Of these, 45 species were identified as being obligate on ash – unknown from other tree species – and a further 62 species as being highly associated, rarely using other species. This means that not ...

The emerald ash borer (Agrilus planipennis) has plagued native ash trees in Illinois and Iowa since 2006 and 2010, respectively. This pest was first introduced in 2002 around the Detroit area and ...

It is stealthier than Dutch elm; the death of ash trees is slower: there are moments of apparent recovery, but the eventual decline seems irrecoverable.

Dutch elm disease has wiped out the majority of adult elm trees growing along the Mississippi River, robbing them of their role.

The colors of the season are a function of forest health, and we look closely at efforts to restore and protect three iconic tree species: elm, ash, and chestnut.

“The loss of American elm and green ash as viable tree species in the Upper Mississippi River floodplain has had a significant impact on forest composition,” Andy Meier, St. Paul District ...

Ash trees are evolving resistance to a fungus which has decimated the species in recent years, a new study shows. Ash dieback was first seen in the UK in 2012 and there were fears it could lead to up ...

The disease reached the UK's wider environment in October 2012. However, the scientists warned that the species faced another serious threat - the emerald ash borer insect.

Emerald ash borer has yet to make an appearance in Brown County, but the city forestry department is already removing elm trees to control the spread.

Infected chestnut trees were first observed in New York City in 1904. By 1940, chestnuts were wiped out as a commercial species and active component of its original ecosystem.