The Mediterranean oak borer, an invasive beetle known to transmit a sometimes fatal fungus to Oregon white oak trees, has been found in Marion and Polk counties. Summer trappings also showed that the ...

SALEM, Ore. (KTVZ) – A new report on the state of health of Oregon’s forests shows that drought, insect pests and tree diseases continue to be the biggest threats to the state’s trees. The report is ...

PORTLAND, Ore. — On Friday, the Oregon Department of Forestry launched its annual aerial survey of forests throughout the state, something the agency has done since 1947. Over the next few months, ...

Drought and insects have killed an unprecedented number of Oregon’s Douglas fir trees during the last decade, costing billions in timber value, damaging infrastructure and ramping up wildfire danger.

Bark beetles are dark flying insects about the size of a grain of rice that leave tiny holes in the bark and branches of trees. Their very small grubs feed voraciously on the inner bark of trees that ...

Eastern Oregon's Malheur National Forest boasts some of the state's oldest trees, including pine and larch that live more than 500 years. But many of those ancient trees are dying at an alarming rate, ...

A small beetle is responsible for the death and decline of billions of ash trees in North America, and the race is on to stop it from causing further damage. The USDA is hoping to spread the word so ...

PORTLAND, Ore. (KOIN) — Older trees in an Eastern Oregon forest are perishing “at an alarming rate,” according to researchers. A new study led by James Johnston, an assistant research professor for ...

Eastern Oregon’s Malheur National Forest boasts some of the state’s oldest trees, including pine and larch that live more than 500 years. But many of those ancient trees are dying at an alarming rate, ...