Is it a fungus, and is it harmful to the tree? The subject of our discussion today may cover some, or a majority, of the tree. It may appear grayish to light green, circular in nature and rather ...

When we see something weird growing on tree bark, it is usually algae, lichens, moss, or fungi (or a combination of these). These can be gray, white, green, or even orange.

That green gunk, it’s called lichens, not mold, not tree rot. Lichens are remarkable, symbiotic organisms that consist of a partnership between a fungus and a photosynthetic partner, often an algae.

However, these incredible trees are threatened by beech scale disease, also called beech bark disease (BBD) — a condition that can lead to significant damage or even kill the infected trees.

Folks sometimes become concerned when they notice strange gray-green patches on the trunk or branches of a tree. Should the growths be removed? Is the plant in trouble?

Use bark, twigs to identify trees. ... Birches and aspens have fungus-made black V-shapes under their ... Shagbark hickory peels in long, hard, thick strips top to bottom. Sycamores have green, ...

Bark beetles may use receptors in their antennae to detect and feast on fungus-infected trees. The Eurasian spruce bark beetle (Ips typographus) – found in Europe, Asia and some parts of Africa ...

One of the trees has about half the bark missing from the trunk and sort of circular looking lesions that ooze sap in the area missing the bark (see the photos I have included). Any advice would ...

A fungus never before seen in California oak trees is threatening the state's coastal live oaks. It causes a condition known as "foamy bark canker disease." ...

Q. My 20-something-old redbud tree has developed lichens on the trunk, which is a first. Do I have a problem and is there anything I should do? I have another one in the yard which doesn’t have ...