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Forest tent caterpillars: Pockets of defoliation likely this year, but no regionwide outbreak

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Forest insect experts are starting to see more forest tent caterpillars in northern Minnesota and Wisconsin, but not enough to call it a major outbreak.

In Minnesota, the caterpillars are defoliating trees as far north as Detroit Lakes and the east shore of Lake Mille Lacs. But there are no major signs of egg masses or early defoliation in Northeastern Minnesota.

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