Lichens survive in a very wide range of habitats worldwide. Amazingly, more than 400 species can be found in Maryland.

Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of Service and Privacy Policy. Conifer forests across Europe are under siege from a tiny threat ...

Bark beetles moving between trees routinely carry two fungi that are responsible for the Dutch elm tree disease outbreak.

If you've started sneezing and coughing after bringing home a Christmas tree, you're not alone. Allergists have been seeing more patients come in with allergy symptoms recently. They're calling it ...

As Colorado experiences its signature whiplash weather, arborists are warning that stressed trees are more vulnerable to pests and diseases. Peel back the bark, and you may find a predator in your ...

The list of diseases attacking trees in the Pacific Northwest grows every year. A pathogen new to Pierce County brings an added concern: It can injure people. A research project using citizen ...

The blackish trunks on the crapemyrtles around town are caused by an insect known as crapemyrtle bark scale. It doesn’t kill the trees, but it does make them unsightly and less vigorous. This scale is ...

The list of diseases attacking trees in the Pacific Northwest grows every year. A pathogen now found in Bellingham brings an added concern: It can injure people. A research project using citizen ...

Q: We have a problem with our lone Japanese Maple tree in our front flower bed. We think it has a fungus, and we're not really sure if we can do anything to save it. We noticed it a couple of months ...

Q: I recently purchased a home with several mature navel orange trees. 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 ...