Identifying the Ash Tree
an ash tree can be done by looking at the leaves. The leaves are
somewhat unique since they have several green leaflets per leaf stem,
usually 7. The leaflets are located directly across from each other with
1 at the end.
Emerald Ash Borer
The Emerald Ash
Borer is an exotic beetle from Asia which has now been found in Kane
County. The Emerald Ash Borer, although small, approximately 1/2 an
inch, can fly up to a mile from where it emerges.
Exit Holes in Tree
D-shaped exit holes
can be found on trees where the adult beetles emerged. A tree with
these holes has been infested for at least 1 year. They will be present
on the branches and the trunk.
"Suckers," or new
sprouts, may develop around the bottom of the main trunk of an infested
tree. They can grow until they are 2-3 inches in diameter and are again
attacked by the Emerald Ash Borer.
Tree canopy will begin thinning and branches will die. First there will be yellowing of the leaves, then dead branches. The thinning will begin at the top third of the tree, then spread over time. Usually, a tree will live 2-4 years after thinning at the top of the tree occurs
Notify the village for verification or for more information
If you suspect your ash trees may be infested or have a question, please email the Village Arborist.
Firewood from ash trees is a potential carrier of the Emerald Ash Borer. Firewood from areas infested with the Emerald Ash Borer, or unknown sources should not be brought into Lisle.
Plant only reputable, locally-grown vegetation from a supplier. Do not purchase stock from a contaminated area.
Fore More Information on the Emerald Ash Borer, access the links below: