A new tree disease has spread in forests in Massachusetts, joining invasive pests and climate change as top priorities for foresters to address. The state has found beech leaf disease in more than 90 ...

Q: I have a beautiful green ash tree in my front yard and hope to keep it protected from the ash borer as long as possible, but today I noticed a lot of leaves have fallen off. There are little dark ...

A tree can look fine from the street and still be under stress. Yellowing leaves, weak growth, split bark, and early leaf ...

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 ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. A group of young cedar trees infected with blight - N. Mitchell/Shutterstock There's nothing quite as majestic and imposing as a ...

Waiting until the leaves drop in fall is a rule of thumb for pruning shade trees, mainly because you can see bare limbs better, and the job is less “messy” without leaves attached to the cut branches.

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

TANNERSVILLE — Marc Wolf steps off a trail at the Mountaintop Arboretum to examine a beech tree with mottled, bumpy bark. “This is pretty typical of beech bark disease,” he said. “Beech trees would ...

Q: I recently noticed a black, tar-like patch on my tree trunk, though it’s not tacky like actual tar. Are these insect eggs? Dried sap? Do I try to scrape it off? The tree has lichen but I don’t ...