Eclipse blackberry variety

Rating [ 5 ]

Thornless, semi-erect, high quality blackberry that has firm, uniformly shaped, dark fruit suited for the fresh market

Botanical designation

Rubus subgenus Rubus Watson 'Eclipse'

Originated from a cross of

Originated from a cross of Triple Crown x ORUS 1393-1

Variety denomination

Variety denomination - 'Eclipse', tested as ORUS 2816-4

Plants are

Plants are thornless

Bushes have

Bushes have semi-erect canes

Fruit weight is

Fruit weight is 6 g


Berries have a conical shape

Fruiting habit

Fruiting habit - floricane fruiting (summer-bearing)

Begins to bloom in the

Begins to bloom in the third week of May

Harvest season starts in the

Harvest season starts in the third week of July

Productivity is

Productivity is 8 kg per plant

Soluble solids

Soluble solids - 13.8%


Acidity - 0.99%

Cold hardiness is

Cold hardiness is excellent

Heat tolerance is

Heat tolerance is moderate

Country of origin

Country of origin - United States


Patent US PP30,448 P3 dated April 28, 2019

Current status

Current status - cultivated (actual)

Eclipse (ORUS 2816-4) is thornless semi-erect blackberry cultivar with medium-large, firm, dark fruit. Eclipse is introduced as a high quality blackberry that has medium-sized, uniformly shaped berries that ripen in the early season where it is firmer or earlier than current standards. Developed by C.E. Finn and others in United States, Oregon.
Eclipse has high-quality fruit in the early semi-erect season and vigorous productive plants. Fruit is uniformly shaped and firm. The primocanes of Eclipse are slightly less vigorous than those of Chester Thornless and Triple Crown. Eclipse has moderate yields with yields comparable to the other commercial cultivars.
Cultivar has an excellent size for clamshell packaging.
Fruits are medium-large, average fruit weight is about 6 g with blocky-conical shape. Fruit shape can be affected by drupelet fertility, and although Eclipse had the highest rating for fertility, it was not statistically different from the Triple Crown and Chester Thornless. Berries have excellent black color that is comparable to Chester Thornless, and although statistically darker than Triple Crown, the color was not meaningfully different from Triple Crown.
Eclipse was rated as having comparable firmness and skin toughness to Chester Thornless and rated much better than the softer, more tenderskinned Triple Crown. This combination of firmness, uniformity of shape, medium size, and excellent skin toughness make Eclipse an excellent candidate for shipping in clamshells in the wholesale fruit market. When eaten fresh, blackberry Eclipse fruit flavor was as good as the highly regarded Triple Crown and better than Chester Thornless.
Blackberry Eclipse ripens with or before Navaho and Triple Crown, the midpoint is comparable to Navaho and 10-14 dayes before Chester Thornless and Triple Crown. In trials Eclipse cultivar ripens at the middle of July. Harvest season's length is about 30 days. Averaged crop from each plant is about 8 kg.
Cold hardiness is very good, has shown no injury in 10 seasons despite temperatures below minus 20 C. Also Eclipse shows very good disease resistance.
Table 1. Yield and average berry weight of Eclipse cultivar at Oregon State University’s North Willamette Research and Extension Center (planted in 2013)
Cultivar Berry weight, g Yield, kg/plant
2015 2016 2017
Eclipse 6.4 6.65 7.20 12.71
Chester Thornless 6.3 8.40 10.89 15.60
Triple Crown 8.1 11.44 9.14 14.39
Table 2. Subjectively evaluated fruit quality traits of Eclipse, Chester Thornless and Triple Crown blackberries (planted in 2013, scale from 1 to 9, where 9 is the best)
Cultivar Eclipse Chester Thornless Triple Crown
Drupelet fertility 6.9 6.0 6.5
Firmness 8.6 8.4 6.1
Color 9.0 9.0 8.8
Shape 6.9 6.0 6.1
Texture 5.9 5.1 5.5
Flavor 7.3 5.2 7.2
Toughness 8.4 8.3 5.5
Glossiness 8.8 7.8 7.9
Table 3. Soluble solids, pH and titratable acidity of fruit for several blackberry varieties (2011 - 2017 years, avg.)
Cultivar Soluble solids, % Titratable acidity, % pH
Eclipse 13.5 0.97 3.41
Black Diamond 11.29 1.27 3.36
Čačanska bestrna 9.72 1.15 3.29
Chester Thornless 12.43 1.07 3.28
Columbia Giant 11.40 1.87 3.17
Columbia Star 12.32 1.40 3.23
Columbia Sunrise 13.61 0.75 3.64
Galaxy 12.26 1.08 3.45
Hall's Beauty 13.46 1.31 3.35
Marion 13.45 1.60 3.20
Navaho 14.41 1.03 3.36
Osage 12.01 0.89 3.70
Triple Crown 14.95 0.93 3.53
Tupy 12.86 0.86 3.66
Von 12.35 0.70 3.56
Table 4. Harvest season (avg. from 2015 - 2017, planted in 2013)
Cultivar Ripening
First (5%) Peak (50%) Last (95%)
Eclipse July 12 July 17 August 7
Columbia Star June 20 June 26 July 7
Hall's Beauty June 22 June 26 July 10
Black Diamond June 20 June 30 July 17
Marion June 24 June 30 July 15
Von July 10 July 17 August 4
Triple Crown July 17 July 31 August 9
Chester Thornless July 17 August 2 August 21
Prime-Ark 45 (prim.) August 25 Sept. 13 Sept. 29

How to cultivate blackberry

How to cultivate blackberry Eclipse?

A standard cultural practices for semierect Oregon blackberry production:
1. Annual pre- and post-emergent herbicide applications;
2. Spring nitrogen fertilization (78 kg N/ha);
3. Post-harvest removal of floricanes;
4. Training of primocanes to a two-wire trellis;
5. Weekly overhead application of 2.5 to 5.0 cm of irrigation during the growing season depending on rainfall;
6. Dormant applications of liquid lime sulfur and copper hydroxide were made to control leaf and cane spot, purple blotch, orange rust and anthracnose;
7. Timely applications of pesticides during the season;
8. One-time application of ferrous sulphate in late fall.
Diseases resistance

What diseases is blackberry Eclipse resistant to?

Eclipse is resistant to most fungal diseases
Diseases susceptibility

What diseases is blackberry variety Eclipse vulnerable to?

Eclipse is quite prone to diseases such as Cane Blight
Useful Growing Guides

Useful Growing Guides:

Doyle's Thornless
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Evergreen Thornless
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EMCO CAL - Blackberry variety Eclipse - English subtitles
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