Insects called the brown marmorated stink bug have been spotted in 12 Michigan counties since the first sighting two years ago, raising concerns among fruit and vegetable growers who worry there's no plan to eradicate the pests. The insects eat a diverse array of crops and have few natural predators, setting them up to be a major threat to Michigan's farmers in the next few years, said Matthew Grieshop, assistant professor of entomology at Michigan State University.

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