elsasser (H) | -- | 0.84 | 0.50-1.33 (4) | --(3) |
| Elsasser (M) | 2.74 | 2.15 | 1.57-2.74(2) | 2.0(4) |
| Eroica (M) | 6.07 | 7.46 | 5.22-10.55 (4) | 15.0(24) |
| Fuggles (H) | -- | 2.64 | 0.87-3.88 (4) | --(-- ) |
| Fuggles (M) | 2.86 | 3.46 | 2.36-4.93 (4) | 3.0(11) |
| Fuggles (Hargy) | -- | 5.12 | (1) | --(--) |
| Galena (H) | 8.64 | 9.42 | 5.18-12.90 (8) | 16.0(18) |
| Galena (M) | 7.56 | 9.42 | 8.78-11.93 (3) | 5.9(18) |
| Galena (Hill) | -- | 10.23 | (1) | --(--) |
| Hersbrucker (H) | -- | 0.74 | 0.71-0.76 (2) | --(--) |
| Liberty (H) | -- | 4.23 | (1) | --(--) |
| Liberty (M) | -- | 4.33 | 2.66-5.94 (3) | --(5) |
| Liberty (Hargy) | -- | 6.17 | (1) | --(--) |
| Mt. Hood (H) | -- | 1.68 | 1.24-2.12 (2) | --(--) |
| Mt. Hood (M) | -- | 4.54 | 2.41-6.66 (2) | --(5) |
| Northdown (M) | 7.83 | 8.49 | 7.83-9.15(2) | 1.7(--) |
| Nuggett (H) | 11.90 | 10.44 | 5.73-14.45 (8) | 20.8(7) |
| Nuggett (M) | 10.50 | 9.53 | 8.54-10.50(2) | 5.3(20) |
| Nuggett (Hill) | -- | 12.62 | (1) | --(--) |
| Olympic (M) | 6.34 | 6.34 | (1) | 4.0(--) |
| Perle (H) | -- | 4.05 | 2.60-6.14 (4) | --(--) |
| Perle (M) | 3.55 | 7.76 | 6.22-11.34 (4) | 4.0(17) |
| Saaz (H) | 1.13 | 2.14 | 1.00-3.71 (7) | 1.3(--) |
| Saaz (M) | 3.72 | 4.05 | 3.72-4.38(2) | 2.5(1) |
| Saxon (M) | 6.96 | 6.96 | 6.95-6.96(2) | 1.8(--) |
| Spalt (M) | 2.58 | 2.58 | (1) | 1.3(--) |
| Styrian Goldings (M) | 2.27 | 3.85 | 2.27-6.10 (3) | 3.3(4) |
| Tettnanger (H) | 0.84 | 1.05 | 0.71-1.60 (3) | 1.5(--) |
| Tettnanger (M) | -- | -- | -- | 0.5 |
| Willamette (H) | 3.64 | 4.92 | 3.25-7.76 (8) | 10.0(12) |
| Willamette (M) | 6.06 | 5.68 | 3.74-8.75 (5) | 6.9(16) |
| Wild (M--Bolton, VT) | -- | 3.69 | (1) | (--) |
| Wild (M--Greensboro, VT) | 8.44 | 7.02 | 5.86-8.44 (3) | 36.0(52) |
| Wild (M--N. Dakota) | 3.78 | 3.78 | (1) | 3.0 |
| Wild (M--Morrissville, VT) | -- | 5.24 | (1) | (--) |
| Wild (Overlook) | 5.31 | 5.31 | (1) | (--) |
| Wild (M--Rouses' Pt., NY) | 6.81 | 6.81 | (1) | 20.0 |
| Wild (M--Sudbury, MA) | 5.88 | 5.54 | 5.20-5.88 (2) | 29.0 |
| Wild (M--Westford, VT) | -- | 6.08 | 4.29-7.76 (3) | 1.5(10) |
1997 Season Outline
Fertilization-- Lawnsense pelletized fertilizer applied to hills in mid-May. Heavy top-dressings of compost were used to improve soil fertility at regular intervals thereafter
Training on strings/stripping lower leaves-- By 5/22 strings were up at both Milton and HRC and 2-4 bines were being trained up each string. On 6/11 leaves were stripped from the lower 3 feet of bines at both HRC and Milton, plants are 2 ft. above 7 ft. crosswire at Milton! Training and stripping continues for almost every visit to the hop yards for the rest of the season.
Weed control-- Hand weeding close to the small plants started on 5/24, about 2 weeks later than I should have. Round-up used for weed and grass control at Milton on 5/28, 6/11, 6/30, and at end of season. Hand weeded and raked on 8/3. At HRC roundup was used on 6/11 and 7/2, and hand weeding and raking was done on 7/16 and other times to a lesser extent. Round-up applied to hills at HRC at end of season for weed and grass control
Predatory Mites released-- Phytoseiulus persimilis released as a predator against the two spotted spider mite. These predators were ordered in anticipation of a mite problem that never happened. Predators arrived in the mail and were released anyway at both HRC and Milton.
Harvest-- took place at HRC on 8/24 and 9/4, and at Milton on 8/25, 8/26, 8/27, 8/30, and 8/31. All cones were hand picked and the yield was recorded by taking the fresh weights of cones from each plant. Once dried, samples were taken from each variety for alpha-acid analyses. The rest were stored in a freezer for use at a later date.
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