The state Department of Natural Resources says the trees, commonly known as Bradford pears, may be a popular landscaping tree but they're also a nuisance that can spread.

Megan Abraham is the director of the DNR's Division of Entomology & Plant Pathology. She says that over time the different varieties of the ornamental pear trees have cross-pollinated and that's allowed them "to rapidly spread into our natural resources."

The DNR says the best tree to replace any invasive tree species is one that's native to a particular region, such as serviceberry trees that produce white spring blooms and fruit that attracts wildlife.

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