Officials said the emerald ash borer continues to spread across Kentucky killing thousands of ash trees in the state.
The tiny insect was fist found in the state in 2009 and has spread to at least 21 counties since then. One of the largest infestations found so far is in a forest in northern Shelby and Franklin counties.
Adult beetles emerge in the spring and feed on ash leaves, but the main damage to trees comes from the bug's larvae, which feeds on the inner bark of the tree and can kill one in two years.
Jody Thompson, an environmental scientist with the Kentucky Division of Forestry, says state and local officials continue to fight the pest.
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