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

    Using diversity to reduce the impact of exotic pests: how it should be applied


    There are a multitude of exotic stressors, both insects and pathogens, that are or have the potential of, changing the landscape in our urban forests.  Diversity is often mentioned as a means to reduce the impact of these threats, but at what level, species, genus, family?  This session will cover the common factors as to why certain exotic stressors become destructive when introduced onto new continents and how diversity should be applied in our planting.


    John Ball is a Professor of Forestry at South Dakota State University when he also serves as the Forest Health Specialist for the South Dakota Department of Agriculture.  Dr. Ball holds a Ph.D in forest entomology and has extensive international travel to explore the relationship of exotic woody pests and their new hosts.

    Climbers' CornerTree Academy

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