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

Getting your Trinity Audio player ready... Dutch elm disease has been reported back in Denver after more than a decade of its absence. The Denver forestry office discovered the disease last month in ...

There is a substance oozing from the trunk of my elm tree. What is this and what should I do to solve this problem? Your tree appears to have slime flux, which is a very common bacterial disease that ...

If you spot tiny holes and piles of sawdust on your tree, bark beetles could be the culprit. Unfortunately, the solution ...

Barren, dead American elm trees along Ogden River are seen from a residence about three miles up Ogden Canyon on Wednesday, Oct. 9, 2019. The line of trees used to have full canopies, providing ...