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The starting-points for List of elm cultivars, hybrids and hybrid cultivars were fourfold: (1) Green's 'Registration of Cultivar Names in Ulmus ' (1964), [1] based on the contemporary nomenclature of elm species and wild hybrids; (2) Krüssmann's confirmation or correction of cultivar-names in his monumental Handbuch der Laubgehölze (1976); [2] (3) Heybroek's table of Netherlands research ...
Trees and shrubs hardy in Great ... C. M. (1996). New horizons in Dutch elm disease control. Pages 20–28 in: Report on ... "Elms resistant to Dutch elm disease" ...
A 300-year-old example growing in Grenzhammer, Ilmenau has allegedly been scientifically proven to be resistant to Dutch elm disease. [25] The Swedish Forest Tree Breeding Association at Källstorp produced triploid and tetraploid forms of the tree, but these proved no more resistant to Dutch elm disease than the normal diploid form. [26]
'Plantyn' is no more resistant to Dutch elm disease than its Dutch contemporaries 'Dodoens' and 'Lobel' according to one source, rating 4 out of 5. [5] However, research published in France by the Institut National de la Recherche Agronomique (INRA) indicated that 'Plantyn' possesses a greater degree of disease resistance than the other two cultivars, although neither had actually been tested ...
The tree succumbed to Dutch elm disease and was felled in 1968. A ring count established that it had begun life in the year 1701. [61] The "Great Elm Tree" at Phillips Academy in Andover, Massachusetts is believed to have been standing for at least 200 years. It is being well cared for and receives regular treatments for Dutch elm disease. [62]
Printable version; In other projects ... The species and its cultivars are highly resistant, but not immune, to Dutch elm disease, ...
With a girth of 6.9 m (22.6 ft) and a height of 40 metres (130 ft), the Ulmus × hollandica hybrid elm on Great Saling Green, Great Saling, near Braintree, Essex, reckoned at least 350 years old, [25] was reputedly the largest elm in England, before succumbing to Dutch Elm Disease in the 1980s; [26] Elwes and Henry (1913) misidentified it as U ...
Ulmus 'Frontier' is an American hybrid cultivar, a United States National Arboretum introduction (NA 55393) derived from a crossing of the European Field Elm Ulmus minor (female parent) with the Chinese Elm Ulmus parvifolia in 1971. Released in 1990, the tree is a rare example of the hybridization of spring- and autumn-flowering elms.
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