The balsam woolly adelgid, a tiny nonnative flightless insect, is spreading across the American West killing subalpine fir in northern Utah's recreation-heavy mountain ranges and canyons. Rsearchers ...

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SEATAC -- The dwarf subalpine fir was moved from a doomed garden with the care approaching a human organ transplant: Detailed plans were first drawn up, then teams of educated specialists toiled for a ...

A nonnative tree-killing insect is invading northern Utah, attacking subalpine fir and potentially triggering yet another die-off of the region’s long-stressed conifer forests. Introduced from central ...