They're good for the garden, but in northern Minnesota's hardwood forests, earthworms are a regular menace. That's according to University of Minnesota-Duluth researcher Cynthia Hale. She says earthworms are killing tree seedlings by consuming duff. That's the layer of decaying plant matter on the forest floor, which seedlings prefer to grow in. She says there are two things you can look for in a forest bed to determine whether there is an infestation of worms.
Digitization made possible by the State of Minnesota Legacy Amendment’s Arts and Cultural Heritage Fund, approved by voters in 2008.
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