PORTLAND, Ore. (KOIN) – An invasive insect has caused noticeable damage to Oregon’s white oak trees in 2022, the Oregon Department of Forestry said. The oak lace bug, scientific name Corythucha ...

‘I have some weird, seemingly hollow, green, round balls falling from my oak tree. What in the world are these things?” — S.Y. You are describing an interesting growth that can occur on a variety of ...

Welcome to our tree column, “Ask your local arborist.” Each month, arborists from the Davey Tree Expert Company in Menlo Park discuss a tree-related topic from general care and planting tips to how ...

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 ...

A tiny insect is silently killing California's coast live oaks. First spotted in Ventura County last year, the goldspotted oak borer has already left a trail of dead trees across Southern California, ...

While walking around our property this week, I came across two interesting things going on with our pin oak trees. The first thing that caught my eye was what looked like a white grape growing from an ...

Ron Durbin, who trekked with a group into a rugged Santa Clarita canyon, quickly spotted nearby trees pockmarked with D-shaped “exit holes,” a deadly calling card. This was the work of the goldspotted ...

Agriculture officials in Marin County are alerting property owners and arborists to be on the lookout for a tiny invasive beetle that attacks oak trees, after the insect was detected last month in ...

Most oak tree insects in the larval stage just sit there in oak branches. They have glycerine, a kind of antifreeze that allows them to survive even the harshest winters. In the fall acorns, the seed ...

STRONGSVILLE, Ohio -- Now that the first frost has occurred, it is time to start thinking about pruning oak trees to minimize the spread of oak wilt, a lethal disease affecting oak trees that is ...

Old water oaks (Quercus nigra) are prone to developing decay in their trunks as they age. Because of this, their life ...