15 counties across Nebraska confirm infestation of emerald ash borer

LINCOLN, Neb. (KLKN) — Drought stress and pest threats are continuing to challenge trees across Nebraska.

According to the Nebraska Forest Service, 15 counties across the state have confirmed infestations of emerald ash borer in ash trees.

Courtesy Nebraska Forest Service

The insect is a beetle native to Asia that was introduced to Detroit, Michigan, in 2002.

The forest service says it has destroyed tens of millions of ash trees in more than 25 states, including Nebraska.

According to the forest service, around 44 million ash trees in Nebraska will die in the coming years because of beetle.

“Many EAB researchers say it has the potential to functionally wipe out the ash species with devastating economic and ecological impacts,” the forest service said.

Symptoms of infestation include canopy thinning and branch dieback, usually starting at the top of the tree.

Bark splitting, zigzag tunnels under the bark and D-shaped exit holes are also signs of the emerald ash borer.

The beetles spread mostly through human-assisted movement, such as moving infested firewood and nursery stock.

For information about treatments, see the publications Emerald Ash Borer Guidelines for Nebraska Homeowners and Emerald Ash Borer Treatment Options.