Forestry resources

Oak wilt disease on an oak tree. Photo credit: Joseph O'Brian, USDA Forest Service, Bugwood.org

Oak wilt, caused by Ceratocystis fagacearum, is a lethal disease of oak (Quercus sp.). The disease is most serious on members of the red oak family, including red oak, scarlet oak, black oak, pin oak, etc. Members of the white oak family are generally not nearly as susceptible: white oak, swamp white oak, burr oak, etc. The disease is comparable to and potentially as serious as Dutch Elm Disease on American Elm. Both are introduced, exotic diseases caused by vascular wilt fungi; both diseases are transmitted by insects; both diseases can be transmitted through root grafts, and both fungi kill their host plants rather quickly.

 

To learn more about Oak Wilt:

 

Diagnosing and preventing Oak Wilt

 

Michigan Invasive Species

 

Report suspect oak wilt in Michigan:

Department of Natural Resources Forest Health Division: DNR-FRD-Forest-Health@michigan.gov or by phone at (517) 284-5895.

 

OR

 

Use the Midwest Invasive Species Information Network (MISIN) online reporting tool

 

If possible, please take one or more photos of the invasive species you are reporting. Also make note of the location, date and time of the observation. This will aid in verification of your report. You may be asked to provide your name and contact information if follow-up is needed.

Emerald Ash Borer (EAB), Agrilus planipennis Fairmaire, is an exotic beetle that was discovered in southeastern Michigan near Detroit in the summer of 2002. The adult beetles nibble on ash foliage but cause little damage. The larvae (the immature stage) feed on the inner bark of ash trees, disrupting the tree's ability to transport water and nutrients. Emerald ash borer probably arrived in the United States on solid wood packing material carried in cargo ships or airplanes originating in its native Asia. As of October 2018, it is now found in 35 states, and the Canadian provinces of Ontario, Quebec, New Brunswick, Nova Scotia and Manitoba.

 

For more information:

 

Emerald Ash Borer Information Network

 

 

 

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