Ulmus 'Wanoux'

Description

is a narrow tree primarily intended for street planting. The glossy, dark-green leaves, file:Ulmus VADA leaves.JPG|VADA leaves file:Ulmus VADA samarae 2.jpg|VADA samarae 2015 Vada.jpg|VADA, aged 8 years, Great Fontley, UK

Pests and diseases

Tests in France by INRA found the tree to be 'highly resistant' to Dutch elm disease, exhibiting the lowest wilting percentage of all the clones trialled, making it comparable with 'Sapporo Autumn Gold' However, the presence of U. wallichiana in the ancestry of poses the risk of susceptibility to elm yellows (phloem necrosis), which seriously damaged its Dutch stablemate 'Lobel' used as a control in the Italian elm breeding programme. The clone has also proven susceptible to Coral spot fungus Nectria cinnabarina in the Netherlands.

In trials in southern England, the leaves were found to remain completely free of black spot.

Cultivation

has moderate vigour, attaining a height of 14 m at 20 years of age in France. Among urban introductions in the UK are three specimens, planted in 2014, towards the east end of Broad Walk, Christ Church Meadow, Oxford, and four in Inverleith Park, Edinburgh, planted c.2012. 300 VADA were planted circa 2019 in the Parc de Sceaux, southern Paris, and early in 2021 92 were planted in the jardin des Tuileries.

'Wanoux' has been planted in the Netherlands, notably among the line of 140 elms on the ‘s-Gravelandsevaartweg, Loosdrecht (ten trees near the southern end, north of the 'Plinio', planted 2014), part of Wijdemeren City Council's elm collection, assembled since 2003 by tree manager Martin Tijdgat and his colleagues.

is not known to have been introduced to Australasia. File:La prairie sous les ormes (Parc de Sceaux, France) (46978012675).jpg|'Wanoux' avenue in the Parc de Sceaux, 2019 File:Jardin des Tuileries-7809883 (52093933206).jpg|'Wanoux' in the Tuileries, May 2022 File:Jardin des Tuileries in July 2022 5.jpg|'Wanoux' in the Tuileries, 2022 File:Jardin des Tuileries in July 2022 4.jpg|'Wanoux' avenue in the Tuileries, 2022

Notable trees

Former French prime minister Lionel Jospin insisted on planting an elm, the tree of the Left when, in keeping with tradition, he was obliged to plant a tree in the garden of the Hôtel Matignon, his official residence in Paris, in 1998. He chose , then still known only by its Dutch trial identity of '762'. The Left, however, does not have a monopoly on elms. 'The Queen's Elm' planted on the main lawn of Holyrood Palace, Edinburgh, near the ruined Holyrood Abbey to mark the Diamond Jubilee of Elizabeth II (2012), is also an Ulmus . File:Hôtel de Matignon, orme de Lionel Jospin.JPG|Orme de Lionel Jospin, Hôtel Matignon (2015) File:Ulmus 'Wanoux' planted by HM for her Diamond Jubilee. Holyrood Palace, Edinburgh.jpg|'The Queen's Elm', Holyrood Palace (2016)

Etymology

The registered cultivar name 'Wanoux' is a contraction of Wageningen and Champenoux, the locations of the Dutch and French research stations. The selling name VADA was the ancient Roman name of Wageningen.

Accessions

Europe

• Grange Farm Arboretum, Lincolnshire, UK. Acc. no. 693.
• Great Fontley Farm, Fareham, UK. Butterfly Conservation Elm Trials plantation, Home Field: one small sapling planted 2008.
• Longstock Park Arboretum, Longstock, Stockbridge, Hampshire, UK. One small sapling planted 2010.
• Royal Botanic Garden Edinburgh, UK. Acc. no. 20090115.
• Sir Harold Hillier Gardens, Romsey, UK. Acc. no. 2008.0639.

North America

• United States National Arboretum, Washington, D.C., US. 2 small trees.

Nurseries

• Boomkwekerij Ebben, Cuijk, Netherlands.
• F P Matthews 'Trees for Life', Tenbury Wells, Worcestershire, UK. Bare-root whips.
• Van Den Berk (UK) Ltd., London, UK. Standards.

References

References

1. Butterfly Conservation (2023). ''Disease-resistant elm cultivars'' [https://disease-resistant-elms.org], Butterfly Conservation, Lulworth, England.
2. Brookes, A. H. (2025). ''Great Fontley Elm Trial, 2025 Report''   Butterfly Conservation, Lulworth, UK.
3. (July 2007). "Les ormes résistants à la graphiose". IDF.
4. [http://www.resistantelms.co.uk/elms/ulmus-vada/ Herling, D. ''Resistant Elms'']
5. Pinon, J., Lohou, C. & Cadic, A. (1998). Hybrid Elms (Ulmus Spp.): Adaptability in Paris and behaviour towards Dutch elm disease (Ophiostoma novo-ulmi). ''Acta Horticulturae'' 496, 107–114, 1998.
6. Mittempergher, L., (2000). Elm Yellows in Europe. In: ''The Elms, Conservation and Disease Management.'' 103–119. Dunn C.P., ed. Kluwer Academic Press Publishers, Boston, USA.
7. Nijboer, R. (2016). ''Return of the Elm''. 2016 International Elm Conference, Lees Court, Kent, England.
8. The tree is reputedly easily propagated from cuttings. {{tdes. Vada. caps was introduced to North America in 2010, with the supply of two small specimens to the [[United States Department of Agriculture. USDA]], [[Washington, D.C.]], released from quarantine in 2013. {{tdes. Vada
9. [https://www.chch.ox.ac.uk/sites/default/files/2023-08/meadow-trail-winter21-min.pdf 'A brief guide to Christ Church Meadow', p.9; chch.ox.ac.uk]
10. Maxime Maurice, [https://www.canal-u.tv/chaines/iejp/le-jardin-des-tuileries-face-aux-enjeux-patrimoniaux-et-ecologiques-les-chantiers 'Le jardin des Tuileries face aux enjeux patrimoniaux et écologiques les chantiers actuels (2012-2023)']
11. Hanneke Tax, [https://www.boomzorg.nl/article/39420/leeg.asp 'Martin Tijdgat, bomenman van de gemeente Wijdemeren en iepenexpert', 25 May 2022; boomzorg.nl] Contains north to south names-list.
12. Iepenallee, ’s Gravelandsevaartweg, Loosdrecht, Netherlands: M. Tijdgat, [https://edepot.wur.nl/545143 'Ulmus – Gebruikswaarde- en sortimentsonderzoek in de praktijk', ''Dendroflora'' 56, 2020. p.80; edepot.wur.nl]
13. Bart Mullink,[https://www.boomzorg.nl/article/26756/bekering-gemeente-wijdemeren-tot-de-iep-loopt-als-een-trein 'Bekering gemeente Wijdemeren tot de iep loopt als een trein', 23 August 2018; boomzorg.nl]
14. Hanneke Tax, [https://www.boomzorg.nl/article/42599/iepenallee-s-gravelandsevaartweg 'Iepenallee 's-Gravelandsevaartweg', 1 May 2023, boomzorg.nl]
15. 'Survey of the elms of Holyrood Palace', Dr Max Coleman, Royal Botanic Garden Edinburgh, 22/07/2016 (updated 11/08/16)