First invasive elm zigzag sawfly detected in Michigan in St. Clair County

The invasive elm zigzag sawfly has been first detected in Michigan's St. Clair County, identified by the U.S. Department of Agriculture's Animal and Plant Health Inspection Service. The Michigan Department of Agriculture and Rural Development states the pest does not pose a significant threat to people, animals, agriculture, or natural resources, as elm trees can recover from defoliation.