Santa Clarita Valley oak trees are being invaded by the goldspotted oak borer; an insect named for its iridescent black shell with gold spots that burrows underneath the bark of oak trees.

As this liquid flows down the trunk, bark becomes initially stained dark black but eventually ... mulberry, oak, willow and hemlock. Even though the symptoms of this condition may seem unpleasant, the ...

Sometimes characterized by browning or golden leaves at the top of the tree and a dark bluish-gray discoloration in the bark, oak wilt kills thousands of trees each year, and the disease is present in ...

Oak wilt is a fatal tree disease caused by a fungus that affects ... French, University of Minnesota, Bugwood.org. A dark brown to black discoloration on the wood surface may be found when the bark is ...

On this edition of ID That Tree, meet the black locust, which is recognizable by its small, rounded pinnate leaflets; gray bark with rough, long running ridges with orange undertones; and paired ...

A single, very limited attack was found in a severely distressed California black oak. Valley Oak Valley Oak in Calistoga. Photo by Dr. Akif Eskalen, UC Davis Valley Oak trunk. Photo by Curtis Ewing, ...

leaves visible evidence on three species of oak trees common in San Diego County. When their larvae create feeding galleries underneath the surface of the bark, GSOB attacks may be recognized by the ...

The bark is dark gray and blocky, with long running ridges. Shingle oak tends to keep its lower dead limbs attached to the tree. The fruit is a small ... oak is fairly salt tolerant and tolerant of ...