Ulmus americana 'Littleford'
| Ulmus americana | |
|---|---|
| Cultivar | 'Littleford' |
| Origin | Sherman Nursery, Charles City, Iowa, USA |
The American Elm cultivar Ulmus americana 'Littleford' was cloned from a tree in Hinsdale, Illinois, circa 1915 and first released in 1927.
Description
The tree is narrowly vase-shaped with larger and heavier leaves.
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 [1] , and highly preferred for feeding by the Japanese Beetle Popillia japonica [2] in the USA. U. americana is also the most susceptible of all the elms to verticillium wilt.[3]
Cultivation
'Littleford' was marketed by the Sherman Nursery, Charles City, Iowa, as late as 1957, but is no longer listed by that emporium or any other.[4] The tree is not known to have been introduced to Europe or Australasia.
Synonymy
- Ulmus americana var. Littlefordii: Bailey & Bailey, Hortus Second, 746, 747, 1941.
Accessions
- North America
- Morton Arboretum. Acc. no. 862-43.
References
- ↑ 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
- ↑ Green, P. S. (1964). Registration of cultivar names in Ulmus. Arnoldia, Vol. 24. Arnold Arboretum, Harvard University.