Ulmus davidiana var. japonica 'JFS-Bieberich'

Ulmus davidiana var. japonica 'JFS-Bieberich' (sold as Emerald Sunshine) is a Japanese Elm cultivar that was raised by the Sunshine Nursery, Oklahoma, from seed collected in China by proprietor Steve Bieberich.^[1] Emerald Sunshine proved only moderately successful in the US National Elm Trial, averaging a survival rate of 70% overall.^[2]

Ulmus davidiana var. japonica 'JFS-Bieberich'
Variety	Ulmus davidiana var. japonica
Cultivar	'JFS-Bieberich' = Emerald Sunshine
Origin	Sunshine Nursery, Oklahoma, US

Description

Emerald Sunshine attains a height of 9 m and develops a neat vase shape, the crown < 7.5 m in width borne by a stout stem. The cultivar has thick, deep-green leaves turning dull yellow in the fall. Trees planted as part of the National Elm Trial at the Bowley Plant Science Teaching Center, U C Davis, in northern California grew comparatively slowly, increasing in height by 1 m and d.b.h. by 1.6 cm per annum.^[3] The tree was summarized by Michael Dirr, Professor of Horticulture at the University of Georgia as 'impressive' .

Pests and diseases

Emerald Sunshine is resistant to Dutch elm disease and Elm Yellows (Phloem necrosis). Foliage of trees under assessment at the aforementioned National elm trial site at U C Davis suffered minimal damage caused by the elm leaf beetle Xanthogaleruca luteola,^[3] whilst damage caused by Japanese Beetle in trials at the University of Kentucky was found to be slight, owing to the dense pubescence on the underside of the leaves.^[4][5]

Cultivation

Emerald Sunshine is tolerant of high pH levels and soil compaction; it is also very resistant to desiccating winds.^[1] The species does not sucker from roots.^[6]

The cultivar is represented in Europe by five young grafted trees at the Noordplant nursery, Glimmen, The Netherlands; it is not known to have been introduced to Australasia.

Accessions

North America

• University of Idaho Arboretum, US. Acc. no. 2006033

Nurseries

North America

• J. Frank Schmidt & Son Co. , Boring, Oregon, US.

Synonymy

• Ulmus propinqua C. K. Schneid. 'JFS-Bieberich' = Emerald Sunshine

Etymology

Named 'JFS' for the J. Frank Schmidt nursery, Oregon, and 'Bieberich' for the proprietor of the Sunshine Nursery in Oklahoma.

References

1. Davis, T. (2007). Ulmus Emerald Sunshine. Nursery Management & Production, August 2007
2. Griffin, J.; et al. (2017). "Ten-Year Performance of the United States National Elm Trial" (PDF). Arboriculture & Urban Forestry. 43(3):107–120. International Society of Arboriculture, Atlanta, US.
3. McPherson, G. et al. (2008). National elm trial: Initial report from Northern California. Western Arborist, Fall 2009, 32–36.
4. Brady, C., Condra, J., & Potter, D. (2008) Resistance of Landscape-suitable Elm (Ulmus spp.) Cultivars to Japanese Beetle, Leaf Miners, and Gall Makers. 2008 Research Report, Nursery & Landscape Program, 15–16. University of Kentucky.
5. Dirr, M. (2009). 'Future Tree Selections'. Western, Spring 2009,  p.8. Western Nursery & Landscape Association, St Joseph, Missouri.
6. Heybroek, Hans M. (1981). "The Japanese elm species and their value for the Dutch elm breeding program" (PDF). Proceedings of the Dutch Elm Disease Symposium and Workshop, October 5–9, Winnipeg, Manitoba: 78–90.

External links

• http://treehealth.agsci.colostate.edu/research/nationalelmtrial/NationalElmTrial.htm