Fall is usually when people pay attention to trees to see the changing leaf colors. But homeowners should be paying closer attention to their oak trees. Robert Spartz, district manager for the Davey ...

It’s less than a half-inch long but it can fell a giant oak tree in no time. The goldspotted oak borer, GSOB or Agrilus auroguttatus, is a 0.4-inch bullet-shaped beetle with six golden spots on its ...

SANTA ROSA -- An invasive pest has been found in oak trees in a west Santa Rosa neighborhood that has officials and tree experts sounding an alarm. While the number of dying, infected trees is on the ...

Two new pests in the Willamette Valley could decimate trees and worsen the ‘urban heat island’ effect that makes some neighborhoods hotter than others For years, Portland area politicians have ...

The Mediterranean oak borer, a miniscule beetle no bigger than a sesame seed, has been discovered in trees around the Portland area. The invasive pest native to Europe, the Middle East and North ...

An Inland Empire city has approved a development project 450 feet away from the third oldest known living organism in the world — a sprawling, shrub-like oak tree that is more than 13,000 years old.