City Trees

July/August 2012

City Trees is a premier publication focused on urban + community forestry. In each issue, you’ll learn how to best manage the trees in your community and more!

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this insect is seldom harmful to cacti; however, as more are revealed they should be washed off. Anything else you care to touch on? MJ: In the past in the Phoenix area, it has been practice for people to bring the trees, plants, and grass from where they moved in an effort to make Arizona more like "home." Over time this practice has harmed the natural desert. More water was required to keep these non- natives alive, leading to increased pollen, humidity, and spore growth. Many people moved to Phoenix years ago to escape the causes of lung and allergy conditions; however, they brought the very problem with them. Today newer developments are balancing between want- ing a "soft feel" landscape and a more nature-conscious one that uses indigenous plants. By using low water use plants and cacti, the prevalence of natives is coming back. Saguaro, although expensive and highly regulated, are becoming focal points of entryways, medians, and parks where Eucalyptus, Pinus, and cottonwood (Populus sp.) would have been installed previously. The saguaro may not be as effective a shade tree as the latter, but the unique shape and massive stature can definitely make a statement when the plant is used correctly. Canada's First Urban Forester Remembered Professor and forest pathologist Erik Jorgensen, creator of the term "urban forestry," died on May 25, 2012 at the age of 91. He was my professor when I studied for my master's degree in urban forestry. (I was the second UF in Canada and the first one to actually work in the field as the first urban forester/ municipal arborist in Windsor, Ontario.) Erik was a very humorous, intelligent, and inspirational university professor. He graduated many master's and PhD students during his career and also contributed hugely to the research on Dutch Elm Disease and other diseases. I was very fortunate to visit him in Guelph last year, when we shared many memories of the past. He will be sorely missed. —Lloyd Burridge, BScF, MScF, RPF, Municipal Specialist, and SMA Past President Maximize Your Return On Investment We can help you accurately quantify the benefits of your trees. Davey Resource Group provides community forestry solutions through innovation and expertise. davey.com/urbanforestry • info@davey.com 28 City Trees

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