Ulmus americana 'Ascendens'
| Ulmus americana | |
|---|---|
| Cultivar | 'Ascendens' |
| Origin | Seneca Park, Rochester, New York |
The American Elm cultivar Ulmus americana 'Ascendens' is a relatively old clone.
Contents
Description
The tree has small, fastigiate lateral branches forming a narrow, oval head.[1]
Pests and diseases
The clone's resistance to Dutch Elm Disease is not known, but the species is highly susceptible to the disease and Elm Yellows; it is also moderately preferred for feeding and reproduction by the adult Elm Leaf Beetle Xanthogaleruca luteola [2] [2], and highly preferred for feeding by the Japanese Beetle Popillia japonica [3] [3] [4] in the USA. U. americana is also the most susceptible of all the elms to verticillium wilt.[4]
Cultivation
The tree is not known to have been cultivated beyond the USA.
Etymology
Named in 1927 for a tree grown in Seneca Park, Rochester, New York.
Accessions
North America
Arnold Arboretum. Acc. no. 140-61.
References
- ↑ Green, P. S. (1964). Registration of cultivar names in Ulmus. Arnoldia, Vol. 24. Arnold Arboretum, Harvard University. [1]
- ↑ Miller, F. and Ware, G. (2001). Resistance of Temperate Chinese Elms (Ulmuss spp.) to Feeding of the Adult Elm Leaf Beetle (Coleoptera: Chrysomelidae). Journal of Economic Entomology 94 (1): 162-166. 2001. Entom. Soc.of America.
- ↑ Miller, F., Ware, G. and Jackson, J. (2001). Preference of Temperate Chinese Elms (Ulmuss spp.) for the Feeding of the Japanese Beetle (Coleoptera: Scarabaeidae). Journal of Economic Entomology 94 (2). pp 445-448. 2001. Entom. Soc.of America.
- ↑ Pegg, G. F. & Brady, B. L. (2002). Verticillium Wilts. CABI Publishing. ISBN 0-85199-529-2
