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Emerald Ash Borer
Emerald Ash Borer
What is being done about EAB?

There is a national effort to limit the spread and impact of EAB. A national plan, coordinated by the United States Department of Agriculture, Animal Plant Health Inspection Service, guides what federal, state and local officials must do to manage this insect.

Quarantine: Once EAB is confirmed in an area, the infested area must be quarantined. This means selected materials such as ash firewood, nursery stock and ash logs may not be moved out of the infested area. The Quarantine area is county wide and determined by state officials.

In Conjunction with the WDNR, the WI Dept of Agriculture, Trade and Consumer Protection (DATCP) is currently leading the efforts to detect, plan for and limit the chances of movement of EAB into and throughout Wisconsin. The WI DNR, together with DATCP and University of Wisconsin scientists, have been conducting detection surveys of areas deemed high risk for introduction of EAB. These organizations have been hosting conferences for municipal forestry staff to learn about EAB and how they will need to handle the quarantine plans in their own county or city.

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Dane County Emerald Ash Borer and Wood Utilization Strategic Management Plan

With the emerald ash borer (EAB) already present in southeastern Wisconsin, Dane County is taking steps to prepare for this invasive beetle's arrival. With proactive preparation as its guiding philosophy, Dane County's EAB and Wood Utilization Strategic Management Plan will work to reduce the environmental impacts of the EAB within Dane County, mitigate the potential economic and social costs associated with control efforts and damage, and find ways to put wood formerly considered "waste" to positive and profitable use. Since an increased volume of wood residue will be among the EAB's most significant consequences, the plan also outlines various options for dealing with wood materials—from infestations as well as potential storm events—in an economically and environmentally sound manner.

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The City of Madison established an EAB Task Force in January of 2008. In 2013, EAB was discovered in Madison.

Since the discovery in 2013, the forestry section has been following the approved implementation plan for public street trees:

  1. Madison Parks Forestry continued to do branch sampling around the city. Besides the north and east side locations, no further infestations were discovered.
  2. Forestry staff evaluated which trees on the north and east side affected areas (see attached map)will need to be removed and which trees may be chemically treated later in the spring. Staff put letters on each of the affected household’s doorknobs during the inspection. The tree(s) that will require removal will be marked with a yellow dot on the street side of the trunk.

The tree(s) will be removed due to one or more of the following criteria:

  • Tree is structurally compromised or in poor condition.
  • Tree is located under high voltage electrical distribution line.
  • Tree trunk measures less than 10” in diameter at 4.5 feet (dbh) from the ground.
  1. In the spring the City will implement a chemical treatment program for trees that are in healthy condition and over 10 inches diameter. The city will use the injection treatments versus soil drench treatments to ensure the protection of ground and surface water quality.
  2. Madison Parks began an “Adopt-a-Park Tree” program for private citizens to help save, at their own expense, a publicly-owned ash tree in a Madison park. For more information, visit Adopt-a-Park Tree.
  3. Going forward, Madison Parks Forestry will replant publicly-owned trees in most locations. If people would like to help support this undertaking, a specific fund has been created with the Madison Parks Foundation.


EAB Susceptible Street Tree Maps

Each aldermanic district has its own EAB susceptible tree map. You will need to know what alder district you live in.

EAB Detection

Branch Sampling

May 2014 update - Madison Parks Forestry Section concluded its third year of ‘Branch Sampling’ test program for Emerald Ash Borer (EAB) detection last week. While it was confirmed in November 2013 that Emerald Ash Borer was present in Madison on the north and east sides, NO FURTHER evidence of Emerald Ash Borer was detected in the city at this time.

The Forestry staff sampled a total of 788 city ash trees in designated plots spaced at 6/10th mile intervals throughout the city limits. The bark was removed from the harvested branches to search for EAB larva. 

This is the third year Madison Parks Forestry branch sampling has been used to test for EAB infestation. This detection method provides a more sensitive measure than the visual evaluation and the purple traps. Branch sampling has shown to be 75% effective at finding EAB in low-level infestations. 


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