The emerald ash borer has shown up in a fifth Iowa county.
The invasive pest was found in a residential tree in the Union County city of Creston. It’s also been discovered in Cedar, Allamakee, Des Moines and Jefferson counties.
The emerald ash borer kills ash trees by burrowing under the bark and eating the layers of the tree. It’s considered to be one of the most destructive tree pests ever seen in North America.
The threat has city leaders in Johnston taking a proactive step to avoid the pest. They’re removing 56 vulnerable ash trees next month.