The destructive emerald ash borer has been confirmed in southern Cedar Rapids IA. The emerald ash borer was discovered at an Iowa interstate rest area along I-380 approximately one-half mile north of the Johnson County line. There are now 29 counties in Iowa confirmed positive with this invasive pest. EAB has spread to 25 states, destroying tens of millions of ash trees.
Read more about this most recent discovery and confirmations of infestation in the Iowa State University Extension and Outreach Yard & Garden news release from October 19, 2015.
The map below shows the current confirmed reports of EAB in Iowa. The circles around each confirmed infestation indicate a 15-mile radius, an area where ash trees are at risk of attack and it is suggested that homeowners decide which management option they will use to deal with the threat of EAB on their ash tree(s).
It is too late this year to make effective insecticide treatments to susceptible ash trees. For more on control options see ISU Extension & Outreach pamphlet PM 2084, Emerald Ash Borer Management Options.
Known distribution of the emerald ash borer in Iowa as of October 16, 2015.