Ash tree killer turns up in western Iowa's Harrison County - KWWL - Eastern Iowa Breaking News, Weather, Closings

Ash tree killer turns up in western Iowa's Harrison County

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DES MOINES, Iowa (AP) - State officials say an invasive insect that kills ash trees has been discovered western Iowa, raising the total to 35 counties.

The Iowa Department of Agriculture said Thursday that an emerald ash borer was found in the Harrison County community of Missouri Valley. The insects were first detected in Iowa in 2010.

The insects 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.

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