Ulmus americana 'L'Assomption'

The American Elm cultivar Ulmus americana 'L'Assomption' was selected from seedlings grown from X-irradiated seed at the eponymous experimental station in Quebec before 1965.[1][2]

Ulmus americana 'L'Assomption'
SpeciesUlmus americana
Cultivar'L'Assomption'
OriginL'Assomption Experimental Station, Quebec, Canada

Description

'L'Assomption' is a very slow-growing tree.

Pests and diseases

The tree is highly resistant to Dutch elm disease [1]. No other specific information is available, but the species as a whole is highly susceptible to Elm Yellows; it is also moderately preferred for feeding and reproduction by the adult Elm Leaf Beetle Xanthogaleruca luteola [3], and highly preferred for feeding by the Japanese Beetle Popillia japonica [4] [5] in the United States. U. americana is also the most susceptible of all the elms to verticillium wilt.[6] [7]

Cultivation

The tree is not known to be in cultivation beyond Canada.

Accessions

North America
  • Morden Arboretum, Morden, Canada. Two trees received 1970 from the Forest Research Laboratory in Sillary, Quebec. Acc. no. 65-0328
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References
  1. Ouellet, C-E., & Pomerleau, R., (1965). Can. J. Bot. 1965; 43:85-96
  2. Santamour, Frank S.; Bentz, Susan E. (May 1995). "Updated Checklist of Elm (Ulmus) Cultivars for use in North America". Journal of Arboriculture. 21 (3): 122–131. Retrieved 20 June 2016.
  3. 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.CS1 maint: ref=harv (link)
  4. 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.
  5. "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.
  6. Pegg, G. F. & Brady, B. L. (2002). Verticillium Wilts. CABI Publishing. ISBN 0-85199-529-2
  7. "Elm Leaf Beetle Survey". Archived from the original on 2011-07-19. Retrieved 17 July 2017.


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