| 词条 | Ulmus parvifolia 'King's Choice' | ||
| 释义 |
| name = Ulmus parvifolia 'King's Choice' | species = Ulmus parvifolia | cultivar = 'King's Choice' | origin = Maryland, USA | image = Ulmus parvifolia Kings choice tree.jpg }} The Chinese Elm cultivar Ulmus parvifolia 'King's Choice' is one of the early American selections best known for its winter hardiness, able to withstand temperatures of -30 deg. Celsius. 'King's Choice' was patented in 1985. DescriptionBushy in shape, its leaves turn yellow in autumn, but the cultivar lacks the attractive mottled bark for which the species is renowned.[1][2] Pests and diseasesThe species and its cultivars are highly resistant, but not immune, to Dutch elm disease, and unaffected by the Elm Leaf Beetle Xanthogaleruca luteola.[3] CultivationThe tree featured in the elm trials conducted by Northern Arizona University at Holbrook, eastern Arizona. 'King's Choice' is not known to be in cultivation in Europe or Australasia. EtymologyThe tree was named for Benjamin J. King, who made the original selection at King's Men Tree Farms, Hampstead, Maryland. AccessionsNorth America
References1. ^HortScience, Vol. 26: 290-292 (1991). {{Elm species, varieties, hybrids, hybrid cultivars and species cultivars |state=collapsed}}{{Ulmaceae-stub}}2. ^{{cite journal |last1=Santamour |first1=Frank S. |last2=Bentz |first2= Susan E. |date=May 1995 |title=Updated Checklist of Elm (Ulmus) Cultivars for use in North America|url=http://joa.isa-arbor.com/request.asp?JournalID=1&ArticleID=2673&Type=2|journal=Journal of Arboriculture |volume=21 |number=3|pages=122–131 |access-date=20 June 2016}} 3. ^{{Cite web|url=http://www.sunshinenursery.com/survey.htm|access-date=17 July 2017|archiveurl=https://web.archive.org/web/20110719132152/http://www.sunshinenursery.com/survey.htm|title=Elm Leaf Beetle Survey|archive-date=2011-07-19}} 3 : Chinese elm cultivar|Ulmus articles with images|Ulmus |
||
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。