ATC ‘22 ARBORPALOOZA: EXPLORING THE WIDE WORLD OF TREES
Spokane-based writer Jack Nisbet is the author of several collec - tions of essays that explore the human and natural history of the Northwest, including Purple Flat Top, Visible Bones , and Ancient Places . Nisbet has also written award-winning biographies of car - tographer David Thompson ( Sources of the River ) and naturalist David Douglas ( The Collector ). These two early visitors to the Pacific Northwest provided vital original information about the va - riety and tribal management of regional forests.
Nisbet’s most recent project, The Dreamer and the Doctor , traces the unlikely ad - ventures of late 19th-century Idaho homesteaders John and Carrie Leiberg. Be - tween 1895-1903, John Leiberg carried out landmark National Forest Reserve surveys in Idaho, Washington, Oregon, and Montana. Allelopathy - What it is and Why it Doesn’t Matter Monday, October 3, 2022 | 10:30 am to 11:30 am (1 CEU) Arborists have heard that black walnut trees ( Juglans nigra ) contain a toxic chemi - cal called juglone that will kill any other plants growing nearby. This phenomenon is called allelopathy, and in recent years many other possible allelopathic chemicals have been identified. This program will discuss the discovery of allelopathy and the practical significance of juglone and ohter possible allelopathic chemicals in the landscape. Presenter: Dr. Linda Chalker-Scott Location: Boardroo 5 (7th floor)
Dr. Linda Chalker-Scott has a Ph.D. in Horticulture from Oregon State University and is an ISA certified arborist and an ASCA con - sulting arborist. She is WSU’s Extension Urban Horticulturist and a Professor in the Department of Horticulture, and holds two af - filiate professor positions at University of Washington. She con - ducts research in applied plant and soil sciences, publishing the results in scientific articles and university Extension fact sheets. In 2020, she was named the new editor for the Western Arborist
magazine.
ATC ‘22 EXPLORATION GUIDE
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