Signs to Watch For on Yankton Ash Trees
Yankton · Ash Tree Treatment · Step 2 of 5
Yankton Fact Bank
County Yankton County
EAB status not yet confirmed
Population ~15,800 (2024 estimate)
Every fact cited
Canopy thinning from the top, D-shaped exit holes, split bark over S-shaped tunnels, and heavier woodpecker activity are the signs to know. River-adjacent trees in Yankton can also show stress from flooding or soil saturation, so don’t assume EAB from thinning alone — look for the more specific markers.
Frequently Asked
01
Could flooding near the Missouri River be mistaken for EAB damage?
Yes — root stress from periodic flooding can cause canopy thinning that looks similar at a glance. An arborist can tell the difference by checking bark and looking for exit holes rather than canopy condition alone.