A first-of-its-kind report shows more than 100 native species of trees in the lower 48 states are facing the threat of extinction due to invasive insects, diseases and climate change. A sweeping ...

Calonectria leaf blight represents a serious phytopathological challenge affecting Eucalyptus plantations worldwide. This disease is caused by a complex of Calonectria species, with pathogens such as ...

This magnificent tree dominated the Eastern landscape with quick-growing specimens that routinely reached heights of 100 feet ...

A potentially devastating disease epidemic is attacking our region's most common evergreen trees. Colorado, Black Hills and Norway spruce have long been planted in yards and shelterbelts. Most of the ...

Do you have a mature pine tree with bunches of brown needles? It may be suffering from a fungal disease called diplodia tip blight. “Diplodia has become more common due to environmental stress and ...