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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of American elm cuttings growing in the greenhouse. Kathleen Knight, U.S. Department of Agriculture Forest Service.
ID: 995
Elm Disease Resistance Research Gets a Boost

Great news for disease-tolerant American elm! A grant from The Manton Foundation has provided the Forest Service’s Northern Research Station w ...

Principal Investigator : Jim Slavicek

Resource Management and Use2016NRS
Photo of
ID: 198
Expansion of the American Elm Restoration Project in New England in Collaboration With The Nature Conservancy

The American elm in hardwood forests and riparian ecosystems has been greatly reduced or eliminated by Dutch elm disease (DED) and has not been ...

Principal Investigator : Jim Slavicek

Invasive Species2010NRS
Photo of Photo (1) USDA employee inoculating an American elm tree with the Dutch elm disease fungal pathogens. 
 
Photo (2) Healthy American elm tree (left) and a tree that has succumb to DED (right).
ID: 1265
Forest Service moves American elm tree a big step closer to landscape restoration

Over the past several decades, mature American elm trees have virtually disappeared from city streets and eastern forests as a result of Dutch e ...

Principal Investigator : Jim Slavicek

Water, Air, and Soil
Resource Management and Use
Invasive Species
2017NRS
Photo of NRS-2017-62????
ID: 1254
Forest Service scientists develop a cold-hardy American elm tree

Dutch elm disease largely eradicated mature elm trees from the eastern U.S. in the 1900s. Forest Service scientists are working to create site-a ...

Principal Investigator : Jim Slavicek

Invasive Species2017NRS
Photo of 1: Two American elm trees tree on left healthy with dark green foliage while tree on right is diseased and exhibiting light yellow foliage.  
 
2: Variability in American elm leaf color associated with infection by Candidatus. Phytoplasma trifolii  with leaves on left collected from an infected tree while leaves on right were collected from a healthy tree.
ID: 1255
Identification of a clover proliferation group phytoplasma as the probable cause of American elm Ttee mortality

Forest Service scientists observed premature canopy decline symptoms in elm trees within their research plantations in midsummer 2016. They attr ...

Principal Investigator : Jim Slavicek

Invasive Species2017NRS