Winter moth, a native of Europe, was accidently introduced to Nova Scotia in the1960s and to the Pacific Northwest in the1970s. High winter moth populations can completely strip the leaves from many species of hardwood trees, slowing their growth and eventually killing them. Oaks are the preferred hosts. The insect was discovered in Massachusetts in the late 1990s. Since then, it has been found in Connecticut, New Hampshire, New York, Rhode Island, and in coastal counties of Maine.
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