Ulmus minor 'Ademuz'

The Field Elm Ulmus minor cultivar 'Ademuz' was cloned from a tree found growing in the eponymous town, in the environs of Valencia, Spain, by researchers at the Escuela Técnica Superior de Ingenieros de Montes, Universidad Politėcnica de Madrid. The tree is one of seven discovered to have a very high resistance to Dutch Elm Disease, on a par with, if not greater than, Sapporo Autumn Gold. In the Madrid study, the appearance of the tree was rated 4.5 / 5, making it the most attractive of the seven new cultivars.
Pests and diseases
In inoculation trials conducted in 2008, 'Ademuz' sustained approximately 10% damage (assumed to be wilting rather than die-back) against a score of c. 45% for the benchmark-resistant clone Sapporo Autumn Gold. In 2009 'Ademuz' scored c. 18%, and Sapporo c. 21%. Ergo, 'Ademuz' would appear to have a level of resistance unprecedented in a European species. However in Italian elm trials, Spanish U. minor clones have...