Ulmus americana 'L'Assomption'

Ulmus americana 'L'Assomption'
Species	Ulmus americana
Cultivar	'L'Assomption'
Origin	L'Assomption Experimental Station, Quebec, Canada

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]}

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] [5]}

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

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. 94 (1). Oxford University Press (OUP): 162–166. doi: 10.1603/0022-0493-94.1.162 . ISSN   0022-0493. PMID   11233108. S2CID   42980569.
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. 94 (2). Oxford University Press (OUP): 445–448. doi: 10.1603/0022-0493-94.2.445 . ISSN   0022-0493. PMID   11332837. S2CID   7520439.
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