State officials say the invasive insect that kills ash trees has been discovered in western Iowa, raising the total to 35 counties.
The Iowa Department of Agriculture says an emerald ash borer was found in the Harrison County community of Missouri Valley.
That’s the closest the pest has ever been found to the Siouxland area.
The insects were first detected in Iowa in 2010.
The borers have killed tens of millions of ash trees in 27 states.
It is native to Asia and was first reported in the U.S. in Michigan in 2002.