Emerald Ash Borer Discovered in Mills and Shelby Counties

Emerald Ash Borer

Emerald ash borer has been detected in Mills and Shelby counties for the first time. The invasive, tree-killing pest was collected from trees in Glenwood (Mills County) and Shelby (Shelby County).
Ash trees with low population densities of EAB have little or no external indicators. Infested trees may exhibit canopy thinning, woodpecker damage, leafy sprouts shooting from the trunk or main branches, serpentine (“S”-shaped) galleries under the bark, bark splitting and 1/8 inch D-shaped exit holes.
EAB spreads short distances naturally, but large jumps in distribution are made possible by human-assisted movement. The larval stage of the insect can unknowingly be transported in wood products such as firewood. Leaving firewood at home and using locally-sourced firewood where it will be burned can help limit the spread of EAB.
At this calendar date, the window for all preventive treatments is closed. If a landowner is interested in protecting a valuable and healthy ash tree within 15 miles of a known infestation, he or she should have landscape and tree service companies bid on work, review the bids this winter, and treat beginning spring 2021 (early April to mid-May).

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