There is surely no shortage of Christmas trees in Oregon. Oregon is the largest producer of Christmas trees in the United States, harvesting around 4 million trees annually, according to World ...

And today, I think it’s much more relevant to us as we sit in this room today,” said Jim Gersbach, an Oregon Community Trees board member and spokesman for the state forestry department.

This year, tree health specialists expected to see some mortality in Oregon following the state's recent droughts, but many were still shocked by the sheer number of trees that fell ill.

The outline of the giant fungus ... associate professor of integratedforest protection at Oregon State University and an expert inArmillaria. Dead Trees Reveal Fungus Until now, the largest ...

Drought-stricken Oregon saw a historic die-off of fir trees in 2022 that left hillsides once lush with green conifers dotted with patches of red, dead trees. The damage to fir trees was so ...

Drought-stricken Oregon saw a historic die-off of fir trees in 2022 that left hillsides dotted with patches of red, dead trees. Evergreen conifers are less able to survive in drought conditions ...

Before the Willamette Valley was dominated by agriculture, it was dominated by savannahs of madrone, ponderosa pine and Oregon white oak. The trees still play an important role in the valley.

Researchers also hope to identify and breed Oregon ash trees resistant to the pest. TANGENT, Ore. — The Calapooia River flows past fields of bucolic farmland in the Mid-Willamette Valley where ...

PORTLAND, Ore. (KOIN) — An invasive insect from Europe and the Middle East that attacks oak trees has recently been found in several Oregon white oaks in Wilsonville. The Mediterranean oak borer ...