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Monday, 15 November 2004
D0202
Monitoring and evaluating the health of ash trees on recreational sites in Lower Michigan
John A Witter, jwitter@umich.edu1, Catherine Resler, resler@umich.edu1, Katherine Windfeldt, katiewin@umich.edu1, and Andrew J. Storer, storer@mtu.edu2. (1) University of Michigan, School of Natural Resources and Environment, 3536 Dana Bldg, 430 E University, Ann Arbor, MI, (2) Michigan Technological University, School of Forest Resources and Environmental Sciences, 1400 Townsend Drive, Houghton, MI
During 2003-2004, over 300 sites with ash trees in or near recreational areas (parks, picnic areas, rest areas) throughout Lower Michigan were visited to determine the presence or absence of emerald ash borer (EAB), percent ash dieback, percent dead ash, tree vigor rating, and other crown variables. Ash on recreational sites in Michigan is both natural and planted in origin. Green ash and white ash are by far the most common ash species. More than 50% of the sites studied have mean tree diameters of greater than 25 cm. Mean percent ash dieback and mean percent dead ash varies greatly from 0% to close to 100%. Data on tree health is compared by tree species, tree origin (natural or planted), tree size, presence or absence of EAB, and type of recreational site.
Species 1: Coleoptera Buprestidae Agrilus planipennis (emerald ash borer)
Keywords: exotic pest, Fraxinus
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