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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of Summer seasonal Tim Dirgins planting an American chestnut hybrid seedling. USDA Forest Service
ID: 806
An American Chestnut Hybrid May Survive in Nature if Properly Situated

A team of scientists from the Forest Service, the Connecticut Agricultural Experiment Station, and the University of Tennessee, Knoxville, is ...

Principal Investigator : Leila Pinchot

Invasive Species2015NRS
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 Hiawatha National Forest personnel work together to set up a test for scale-resistance on a beech tree as part of a training workshop run by FS researchers.  Genetic markers identified in recent studies may allow resistant trees to be selected without using the type of testing shown here, which can take up to a year.
ID: 1214
Finding beech bark disease resistant American beech trees: It’s in the genes!

A Forest Service scientist and her collaborators have identified genetic markers that may help accelerate breeding and production of American be ...

Principal Investigator : Jennifer Koch

Invasive Species2017NRS
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
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 : Charles E. Flower

Invasive Species2017NRS
Photo of Forest Service summer intern Daniel Delatte measuring the height of a planted hybrid American chestnut seedling. Cornelia Pinchot, U.S. Department of Agriculture Forest Service.
ID: 1060
Getting Reacquainted with an Old Friend

Forest Service scientists investigate site factors that will boost success rates in hybrid American chestnut plantings in forests. This will hel ...

Principal Investigator : Leila Pinchot

Invasive Species2016NRS
Photo of Interns put EAB eggs on trees: Summer interns set up bioassay experiment by taping EAB eggs to test trees. USDA Forest Service
ID: 810
Green Ash Trees That Survive Beetle Infestation Pass on Their Resistance Through Propagation and Planting

Among the tens of millions of trees killed by the emerald ash borer (EAB), researchers have found a small number of trees that survived their as ...

Principal Investigator : Jennifer Koch

Invasive Species2015NRS
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 : Charles E. Flower

Invasive Species2017NRS
Photo of Planting American chestnut on a reclaimed mine site on the Wayne National Forest. Hiremath, Forest Service
ID: 317
Novel Ectomycorrhizal Fungus Beneficial for Restoration of the American Chestnut in Reclaimed Mined Sites

A major problem in reforestation efforts on nutrient-poor abandoned mined lands are the survival and establishment of planted seedlings in the h ...

Principal Investigator : Shivanand Hiremath

Invasive Species2011NRS
Photo of Planted American chestnut seedling in a thinning treatment (intermediate light-level treatment) on the Daniel Boone National Forest.
ID: 1245
Reintroducing the American chestnut tree begins with getting the light right

As efforts to breed a blight-resistant American chestnut tree progress, the Forest Service and its partners are researching how to reintroduce t ...

Principal Investigator : Leila Pinchot

Invasive Species2017NRS
Photo of Photo taken with a 40 X dissecting microscope at the Delaware, Ohio, research facility eight weeks after EAB egg hatch in September 2014.  In the center of the light colored tissue is a small dark, oblong-shaped emeral ash borer larva that failed to survive in the ash host tree, a possible indication that the tree may be resistant to the beetle. David W. Carey, USDA Forest Service
ID: 632
Researchers From the U.S. Forest Service and the United Kingdom Join Forces To Save Ash Trees Facing Intercontinental Threats

Ash trees across Europe are currently under attack by a fungal disease known as ash dieback disease, while here in the United States, they are b ...

Principal Investigator : Jennifer Koch

Invasive Species2014NRS
Photo of  Summer research assistants Joe Becker and Andrew Wade help take care of the thousands of ash trees and seedlings that are part of the breeding program at the Northern Research Station in Delaware, OH. Jennifer Koch, U.S. Department of Agriculture Forest Service.
ID: 968
The Key to Rescuing Green Ash from Emerald Ash Borer is in the Genes

Hundreds of genes in lingering ash trees have been identified that may help researchers understand the defense responses they use to defend them ...

Principal Investigator : Jennifer Koch

Invasive Species2016NRS