| Ulmus americana 'Littleford' | |
|---|---|
| Species | Ulmus americana |
| Cultivar | 'Littleford' |
| Origin | Sherman Nursery, Charles City, Iowa, US |
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 as a whole 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][3] in the United States. U. americana is also the most susceptible of all the elms to verticillium wilt.[4][5]
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.[6] 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, US. Acc. no. 862-43.
References
- ^ Miller, Fredric; Ware, George (2001-02-01). "Resistance of Temperate Chinese Elms (Ulmus spp.) to Feeding by the Adult Elm Leaf Beetle (Coleoptera: Chrysomelidae)". Journal of Economic Entomology. Oxford University Press (OUP). 94 (1): 162–166. doi:10.1603/0022-0493-94.1.162. ISSN 0022-0493. PMID 11233108.
- ^ Miller, Fredric; Ware, George; Jackson, Jennifer (2001-04-01). "Preference of Temperate Chinese Elms ( Ulmus spp.) for the Adult Japanese Beetle (Coleoptera: Scarabaeidae)". Journal of Economic Entomology. Oxford University Press (OUP). 94 (2): 445–448. doi:10.1603/0022-0493-94.2.445. ISSN 0022-0493. PMID 11332837.
- ^ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
- ^ Pegg, G. F. & Brady, B. L. (2002). Verticillium Wilts. CABI Publishing. ISBN 0-85199-529-2
- ^ "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
- ^ Green, Peter Shaw (1964). "Registration of cultivar names in Ulmus". Arnoldia. Arnold Arboretum, Harvard University. 24 (6–8): 41–80. Retrieved 16 February 2017.