|
National Elm Trial
The National Elm Trial was an American volunteer effort to evaluate a range of newly developed elm cultivars as replacements for elms destroyed by Dutch elm disease. The Colorado State University College of Agricultural Sciences coordinated the trial.(1) .(2) The trial began in 2005, but was restricted to elm cultivars commercially available in the United States, unlike the trial conducted by Iowa State University in the 1970s which included the most recent European developments. The trial was conducted for 10 years, with annual assessments of each tree for height, diameter, crown characteristics, and fall color, as well as response to vascular diseases, canker diseases, foliar diseases, insect infestations, bark beetle infestations, and abiotic damages. Stated goals of the trial were as follows: * Determine the growth and horticultural performance of commercially available elm cultivars resistant to Dutch elm disease in various climate regimes in the United States. * Determine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utah State University
Utah State University (USU or Utah State) is a public university, public land grant colleges, land-grant research university with its main campus in Logan, Utah, United States. Founded in 1888 under the Morrill Land-Grant Acts as Utah's federal land-grant institution, Utah State serves as one of Utah's two flagship universities. It is Carnegie Classification of Institutions of Higher Education, classified among "R1: Doctoral Universities – Very high research activity". The Logan campus is the state's largest public residential campus, with more than 84% of students living away from home. As of fall 2023, Utah State had 28,063 enrolled students, including 20,259 at its main Logan campus. The university has a presence statewide, with a total of 30 statewide campuses and more than 50 research institutes and centers. Among these research institutes is the Space Dynamics Laboratory (SDL), which is the sole University Affiliated Research Center (UARC) for the Missile Defense Agency, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Parvifolia 'BSNUPF'
''Ulmus parvifolia'' 'BSNUPF (selling name ) is a Chinese Elm cultivar A cultivar is a kind of Horticulture, cultivated plant that people have selected for desired phenotypic trait, traits and which retains those traits when Plant propagation, propagated. Methods used to propagate cultivars include division, root a ..., cloned from a chance seedling at Bold Spring Nursery, Bold Springs, Georgia, Bold Spring, Georgia. Patented in 2007, it was raised by John Barbour of Athena Trees, Monroe, Georgia, Monroe, Georgia, USA, Georgia. Description is distinguished by its fastigiate form, growing tall by only wide, with leaves larger and darker than the typ Pests and diseases The species and its cultivars are highly resistant, but not immune, to Dutch elm disease, and completely unaffected by the Elm Leaf Beetle ''Xanthogaleruca luteola''. Damage caused by the Japanese Beetle is relatively slight.Brady, C., Condra, J., & Potter, D. (2008) Resistance of Landscape-suitable Elm (Ulmus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Parvifolia
''Ulmus parvifolia'', commonly known as the Chinese elm or lacebark elm, is a species native to eastern Asia, including China, India, Japan, Korea, Vietnam,Fu, L., Xin, Y. & Whittemore, A. (2002)Ulmaceae in Wu, Z. & Raven, P. (eds) ''Flora of China'', Vol. 5 (Ulmaceae through Basellaceae). Science Press, Beijing, and Missouri Botanical Garden Press, St. Louis, USA; also available as Siberia, and Kazakhstan. It has been described as "one of the most splendid elms, having the poise of a graceful ''Nothofagus''".''Hilliers' Manual of Trees & Shrubs'', 4th edition, 1977, David & Charles, Newton Abbot, England Description A small to medium deciduous or semideciduous (rarely semievergreen) tree, it grows to tall and wide, with a slender trunk and crown. The leathery, lustrous green, single-toothed leaves are small, 2–5 cm long by 1–3 cm broad, and often are retained as late as December or even January in Europe and North America. In some years, the leaves take on a pu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Forest Service
The United States Forest Service (USFS) is an agency within the United States Department of Agriculture, U.S. Department of Agriculture. It administers the nation's 154 United States National Forest, national forests and 20 United States National Grassland, national grasslands covering of land. The major divisions of the agency are the Chief's Office, National Forest System, State and Private Forestry, Business Operations, as well as Research and Development. The agency manages about 25% of federal lands and is the sole major national land management agency not part of the United States Department of the Interior, U.S. Department of the Interior (which manages the National Park Service, the U.S. Fish and Wildlife Service and the Bureau of Land Management). History In 1876, Congress formed the office of Special Agent in the Department of Agriculture to assess the quality and conditions of forests in the United States. Franklin B. Hough was appointed the head of the office. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Department Of Agriculture
The United States Department of Agriculture (USDA) is an executive department of the United States federal government that aims to meet the needs of commercial farming and livestock food production, promotes agricultural trade and production, works to assure food safety, protects natural resources, fosters rural communities and works to end hunger in the United States and internationally. It is headed by the secretary of agriculture, who reports directly to the president of the United States and is a member of the president's Cabinet. The current secretary is Brooke Rollins, who has served since February 13, 2025. Approximately 71% of the USDA's $213 billion budget goes towards nutrition assistance programs administered by the Food and Nutrition Service (FNS). The largest component of the FNS budget is the Supplemental Nutrition Assistance Program (formerly known as the 'Food Stamp' program), which is the cornerstone of USDA's nutrition assistance. The United Stat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Americana 'Jefferson'
The American Elm cultivar ''Ulmus americana'' 'Jefferson' was cloned from a tree growing near a path in front of the Freer Gallery of Art, close to the Smithsonian Institution Building ("The Castle") on the National Mall in Washington, D.C.(1) .(2) .(3Sherald, 2009, pp. 37—38./ref> The United States National Park Service, which had planted the tree during the 1930s, cloned it in 1993 after screening tests showed that it possessed an outstanding level of tolerance to Dutch elm disease (DED). In 2005, the Park Service and the Agricultural Research Service (ARS) of the United States Department of Agriculture jointly released the clone (formerly NPS 3–487) to the nursery trade as 'Jefferson'. The parent tree appears to have remained unscathed by DED in 2014. Description 'Jefferson' is distinguished by its low, spreading form with arching limbs and broad U-shaped crotches. The parent tree on the National Mall has reached a height of about after 80 years. Ploidy: ''2n'' = 42. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Americana 'Lewis & Clark'
The American elm cultivar ''Ulmus americana'' 'Lewis & Clark' (trade name ) is a development from the North Dakota State University (NDSU) Research Foundation breeding programme, released in 2004 to commemorate the 200th anniversary of the eponymous expedition. The cultivar was cloned from a tree discovered in 1994 along the Wild Rice River south west of Fargo, North Dakota, where all those around it had succumbed to Dutch elm disease; the tree remains in perfect health (2008). proved only moderately successful in the US National Elm Trial, averaging a survival rate of 62.6% overall, potentially due to environmental factors rather than susceptibility to Dutch elm disease. Nevertheless, is considered the hardiest of the American Elm cultivars, able to survive in Zone 3 (-40 to -34 Celsius). West, T. P. (2022) ''Elms, the Good, the Bad and the Ugly''. NDSU North Dakota Agricultural Experiment Station/ref> was introduced to the UK in 2008 by Hampshire & Isle of Wight Bran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Americana 'Princeton'
The American Elm cultivar ''Ulmus americana'' 'Princeton' was originally selected in 1922 by New Jersey nurseryman William Flemer of Princeton Nurseries for its aesthetic merit. 'Princeton' was later found to have a moderate resistance to Dutch elm disease (DED). Description American elm is a vase-shaped, medium to large, deciduous tree. The tree can grow to greater than 30 m in height, and is distinguished by its dense, symmetrical, upright form and dark green foliage, ultimately forming a broad umbrella crown. Crotch angles can be acute, with considerable bark inclusion which can later lead to branch breakages. The leaves are less than 16 cm long by 8 cm broad. 'Princeton' grows quickly, young trees increasing in height by over 1.6 m per annum (d.b.h. by 2.8 cm p.a.) in an assessment at U C Davis as part of the National Elm Trial.McPherson, G. ''et al''. (2008). National elm trial: Initial report from Northern California. ''Western Arborist'', Fall 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Americana 'New Harmony'
The American elm cultivar ''Ulmus americana'' 'New Harmony' was raised by the Maryland Agricultural Research Service and released by the United States National Arboretum in 1995, along with 'Valley Forge'. 'New Harmony' proved the most successful ''U. americana'' cultivar in the US National Elm Trial, averaging a survival rate of 85.5% overall. Description 'New Harmony' is considered by some to have a more desirable form than 'Valley Forge' as it grows vertically on its own with a minimum of early training. The original parent tree (located on a roadside in Ohio) is already over 20 m high, with a slightly greater crown spread. The bole divides into several erect branches about 10 m above the ground terminating in slender, pendulous branchlets.Townsend, A. M., Bentz, S. E., and Douglass L. W. (2005)Evaluation of 19 American Elm Clones for Tolerance to Dutch Elm Disease. ''Journal of Environmental Horticulture'', March 2005, Horticultural Research Institute, Washington ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Americana 'Valley Forge'
The American Elm cultivar ''Ulmus americana'' 'Valley Forge' was raised by the Agricultural Research Service in Maryland. The tree was released to wholesale nurseries without patent restrictions by the U. S. National Arboretum in 1995 after proving to have a high resistance to Dutch elm disease. 'Valley Forge' proved only moderately successful in the US National Elm Trial, averaging a survival rate of 66.7% overall, owing largely to environmental factors rather than susceptibility to disease. Description The branching is typically upright and arching, creating a broad vase-shaped structure complemented by a dense canopy of leaves. However, Michael A. Dirr, Professor of Horticulture at the University of Georgia criticized the tree's form as 'floppy'. The bark features greyish, flat-topped ridges, separated by roughly diamond-shaped fissures. The dark green leaves are large, Washington, D.C., US. Acc. nos. 76510, 68983. Europe *Grange Farm Arboretum, Sutton St James, Spalding, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Americana
''Ulmus americana'', generally known as the American elm or, less commonly, as the white elm or water elm, is a species of elm native to eastern North America. The trees can live for several hundred years. It is a very Hardiness (plants), hardy species that can withstand low winter temperatures, but it is affected by Dutch elm disease. The wood was seldom utilized until the advent of mechanical sawing. It is the state tree of Massachusetts and North Dakota. Description The American elm is a deciduous tree which, under ideal conditions, can grow to heights of . The trunk may have a diameter at breast height (dbh) of more than , supporting a high, spreading umbrella-like canopy. The leaves are alternate, long, with double-serrate margins and an oblique base. The leaves turn yellow in the fall. The perfect flowers are small, purple-brown and, being wind-pollinated, apetalous. The flowers are also protogynous, the female parts maturing before the male, thus reducing, but not elimi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
