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Emerald Ash Borer
Pink Ribbons Affixed to Indicate Treated Trees
Seeing Pink? The Village's Forestry Crew has tied pink ribbons on Green and White Ash Trees that residents have opted to preventively treat against the Emerald Ash Borer. The ribbons denote the tree is not to be touched during removal efforts. Please do not disturb the ribbons as they will be used to identify which trees will be left alone as the program progresses.

Village Mitigation Efforts
The Village has been working to plan and respond to Emerald Ash Borer (EAB) since 2007 with the goal of the work to keep a full canopy of trees while reducing the number of ash and further diversifying the inventory. Dutch Elm Disease, Oak Wilt, and now Emerald Ash Borer, are all examples of a specific pest that attacks a certain species of tree which strengthens the argument for a widely diverse canopy. Ash trees were a popular parkway tree choice in the Midwest due to its ability to thrive in urban environments while being salt tolerant.  While Woodridge was not as extreme as some communities, ash still constituted over 20% of the Village owned inventory.  To date, approximately 2,500 ash trees have been removed and 1,800 replaced.  An additional 600 trees are planned for planting in the spring of 2016.  If a new tree is planted in the parkway in front of your home, the Village will attach a gator bag that will be filled periodically depending on weather conditions.  The Village greatly appreciates any help that residents can provide with filling the bag once or twice per week (these bags slowly release the water over a 6 to 12 hour period to soak the root base). The Village continues to monitor the health of all trees and partners from time to time with the Morton Arboretum for guidance and to conduct research.

The Emerald Ash Borer
The Emerald Ash Borer (EAB) is a small, metallic-green beetle that has killed tens of millions of ash trees in the United States and Canada. EAB larvae burrow into the bark of ash trees, interrupting the supply of nutrients causing the trees to starve and eventually die. While the beetle does not pose any risk to the public health, it does threaten the ash tree population.

All or parts of 24 counties in north and central parts of Illinois are under quarantine and prohibit the movement of potentially contaminated wood products, including ash trees, limbs, branches, and all types of firewood to help prevent the spread of the beetle.

Emerald Ash Borer is difficult to detect, especially in newly-infested trees. Individuals should watch for metallic-green beetles about half the diameter of a penny on or near ash trees that are showing signs of disease or stress. Other signs of infestation in ash trees include D-shaped holes in the bark of the trunk or branches and shoots growing from its base. If considering treatment of trees with insecticide, you are encouraged to learn the facts and make an informed choice based upon your circumstances. The Morton Arboretum website carries a fact sheet on insecticides that will help homeowners consider their options.

Anyone in Woodridge who suspects a tree has been infested is urged to contact the Public Works Department at 630-719-4753 and for more information Illinois Extension Office's website.

Emerald Ash Borer Background Information
The Emerald Ash Borer (EAB) is a small (1/2 inch long, 1/8 inch wide) metallic green beetle that has killed millions of ash trees across the Midwest. Ash trees are very common in landscapes and most species, namely white ash and green ash, are native to Illinois forests. Pictures of various types of ash trees can be viewed at the Morton Arboretum website.

Infestation of Emerald Ash Borer can be very difficult to detect until the branches of an infected tree begin to die. The most visible sign that the EAB is present is crown dieback, which appears after the first year of infestation. Usually the leaves on the upper third of the tree will begin to thin and the branches will begin to die. A number of suckers and branches will also sprout from the base of the tree and on the trunk. The bark may split vertically and woodpeckers may begin to feed on the beetle larvae leaving visible damage on the bark. Adult beetles emerging from trees will leave a very small 1/8 inch diameter distinctly D-shaped exit hole that may appear anywhere on the trunk or upper branches. Distinct S-shaped larval feeding tunnels may also be apparent under the bark. Typically, the tree will die in about three years.

Do Not Transport Firewood
Emerald Ash Borer can easily be transported in ash logs. Make sure to purchase firewood locally from a known source and be sure to use all of the firewood in the cold months so that no hidden Emerald Ash Borer larvae or adults can survive on logs left through the spring.