About 95,000 ash trees live in Portland, and most of them could become infected and die in the next few years with the recent arrival of the emerald ash borer, an invasive, tree-killing pest that’s ...

You’re walking along White Rock Creek, surrounded by the dense canopy of green. In that canopy, you see the majestic ash ...

A tiny beetle known for decimating ash trees throughout North America and Europe has been discovered for the first time in Portland and has spread to new sites in several other counties where the ...

In 2009, an invasive tree pest was discovered on an ash tree in St. Paul. This past fall, 15 years later, the city cut down its last ash tree. While St. Paul and other more populated cities have been ...

This non-native beetle kills ash trees by feeding on the layer beneath the bark, cutting off water and nutrients. Approximately one-third of the trees in Fort Collins are ash trees, making the city's ...

The insect threatens the health and survival of the black ash tree. In northern Wisconsin, April Stone is carrying on a centuries-old Ojibwe practice of basket making. She uses wood from the black ash ...

James E. Zablotny/USDA APHIS This week, crews removed dozens of infested ash trees in Forest Grove as part of a state plan to slow the spread of the destructive pest. This month, state agencies ...

Along the St. Louis River, more than 60,000 trees will be planted to replace dead ash trees and protect the estuary. With dead ash trees all around, Nathan Wagner, of Janesville, Wis., a member of ...

TRAVERSE CITY — Hikers, property owners and others who frequent natural areas this fall have the opportunity to help restore a vanishing native tree species. The great die-off of millions of ash trees ...

TOWN OF ERIN -- The thousands of ash trees killed by the emerald ash borer across southern and central Wisconsin have not only become an eyesore, the trees that are still standing have become ...

Evie has an ash tree in her yard that she’s hoping to save from the emerald ash borer. Evie has an ash tree in her yard that she’s hoping to save from the emerald ash borer. A Certified Arborist from ...