Search results
Results from the WOW.Com Content Network
Ulmus parvifolia 'Emer II ' or ' Emerald Vase ' (selling name Allee) is a Chinese Elm cultivar selected by Dr. Michael A. Dirr and cloned in the late 1980s from a tree planted circa 1910 on the University of Georgia campus at Athens, that had survived ice-storms undamaged. [1] [2] It was patented in 1991. [3]
Ulmus parvifolia, commonly known as the Chinese elm [2] or lacebark elm, is a species native to eastern Asia, including China, India, Japan, Korea, Vietnam, [3] Siberia and Kazakhstan. [4] It has been described as "one of the most splendid elms, having the poise of a graceful Nothofagus". [5] Chinese elm as bonsai during spring growing season.
Emerald Sunshine is resistant to Dutch elm disease and Elm Yellows (Phloem necrosis). Foliage of trees under assessment at the aforementioned National elm trial site at U C Davis suffered minimal damage caused by the elm leaf beetle Xanthogaleruca luteola, [3] whilst damage caused by Japanese Beetle in trials at the University of Kentucky was found to be slight, owing to the dense pubescence ...
Dutch elm disease (DED) is caused by a member of the sac fungi (Ascomycota) affecting elm trees, and is spread by elm bark beetles. Believed to be originally native to Asia, the disease was accidentally introduced into America, Europe, and New Zealand. In these regions it has devastated native populations of elms that did not have resistance to ...
This article is a list of diseases of elms (Ulmus spp.). Bacterial diseases ... diseases; Elm mosaic 'Elm mosaic virus' Elm mottle Elm mottle virus: Elm stripe ...
Elm yellows is a plant disease of elm trees that is spread by leafhoppers or by root grafts. [1] Elm yellows, also known as elm phloem necrosis, is very aggressive, with no known cure. Elm yellows occurs in the eastern United States, and southern Ontario in Canada. It is caused by phytoplasmas which infect the phloem (inner bark) of the tree. [2]
American elm is a vase-shaped, medium to large, deciduous tree. [4] 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 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.