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 ...

An invasive pest that kills oak trees continues to spread through the Willamette Valley between Portland and Salem. Oregon officials completed a two-year study this summer that found the Mediterranean ...

Gardening season is underway, and you may have questions. To ask one, simply go to the OSU Extension website, type it in and include the county where you live. A photo is very helpful. Q: Our oak tree ...

For the past two decades, an inconspicuous nature preserve in the Columbia River Gorge has protected rare plants, Oregon white oaks and animals imperiled by rapidly disappearing habitats. Now, the ...