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Restoring the American Elm |
| Section: NATURAL SCIENCE / AT THE EDGE |
| Author: Hank Becker |
| Publication: The world & I online |
| Issue Date: 2/1/1997 |
| Size: 1,722 Words, 11,264 Characters |
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Alden Townsend has been on a quest for the last 20 years--a quest to find and develop disease-tolerant American elms and return these prized trees to U.S. towns, yards, and landscapes.
"American elms have been the nation's main urban landscape tree," says Townsend. "Just about every city and town has an Elm Street. American elms were planted everywhere until the early 1940s, when Dutch elm disease spread rapidly."
Townsend is an Agricultural Research Service plant geneticist at the U.S. National Arboretum's Glenn Dale, Maryland, laboratory. He says that USDA scientists began screening elm trees for Dutch elm disease (DED) tolerance in 1937.
Shipments of elm tree logs from France to Cleveland, Ohio, accidentally introduced the fungus into the United States in 1931. Within four to f...
. . .
...ptable in plant hardiness zones 5 through 7. New Harmony has grown well in Georgia, Maryland, Minnesota, New Jersey, Ohio, Oklahoma, Pennsylvania, and Tennessee. It is also adaptable in zones 5 to 7, with possible cold hardiness into zone 4.
With such a broad range of adaptability, these new American elms may one day stand tall along city streets that had lost their elms a century earlier.
(818 of 11,264 characters)
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