The emerald ash borer has killed acres of ash trees across Michigan since 2002. However, new research suggest the invasive beetle from Asia may have arrived in Michigan even earlier.
Deborah McCullough has a joint appointment in Entomology and Forestry at Michigan State University. She says the emerald ash borer was probably introduced from China, in solid wood packing materials used in containerized shipping.
This segment is supported by Michigan State University's Knight Center for Environmental Journalism. More news about the Great Lakes environment can be found at GreatLakesEcho.org and on Current State every Tuesday as part of our partnership.