Discover why the mighty Oak Tree was officially designated as the National Tree of the U.S. in 2004, symbolizing strength, ...

The next potential threat facing Niagara County’s trees could make the jump from across the border. Trees in Canada’s Niagara Region have been infected with oak wilt, a fungal disease that means ...

Oak tree leaf loss — specifically with white, pin, English and red oaks — has its own fall leaf story to tell. In a nutshell, these oaks, along with beech and hornbeam trees, ...

Among the most alarming are Bacterial Leaf Scorch (BLS) and Oak Wilt, both of which can kill oak trees. “Most of the time, oak wilt is vectored or carried from tree to tree by insects. So it’s ...

The other gall I found, which was on a different tree, was an oak leaf pocket gall. This gall is produced by a one-eight-inch-long fly, or midge, called Macrodiplesis quercusoroca.

Treehugger/ Alexandra Cristina Nakamura. Besides its branches, roots, and leaves, a mature tree also grows another important structure—the flower (or cone, in the case of evergreens).

They’e been there for over a century, but now residents worried about trees along Kildare Road in Newlands, as some are reportedly posing a risk to traffic and nearby properties. A resident, who ...

The new research centred on 180-year-old English oak trees Older trees are able to accelerate their rates of absorbing planet-warming emissions, scientists at the University of Birmingham have ...

The English oak, for instance, that's going to really struggle. It needs a lot of moisture. We've done lots of tests on this tree now, and we know it's drought sensitive." ...

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 ...

A Casey Trees worker measured the the circumference of the Northampton Oak last summer. Photograph by Evy Mages . That said, the Northampton Oak did have its moment of arboreal glory in 2006 when the ...