Ash apocalypse: Preemptive attack against tree crusaders softens financial blow

17,000 ash trees felled in Sioux Falls since 2018 discovery of deadly borer

It’s the kind of war where all the visible casualties are on your side.

By the end of 2025, the city of Sioux Falls will have lost 17,000 ash trees to the deadly assault of the emerald ash borer.

Bryan Peterson arrived on the front lines in 2019. He took up his duties as a city urban forestry specialist a year after an ash borer infestation was confirmed in the state’s largest city.

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