Just outside Cottage Grove at the U.S. Department of Agriculture’s Dorena Research Center, scientists are playing a numbers ...

An invasive, tree-killing pest has made its way to Portland, spelling trouble for the many native ash trees that cool ...

The emerald ash borer has made its way to Portland, posing a threat to 100,000 ash trees in the city, and the Oregon ...

The city of Portland is launching a major expansion of its citywide tree planting and tree care efforts, including restarting its relationship with the well-known nonprofit Friends of Trees. The ...

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 ...

Over the summer, a private arborist noticed an ailing green ash tree at the David Douglas Aquatics Center near Hazelwood-Mill Park. City and state officials caught an adult beetle at the tree, and the ...

According to Urban Forestry, current code requires property owners to plant a 1.5-inch caliper broadleaf tree or 5-foot-tall ...

A tiny green beetle that can have a devasting impact on ash trees has been found in new sites in northwest Oregon, according ...

The Portland Fruit Tree Project harvests fruit from trees in Portland neighborhoods and delivers it to local food pantries ...

PORTLAND, Ore. — The PNW and Portland metro were buffeted by strong winds and stormy weather Wednesday night, and by early Thursday morning over 20,000 households were left without power due to downed ...