MADISON, Wis. - The Wisconsin Department of Natural Resources is asking the public to check needle-bearing trees for signs of a harmful disease and report their findings to the department.

As the world warms, a new study is helping scientists understand how cone-bearing trees like pines and junipers may respond to drought. The research addresses a classic question in the field: When ...

Within conifers, active abscission of complete penultimate branch systems is not common and has been described mainly from juveniles. Here I present evidence for the abscission of penultimate branch ...

Conifers, such as pines, spruces, and firs, produce sticky resins that protect the trees from insects and pathogens.

Spring has sprung and gardeners are digging in. Got questions as you carry on? Get answers from Ask an Expert, an online question-and-answer tool from Oregon State University’s Extension Service. OSU ...