In Upper Arlington, Ohio, trees are retained if residents offer to pay for and arrange treatment. However, before treatment permits are issued, the City evaluates the trees to make sure they are worth the effort, as many old ashes already have serious defects.
of Oakville’s ash trees and 80% of Oakville’s treatable ash canopy) using hyperspectral imaging technology (HSI). We were influenced by the success of the City of Milwaukee’s HSI Project in 2009.
In July, 2010, a plane collected data from Oakville with a specialized spectrometer calibrated with local ash tree spectral signatures. The objectives of this project include mapping all of the 177,300 ash trees, an updated canopy cover analysis on the heels of our 2005 UFORE Project, and—most promising for EAB management across the continent—an attempt to identify a spectral pattern to EAB infestation. The U.S. Forest Service is partnering with Oakville in this latest effort. Please see www.oakville.ca/eab.htm for more information about our EAB preparation and planning strategies.
—John McNeil, R.P.F., Manager of Forestry, Oakville, Ontario 26
The term “alligator banding” coined by Bryon Doerr and col- leagues describes the look of an EAB-infested tree, shortly before death. Photo by Mike Moore
planting of ash trees. We did so primarily because of reports that EAB was traveling in nursery stock, and we wanted to give the USDA’s “fire wall” eradication program time to work.
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By 2005, it was clear that eradication was a pipe dream. The City tree commission began to discuss the grim prognosis with staff so all options could be carefully weighed. Ultimately, the commission and staff concluded that prophylactic removal was probably best. A series of public meetings followed in 2006 to solicit
City Trees
ollowing the discovery of EAB in nearby Michigan in 2002, Upper Arlington, Ohio quickly suspended
