MINNEAPOLIS — Minnesota's warm winter has hurt the fight to control invasive species that attack trees and plants. Common invasive insects we see each year cannot survive typical Minnesota winters.

Scientists at the University of Minnesota published a study in the journal Forests in November 2025 about the potential for fungi to slow the spread of emerald ash borer, a beetle that kills ash trees ...

The eastern spruce budworm is a native insect that munches on balsam fir, leaving some 1,100 square miles of trees defoliated or dead last year, the most in the region since 1961. A spruce budworm and ...

As the world warms, trees in such forests will no longer be adapted to their local climates. That’s where assisted migration comes in John H. Tibbetts, Knowable Magazine On a brisk September morning, ...