This leaf disease has been firmly established in Massachusetts, Rhode Island, and Connecticut and has spread north into New ...

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 ...

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 ...

UC ANR research shows fungi are increasingly causing trees to decline and die. Scientists found 10 woody plant species in six ...

A flowering dogwood tree blooms in a yard. - Mark C Stevens/Getty Images Dogwoods make a stunning addition to any garden. The compact trees are prized for their delicate white blossoms in the spring ...

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 ...

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 now found in Bellingham brings an added concern: It can injure people. A research project using citizen ...