Contact Us

Email us
Phone: +1.678.367.0981
Fax: +1.240.547.1795

Mailing Address

International Society of Arboriculture
PO Box 191
Annapolis Junction, MD 20701
United States

Physical Address

International Society of Arboriculture
270 Peachtree St NW, Suite 1900
Atlanta, GA 30303
United States

Order Delays Due to Physical Inventory

Due to ISA's annual physical inventory, orders placed between
2 p.m. EDT, Thursday, 20 June 2019, and 11:59 p.m. EDT, Friday 28 June 2019, will not ship until the week of 1 July 2019

Please plan your ordering accordingly.

We will resume regular turnaround times
1 July 2019.

Thank your for your patience.

Questions? Please call the customer service team at (678) 367-0981.

    Climbers' CornerTree Academy

    One Tree, Multiple "Jurisdictions": North American Experiences with Exotic Invasive Pests Managed at Local, Municipal, and Federal Levels


    Exotic invasive pests can cause significant destruction to individual trees and entire populations.  When managing such problems on a residential tree-by-tree basis the goals, objectives, and decisions may look vastly different than when compared to managing thousands or millions of trees.  Simply put, different stakeholders take different approaches, and frequently a single tree may have multiple entities with “jurisdiction” over it.  In North America three such pests provide excellent examples of this:  the Asian Longhorned Beetle, the Emerald Ash Borer, and the Mountain Pine Beetle.  


    Jim Zwack has a B.S. in Urban Forestry and an M.S. in Tree Physiology.  He is the Director of Technical Services at the Davey Institute, which is the research, education, and technical support arm of the Davey Tree Expert Company.  He has previously chaired the Education Committee for the Minnesota Society of Arboriculture, served on the Board of Directors for the Society of Commercial Arboriculture, and is currently the Chairman of the TREE Fund.  

    Climbers' CornerTree Academy

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