Fir trees in Oregon and Washington died in record-breaking numbers in 2022, according to as-yet unpublished research conducted by the U.S. Forest Service.

Fir waves have been found to occur only in the northern Appalachians and in the mountains of northern Japan. These slow motion waves include dieback of canopy trees plus new seedlings that ...

By Vania Turner KALAVRYTA, Greece (Reuters) -On the wooded slopes surrounding the village of Kalavryta in southwestern Greece ...

“Douglas fir mortality in southwestern Oregon occurs during and after drought on hot, dry, harsh sites that no longer provide enough water for the trees,” said OSU’s Max Bennett, who led the ...

Unlike other bark beetles, the Douglas fir variety go for larger trees, 8 inches in diameter and bigger. In normal conditions, or at least what used to be normal wet conditions in Colorado, the ...

More than one million acres of forested land in Oregon contained dead or dying fir trees, indicated by red needles atop their canopies in this photo taken in July 2022 during an aerial survey ...

Forest Service Discovers Mass Fir Tree Die-Off in Oregon An aerial survey from the U.S. Forest Service found huge patches of brown trees amid ongoing drought.

Replacement fir trees sit in crates on Bellagio property, apparently for being planted or re-potted in time for Christmas. The iconic Bellagio trees were removed this summer for improved Formula ...

German researchers are studying using an overhead solar PV system, designed to be removable and reusable, as a sunshade for young fir trees. The pilot, located at a quartz sand excavation site ...

Amid a years-long drought and insect infestation, Douglas fir have entered what scientists are calling a “decline spiral” in southwest Oregon. A study by Oregon State University faculty ...