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Last updated on April 17, 2014 at 7:54 EDT

Latest Ulmus americana Stories

2012-07-31 06:22:48

CHICAGO, July 31, 2012 /PRNewswire/ -- Dr. Fredric Miller today announced that his team's survey of the Emerald Ash Borer (EAB) infestation in Chicago has reached a tipping point. The survey conducted in late June of this year confirmed the infestation in all 50 wards and found its progress advanced. Thousands of ash trees that are treatable today will be lost if not treated in the next ten weeks. The emerald ash borer is forcing a decline in tree health whereby the majority of the city's ash...

2012-03-29 22:43:56

Scientists at the University of Guelph have found a way to successfully clone American elm trees that have survived repeated epidemics of their biggest killer – Dutch elm disease. The breakthrough is the first known use of in vitro culture technology to clone buds of mature American elm trees. "This research has the potential to bring back the beloved American elm population to North America," said Prof. Praveen Saxena, a plant scientist who worked on the project with Professor...

2012-03-29 21:27:55

A healthy century old American elm on the campus of the University of Guelph could hold the key to reviving the species that has been decimated by Dutch elm disease (DED). This tree is an example of a small population of mature trees that have resisted the ravages of DED. A study published in the Canadian Journal of Forest Research (CJFR) examines using shoot buds from the tree to develop an in vitro conservation system for American elm trees. "Elm trees naturally live to be several...

2011-03-31 00:48:43

Two U.S. Department of Agriculture (USDA) scientists may have discovered "the map to El Dorado" for the American elm"”a previously hidden population of elms that carry genes for resistance to Dutch elm disease. The disease kills individual branches and eventually the entire tree within one to several years. It has been accepted for 80 years that American elms (Ulmus americana) are tetraploids, trees with four copies of each chromosome. But there have also been persistent but dismissed...