But if the leaves start to turn yellow during the tree's normal growth seasons, this is cause for concern. There has been a noticeable death and decline of mature oak trees in the United States ...

Q: We have a sycamore tree that is having a problem leafing out this spring. What can we do to help keep it healthy? A: ...

Black oak is also known as yellow oak, quercitron ... The difference is that red oak trees have more severely lobed leaves and larger acorns. Plus, the inner bark is reddish rather than black ...

Texas A&M Forest Service offers assistance to help Texas landowners stop oak wilt spread through the Texas Oak Wilt Suppression Program.

Rose says bacterial leaf scorch also can cause leaves to turn brown from the margins inward, but “there is usually a yellow ... tree death – somewhat akin to clogging of the arteries in a ...

The long, brownish-yellow leaves of the sumac were complemented ... to avoid being heard by potential predators. A shingle oak tree holds on to all its leaves in Feb. in Lake County.