Duluth, Minn. The cold, damp weather throughout Minnesota has a bright side. It has delayed this year’s expected outbreak of forest tent caterpillars, although the first wave of worms is expected to hatch any day now as long-dormant trees finally sprout

Last year’s largest-ever crop of forest tent caterpillars turned into moths in July and those moths laid lots of eggs. Those eggs have been snug in foam-like egg clusters on tree branches all winter. “It’s pretty well timed so they hatch just as the first aspen leaves come out,” said Mike Albers, forest pest expert […]

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