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HomeMy WebLinkAbout2021-11-15 Meridian City Arborist Mayor Robert E. Simison E IDIAN�� g City Council Members: g Tre Bernt Brad Hoa lun Joe Borton Jessica Perreault p A H � Luke Cavener Liz Strader Verticillium wilt, a disease caused by Verticillium dahliae is a soil borne fungal disease pathogen that is ever-present in many soils that commonly attacks maples, especially Norway Maple as well as many other woody plants in Meridian Soils.V. dahliae survives in the soil as clusters of thick-walled cells known as"microsclerotia."Microsclerotia are extremely resistant to drought and cold and can survive for a decade or more as dormant propagules just waiting for exudates from a suitable host to wake them up. Then they germinate much like a normal fungus spore and infect plants through the roots. Once in the vascular system,the fungus grows up into the stem and branches,plugging the vessels as it goes and eventually causing leaf wilt and branch death. Therefore, in an effort to comply with Integrated Pest Management Best Practices, it is strongly recommended by the Meridian City Arborist that alternative genera are used for new plantings and new developments in the City of Meridian. Recommended Alternatives to Norway Maple(A. platanoides)that show resistance to V. dahliae • Betula nigra-River Birch • Carpinus betulus-European Hornbeam or/Carpinus caroliniana American Hornbeam • Celtis occidentalis-Common Hackberry • Gingko biloba-Gingko • Gleditsia triacanthos var. inermis-Thornless Honeylocust o EXCEPT `Suncole' or Sunburst® • Liquidambar styraciflua- Sweetgum • Platanus X acerifolia-London Planetree • Quercus bicolor- Swamp White Oak • Quercus muehlenbergii-Chinkapin Oak • Tilia americana/cordata/tomentosa-Linden(American,Little Leaf,or Silver) • Zelkova serrata-Japanese Zelkova Maple species that are preferred to A.platanoides • Acer mid-Miyabe Maple (Rugged Ridge®, State Street®) o Acer truncatum Shangtung Maple (and/or Hybrids) o Crimson Sunset® o Norwegian Sunset® o Pacific Sunset® o Urban Sunset® Matthew Perkins I City Arborist City of Meridian I Parks and Recreation 33 E. Broadway Ave., Suite 206,Meridian,Idaho 83642 Phone: 208.888.3579 1 Mobile: 208.371.1755 1 Fax: 208.898.5501 City of Meridian,Department of Parks&Recreation 33 East Broadway,Suite 206,Meridian,ID 83642 Telephone(208)888-3579 Fax(208)898-5501 Mayor Robert E. Simison E IDIAN�� g City Council Members: g Tre Bernt Brad Hoa lun Joe Borton Jessica Perreault p A H � Luke Cavener Liz Strader The Emerald Ash Borer is a Highly Invasive Exotic species considered to be a major threat. This invasive pest has caused massive damage,devastating Ash tree populations in the Eastern and Midwestern United States. The Emerald Ash Borer has been tracked as far west as Colorado, and it will only be a matter of time before the pest arrives in Idaho and the Treasure Valley. The current inventory of the Urban Canopy in the City of Meridian is composed of greater than 15% Fraxinus. Which does not consider trees that are on private property or Right of ways,which would definitely be a higher percentage. Therefore,in an effort to comply with Integrated Pest Management Best Practices,it is strongly recommended by the Meridian City Arborist that alternative genera are used for new plantings and new developments in the City of Meridian. Recommended Alternatives to Ash trees(Fraxinus spy.)for the Treasure Valley • Acer miyabei-Miyabe Maple (Rugged Ridge®, State Street®) • Acer truncatum Shangtung Maple (and/or Hybrids) o Crimson Sunset® o Norwegian Sunset® o Pacific Sunset® o Urban Sunset® • Celtis occidentalis-Common Hackberry • Corgi columa-Turkish Filbert • Eucommia ulmoides-Hardy Rubber Tree • Ginako biloba-Gingko • Gymnocladus dioicus-Kentucky Coffee Tree o (preferably `Espresso-JFS' seedless) • Gleditsia triacanthos var. inermis-Thornless Honeylocust o EXCEPT `Suncole' or Sunburst® • Liquidambar styraciflua- Sweetgum • Liriodendron tulipifera-Tulip Tree • Ostrya vir ing iana-American Hophornbeam • Platanus X acerifolia-London Planetree • uercus bicolor- Swamp White Oak • uercus muehlenbergii-Chinkapin Oak • Tilia americana/cordata/tomentosa-Linden(American,Little Leaf,or Silver) • Ulmus hybrids-Elm Hybrids Matthew Perkins I City Arborist City of Meridian I Parks and Recreation 33 E. Broadway Ave., Suite 206,Meridian, Idaho 83642 Phone: 208.888.3579 1 Mobile: 208.371.1755 1 Fax: 208.898.5501 City of Meridian,Department of Parks&Recreation 33 East Broadway,Suite 206,Meridian,ID 83642 Telephone(208)888-3579 Fax(208)898-5501