The symptoms were strange. They were the same across multiple oak species—white, swamp white, black, red, post, shingle, ...

OAK GLEN, Calif. (KABC) -- Pests are causing devastation to trees across California. And that includes an area of the Inland Empire named after its centuries-old oaks. The day after Christmas, Oak ...

BIG BEAR LAKE (CBSLA) — An invasive pest that has infested and killed oak trees across California has been detected in the unincorporated San Bernardino County community of Sugarloaf. The goldspotted ...

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 ...

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 ...

Q: The leaves on my newly planted oak tree have numerous holes, and the edges of the leaf are missing. I do not see any insects, but I am worried about the tree. Most of the tree is like this. A: Oaks ...

An invasive insect from Europe and the Middle East is attacking several Oregon white oak trees in the Wilsonville area, and state researchers say it's been found in other pest traps in the past few ...

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 ...

Our native oak trees face a new threat. In November 2019, scientists in Calistoga discovered tiny symbionts — an insect-fungus team — killing mature valley oak trees (Quercus lobata). It was the first ...

You’re admiring the stalwart limbs and sculpted leaves of your handsome oak tree, and suddenly you see them: warty bulges clustered along the branches like bunches of freaky grapes. There’s no need to ...

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 ...