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History of ISA: 1960s


International Shade Tree Conference

The 1960s was a decade of change throughout the world, and the National Shade Tree Conference underwent significant transitions as well. In 1960, Canadian members petitioned the NSTC to change its name from National to International. A substantial number of Canadians felt misrepresented by the term national. Accordingly, the organization became the International Shade Tree Conference (ISTC) in 1961.


Opening ceremony, San Francisco, 1962.

Shh! A Whisper Chipper!

In 1963, the Conference created awards to recognize the service of its members. The Author’s Citation was granted to authors for sustained excellence in the publication of timely information pertaining to the field of arboriculture. The Award of Merit was designed to recognize meritorious service in advancing the principles, ideals, and practices of arboriculture, and is the highest award made by the Society

By 1964, it had become apparent that new action had to be initiated for the future of the ISTC because the heavy burden of work and responsibility for ISTC could no longer be continued on a part-time basis. In recognition of his contributions, the Conference changed Lewis Chadwick’s official status in 1966 from secretary-treasurer to executive director.

Rotomist sprayer demonstration at an ISTC conference field day.

Right-of-way spraying by rail. Utility-related issues became a significant portionof ISTC conferences in the 1960s.

Dr. Paul E. Tilford retired as editor in 1967 after 30 years of service. Noel B. Wysong of River Forest, Illinois, served in that capacity for the next two years. Chadwick retired as executive director in 1969 to an emeritus status. The Executive Committee then appointed Dr. Eugene B. Himelick as an unpaid executive director and Ervin C. (Cal) Bundy as full-time executive secretary. Because both resided in Urbana, Illinois, the official office was moved from Chadwick’s home in Columbus, Ohio.

As the new executive director, Himelick served as liaison between the ISTC Executive Committee and the executive secretary, with authority to delegate responsibilities to the secretary as needed to oversee and direct the functions of the Conference. He also served as chairman of the program committee for the annual conference. As executive secretary, Bundy was responsible for the overall management of the organization.

Every commercial firm needs one of these! Washington, D.C., 1965.

Activities at the 1966 conference held in Cleveland, Ohio.

"English Elm" planted about 1850, one of the few trees left of a group lining the early streets of the "forest city."

The origin and development of special interest groups, such as utility, commercial, and municipal arborists, began with discussion sessions at conferences in the 1950s and 1960s. Beginning in 1969, these groups were granted a recognized status as special interest organizations within the Conference. A new article of the Constitution in 1969 provided for “associated special interest groups” within the Conference. The term special interest group would later be changed to professional affiliation.


ISTC used buses to transport delegates to the field day in Philadelphia, 1967.

Eugene B. Himelick
Executive Director - 1969-1979
Professional Affiliations

The origin and development of special interest groups, such as utility, commercial, and municipal arborists, began with discussion sessions at conferences in the 1950s and 1960s. Beginning in 1969, these groups were granted a recognized status as special interest organizations within the Conference. A new article of the Constitution in 1969 provided for “associated special interest groups” within the Conference. The term special interest group would later be changed to professional affiliation.

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